NF-241-05__Z_Drive_Tech_Man.pdf

S9241-85-MMA-O 1 0

091 0-LP-228-81 00

TECHNICAL MANUAL

FOR

Z-DRIVE, MODEL 260/370-H

la6-FOOT TORPEDO TEST CRAFT [YTTJ

DESCRIPTION. OPERATION. MAINTENANCE

AND ILLUSTRATED PARTS BREAKDOWN

DISTRIBUTION STATEMENT B: DISTRIBUTION AUTHORIZED ~O U,S, GOVERNMENT ACENCIES ONLY; ADMINISTRATIVE/OPERATIONAL USE:

DATE OF PUBLICATlON. OTHER REQueSTS FOR THIS DOCUMENT NUST BE REFERRED TO NAVAL seA

SYSTEMS COMMAND (SEA-OtB2) .

WARNING: THIS DOCUMENT CONTAINS TECHNICAL DATA WHOSE EXPORT IS RESTRICTED BY THE ARMS EXPOR T CONTROL ACT (TITLE 21. U .S.C.

SEC. 2751 £T.SEQ.) OR EXECUTIve ORDER 12410. VIOLATIONS OF THEse EXPORT LA .... S ARE SUBJECT TO SEVERE CRIMINAL PENAL TIES.

DESTRUCTION NOTICE: DESTROY BY ANY METH OD THAT WILL PREVENT DISCLOSURE OF CONTENTS OR RECONSTRUCTION OF THE

DOCUMENT.

PUBLISHED BY DIRECTION OF COMMANDER, NAVAL SEA SYSTEMS COMMAND

FOR OFFICIAL USE ONLY 30 AUGUST ~89

S9241-B5-MMA-OI0

LIST OF EFFECTIVE PAGES

Date of original page is:

Original . . . 0 . . . 30 August 1989

Total number of pages in this publication is 148 consisting of the following:

Page • Change No. No.

Page 'Change No. No.

Title and A...... ... ....... .... .. ..... .. .... ..... 0 2-6 Blank CS and CF 1 and 2 ..... .... ........... ... 0 3-1 through 3-8 A and P-l ........................................ 0 4-1 A and P-2 Blank ................... .......... 0 4-2 Blank Change Record-I...... ........................ 0 5-1 through 5-8 Change Record-2 Blank ..... .... ....... .•. 0 6-1 through 6-54 Foreword-I........................................ 0 7-1 through 7-41 Foreword-2 Blank ............................. 0 7-42 Blank i through xii ... .. .... .... .............. ... ... ... 0 8-1 1-1 through 1-4 ................................ 0 8-2 Blank 2-1 through 2-5

' Zero in this column indicates an original page.

A

NAVSEA 9086/11 (8/88)

TM Identification Number

S9241-B5-MMA-010

S9241-B5-MMA-010

NA VSEA TECHNICAL MANUAL

CERTIFICATION SHEET

Publication Date . 30 August 1989

Change No. __ _ Book No.

Revision No. ___ Volume No. __ _ Part No. ___ __

TM Specification, Chapter No. _=""" Other No.

TMCR/TMSR No. _8~6~0~54~9~-0~0~0 __________________________ __

Title Z-drive, Model 260/370-H Thruster

FOR CHANGES AND REVISIONS: (Indicate "NA" if item not applicable)

Purpose of Change/ Revision: NA -------------------------------------------------

TM/ Change/Revision Numbers Superseded: . NA

TMDER/ ACN Numbers Incorporated:..: -..!.N::A!...-__________________________ _

Ship or Equipment Alteration/Field Change {FC)/Engineering Change (EC)

Numbers Incorporated: __ .:..N::.A=-________________________________ __

CERTIFICATION STATEMENT

This is to certify that responsible NA VSEA activities have reviewed the basic technical manual [ X j, revision r . j, or change [ j for acquisition compliance, technical coverage, and printing quality. This form is for internal NAVSEA management use only, and does not imply contractual approval or acceptance of the technical manual by the Government, nor relieve the contractor of any responsibility for delivering the technical manual in accordance with the contract requirements.

NAVSEA SIGNATURES

Activity Name Signature Organization Code Date

Acquisition

Technical

Printing Release

Certification Sheet 1

S9241-BS-MMA-OIO

APPROVAL AND PROCUREMENT RECORD PAGE

APPROVAL DATA FOR: NAVSEA S9241-BS-MMA-01O

TITLE OF MANUAL: Z-drive, Model 260/ 370-H Thruster

APPROVAL AUTHORITY: NAVAL SEA COMBAT SYSTEMS ENGINEERING STATION,

CODE 60

QUANTITY

CONTRACT BOAT OF

NUMBER APPLICABILITY MANUALS

N00024-87-C-2026 186YTT9-10 4

N00024-88-C-2093 186YTTll-12 4

REMARKS:

CHANGE NO. 0

QUANTITY

OF

EQUIPMENT

BUILDING

YARD

McDermott Shipyard Morgan City Division P.O. Box 588 Amelia, LA 70340-0588

Approval and Procurement-l/ (Approva! and Procurement-2 Blank)

S9241-B5-MMA-010

FOREWORD

This Technical Manual is intended to provide operation, maintenance and repair information for the Z-drive, Model 260/ 370-H Thruster. The manual contains descriptive and functional information, operating instructions and maintenance and repair instructions for this system. This manual is one volume subdivided into the following chapters:

CHAPTER 1 - GENERAL INFORMATION AND SAFETY PRECAUTIONS

CHAPTER 2 - OPERATION

CHAPTER 3 - FUNCTIONAL DESCRIPTION

CHAPTER 4 - SCHEDULED MAINTENANCE

CHAPTER 5 - TROUBLESHOOTING

CHAPTER 6 - CORRECTIVE MAINTENANCE

CHAPTER 7 - ILLUSTRATED PARTS BREAKDOWN

CHAPTER 8 - INSTALLATION

Ships, training activities, supply points, depots, Naval Ship'yards, and Supervisors of Shipbuilding are requested to arrange for · the maximum practical use and evaluation of NAVSEA technic,,;! mimuals . · All errors, omissi·ons, discrepancies and suggestions for improvement to NAVSEA technical manuals shall be reported to Commanding Officer, Naval Ship Weapon Systems Engineering Station (Code SHOO), Port Hueneme, CA 93043-5007 on NAVSEA Technical Manual Deficiency /Evalul'tion Report, Form NAVSEA 9086/ 10. To facilitate such reporting, three copies of Form 9086 / 10 are included at the end of this technical manual. All feedback comments shall be thoroughly investigated and originators will be advised of action resulting therefrom. Extra copies of NAVSEA Form 9086/ 10 may be requisitioned from the Naval Publications and Forms Center, Philadelphia, PA 19120.

Foreword-1/ (Foreword-2 Blank}

S9241-B5-MMA-OIO

TABLE OF CONTENTS

Chapter/ Paragraph Title

1. GENERAL INFORMATION AND SAFETY PRECAUTIONS

1-1 1-1.1 1-1.2 1-2

INTRODUCTION

GENERAL INFORMATION

SAFETY PRECAUTIONS :

EQUIPMENT DESCRIPTION ............. ...•

Page

1-1

1-1 1-1 1-1 1-1

2. OPERATION ................ .................. .. ... .................... .... .. .... ... .. ....... ..... ......... ........ 2-1

2-1 2-2 2-3 2-3.1 2-3.2 2-3.3 2-4 2-4.1 2-4.2 2-4.3

INTRODUCTION

PRE-START CHECKS

OPERATION ... .. .. ...... ..... ......... ..... ... ....... .. :

STEERING MODE

MANEUVERING MODE

STATION-IN-CONTROL TRANSFER

LUBRICATION SYSTEMS

DRIVE LEG LUBRICATION SYSTEM

SEAL OIL LUBRICATION SYSTEM

HYDRAULIC FLUID REQUIREMENTS

.3. FUNCTIONAL DESCRIPTION .............................. ............ :

3-1 3-2 3-2.1 3~2.1.1

3-2.1.2 3-2.1.3 3-2.2 3-2.2.1 3-2.2.2 3-3 3-3.1 3-3.2 3-3.3 3-3.4 3-3.5 3-4 3-4.1 3-4.2 3-4.2.1 3-4.2.2 3-4.3 3-4.4 3-4.5 3-4.6 3-4.7 3-4.8

INTRODUCTION ...... ... .. ... .. ...... .. ... ........... ................... . :

OPERATION

CONTROLS ........... ...... ... .......... ......... ........ ....... ... ....... :

Combilever Rudder Stick ....... ... ...... ..... ... .... ........ :

Steering indicator .......................... :

OPERATIONAL MODES

Steering Mode ' .. ... ;

Maneuvering Mode

MAJOR COMPONENTS :

PROPULSION MOTOR

LOWER GEAR BOX

INTERMEDiATE SECTION

UPPER GEAR BOX

STEERING FEEDBACK ASSEMBLy

HYDRAULIC POWER PACK

HYDRAULIC PUMP

ELECTRIC DISPLACEMENT CONTROL

. First Stage Second Stage

ELECTRIC DRIVE MOTOR

HYDRAULIC RESERVOIR

HIGH-PRESSURE RELIEF VALVES

LIQUID LEVEL HYDROSTATIC PRESSURE SWITCH

HEAT EXCHANGER

HOT OIL SHUTTLE/ RELIEF VALVE

2-1 2-1 2-3 2-3 2-3 2-3 2-3 2-4 2-4 2-5

3-1

3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-2 3-2 3-2 3-2 3-3 3-3 3-3 3-3 3-5 3-6 3-6 3-6 3-6 3-6 3-6 3-7 3-7

TABLE OF CONTENTS (Continued)

Chapter / Paragraph Title

3-4.9 3-4.10 3-4.11

RETURN LINE FILTER

SUCTION LINE FIL TER

PRESSURE GAUGES

4. SCHEDULED MAINTENANCE ....... .. :

4-1 INTRODUCTION

5. TROUBLESHOOTING

5-1 INTRODUCTION ...... ,

5-2 TROUBLESHOOTING PROCEDURES .-

6. CORRECTIVE MAINTENANCE

6-1 INTRODUCTION .. .... ............. ..... ................ .. ............... .•

6-2 TOOLS AND EQUIPMENT

Section 1. ADJUSTMENT AND ALIGNMENT

6-3 INTRODUC"TION

6-4 ADJUSTMENT AND ALIGNMENT

6-4.1 SWASHPLATE NEUTRAL ADJUSTMENT ..... ......... "

6-4.2 ELECTRICAL DISPLACEMENT CONTROL NEUTRAL

ADJUSTMENT ............. .. .... .... ... ... ............ ...... .... ... :

6-4.3 STEERING SECTION BACKLASH ADJUSTMENT

6-4.4 COMMUTATOR NEUTRAL ZONE ADJUSTMENT

Section 2. REPAIR

6-5 INTRODUCTION "

6-6 CLEANING AND INSPECTION

6-6.1 CLEANING .. ................................................ .... ........ .. ..... ......... , 6-6.2 INSPECTION

6-7 REP AIR/REPLACEMENT

6-7.1 GENERAL .... ... .......•

6-7.2 PRELIMINARY PROCEDURES AND SAFETY

INFORMATION .. :

6-8 HYDRAULIC POWER P ACK

6-8.1 HYDRAULIC PUMP

6-8.1.1 Removal 6-8.1.2 Disassembly 6-8.1.3 Cleaning and Inspection 6-8.1.4 Reassembly 6-8.1.5 Reinstallation

6-8.2 ELECTRIC DRIVE MOTOR

6-8.2.1 Removal 6-8.2.2 Disassembly 6-8.2.3 Reassembly

Page

3-8 3-8 3-8

4-1

4-1

5-1

5-1 5-1

6-1

6-1 6-1

6-2

6-2 6-2 6-2

6-3 6-4 6-7

6·9

6-9 6-9 6-9

6-10 6-10 6-10

6-10 6-11 6-11 6-11 6-11 6-14 6-16 6-24 6-24 6-24 6-25 6-26

Chapter/ Paragraph

6-8.2.4 6-9 6-9.1 6-9.1.1 6-9.1.2 6-9.1.2.1 6-9.1.2.2 6-9.1.3 6-9.1.3.1 6-9.1.3.2 6-9.2 6-9.2.1 6-9.2.2 6-9.2.3 6-9.2.4 6-9.3 6-9.3.1 6-9.3.2 6-9.3.3 6-9.3.4 6-9.4 6-9.4.1 6-9.4.2 6-9.4.3 6-9.4.4 6-9.5 6-9.5.1 6-9.5.2 6-9.5.3 6-9.5.4 6-9.6 6-9.6.1 6-9.6.2 6-9.6.3 6-9.6.4 6-9.6.5 6-9.7 6-9.8 6-9.9 6-10 6-11

S9241-B5·MMA·010

TABLE OF CONTENTS (Continued)

Title

Reinstallation .... ... ...... ' "

Z·DRIVE

PROPULSION MOTOR

Removal Disassembly ............. ... ... .... .... ..... ...... .... ... .... .... .. ....... .. ... ....... ....• Coupling Hub Armature and Stator .... ... ... .. ... .•..... .. .... . :

Reassembly Armature and Stator ... ... ...... .. .... .. ... .................. .. .... ... ..... :

Coupling Hub

UPPER GEAR BOX

Removal Disassembly .. ...... .... .... . .... .. , Reassembly Reinstallation

INTERMEDIATE SECTION

Removal Disassembly .. .. ...... ... .. ... ...... ..... ..... ... , .. ........ .. .......... ...... .. ... ..... ... ... .•..

Reassembly Reinstallation • LOWER GEAR BOX AND PROPELLER ASSEMBLy Removal Disassembly ........ .... .... .. ... ...... ... .... ...... ...... ........ ..... .... ...... ... ......... . , .. .

Reassembly .... ....... .... ....... .... .. ... ...... ....... .... .. ..... ..... ..... ;

Reinstallation

FEEDBACK BOX ASSEMBL Y

Removal Disassembly Reassembly ......... .... ....... .... .......... .... :

Reinstallation

PISTON MOTOR

Removal Disassembly Cleaning and Inspection Reassembly Reinstallation

DUAL-POSITION FEEDBACK

STEERING INDICATOR

SPEED REGULATOR AND POSITIONER

RETURN LINE FILTER

HOT OIL SHUTTLE/ RELIEF VALVE ........ :

Page

6·26 6·26 6·26 6·26 6·28 6-28 6·28 6-30 6· 30 6·33 6·33 6·33 6-33 6-35 6-39 6-39 6·39 6·40 6·41 6·43 6·43 6·43 6·44 6·45 6-48 6-48 6-48 6-48 6·49 6-50 6-50 6·50 6-50 6·51 6·51 6-52 6-52 6·53 6-53 6-54 6-54

7. ILLUSTRATED PARTS BREAKDOWN ............ .... ... ... ... .. .. ... ... ...... .. .... ........ ... . 7·1

7-1 INTRODUCTION .. ......... ...... ......... ...... ..... .......... .. . ... ... .... ... . ... ...... ...• 7·1

8. INSTALLATION ... ....... .. ....... ... ... ... ... .... ........ ... .. ...... ............. .... ..... ...... ... ...... ... .. . 8·1

8·1 INTRODUCTION ...... ......... .. .... ....... .. ... .. .... ... ......... ....... .. .... ...... ...... . 8·1 iii

Figure

1-1 2-1 2-2 3-1 3-2 3-3 3-4 3-5 3-6 6-1 6-2 6-3 6-4 6-5 6-6 6-7 6-8 6-9 6-10 6-11 · 6-12 6-13 6-14 6-15 6-16 6-17 6-18 6-19 6-20 6-21 6-22 6-23 6-24 6-25 6-26 6-27 6-28 6-29 6-30 6-31 6-32 6-33 6-34 6-35 6-36 6-37 6-38 6-39 iv

S9241-B5-MMA-010

LIST OF ILLUSTRATIONS

Title

Z-Drive, Model 260/ 370-H Control Station Forward and Reverse Home Position Steering Indicator Wiring Diagram Hydraulic Power Pack Hydraulic System Schematic Hydraulic Pump Drive Motor Controller ........ ... :

Hydrostatic Pressure Switch Pressure Drop Chart Low-Pressure Line Location Loosening Servo-Locknut EDC Neutral Adjustment Neutral Adjustment Backlash Adjustment Bearing Pattern Types of Gear Errors Commutator Chart Temper Load Ring ...... ... ...... ... ...... .... ...... .... :

Gerotor Assembly Removal Front Cover ....... ....... ... ....... ........ .. ... .. ............. ...... .. .. .... ..... .... ....... ..... ....... .. ....... : ..

Retaining Ring and Bearing Removal ......................... :

Servo-Cover Removal Servo-Orifice Removal ........................................................... ........... ......... ;

Spacer and Cover Reinstallation Servo-Orifice Inspection Needle Bearing Installation Feedback Pin and Swash- plate Link Pin Locations Front Cover Components Servo-Spring Components Servo-Spring Assembly Bearing Ring, O-rings, and Seal Rings Installing Valve Plate Installing Slipper Hold-Down Pins Installing Ball Guide Retainer Installing Piston Assembly Installing Cylinder Block Installing Swash plate Ring and Bearing Installation Sequence Seal Installation Tool Gerotor Ring and Pin Temper Load Ring Installation ............ ... .. ...... ......... .. . :

Bypass Valve Installing O-rings into Housing EDC O-rings Installing Screen Plug Installing Control Sleeve Installing Bearing Puller Motor Mount Locations

Page

1-1 2-2 2-3 3-1 3-4 3-5 3-7 3-7 3-8 6-2 6-2 6-3 6-3 6-5 6-5 6-6 6-8

6-12 6-12 6-14 6-14 6-15 6-15 6-15 6-15 6-16 6-16 6-17 6-17 6-17 6-18 6-19 6-19 6-19 6-19 6-20 6-20 6-21.

6-21 6-22 6-22 6-22 6-23 6-23 6-23 6-24 6-26 6-27

.,r

Figure

6-40 6-41 6-42 6-43 7-1 7-2 7-3 7-4 7-5 7-6 7-6 7-7 7-7 7-8 7-9 7-10 7-11 7-12 7-13 7-14 7-15 7-16 7-17 7-18 7-19 7-20 7-21 7-22 7-23 7-24

S9241-B5-MMA-010

LIST OF ILLUSTRATIONS (Continued)

Title

Motor Mount Assembly Hub Puller Commutator and Brush Holder Cap Screw Torque Values ........................................................................... :

Hydraulic Power Pack Hydraulic Pump .......• Electric Drive Motor .......................• Propulsion Motor Flexible Coupling Upper Gear Box (Sheet 1 of 2l Upper Gear Box (Sheet 2 of 2 Intermediate Section (Sheet 1 of 2l Intermediate Section (Sheet 2 of 2 Lower Gear Box Piston Motor Feedback Box Assembly Dual-Position Feedback Steering Indicator ..... ........ ... ........ ..................................... ............ .. ....... .... ... ;

Speed Regulator and Positioner .............................. :

Oil Tank Assembly ................................................... : .... ~ Tank End Cover Filler/Breather Assembly Suction Line Filter Hydrostatic Pressure Switch .... ....... ..................... . .. , Ball Valve .. , Sight Level Gauge Heat Exchanger Return Line Filter Hot Oil Shuttle/Relief Valve Pressure Gauge

Page

6-28 6-28 6-32 6-37

7-2 7-4 7-7 7-9

7-11 7-12 7-13 7-15 7-16 7-18 7-20 7-22 7-24 7-26 7-28 7-30 7-31 7-32 7-33 7-34 7-35 7-36 7-37 7-38 7-39 7-41 v

Number

2-1 2-2 2-3 5-1 &-1 7-1 7-2 7-3 7-4 7-5 7-6 7-7 7-8 7-9 7-10 7-11 7-12 7-13 7-14 7-15 7-16 7-17 7-18 7-19 7-20 7-21 7-22 7-23 7-24 vi

S9241-B5-MMA-010

LIST OF TABLES

Title

Principal Characteristics Lubricant Chart Fluid Viscosity Limits for Petroleum-Based Fluids Fluid Temperature Limits ., ......... ... ...... .... .......... ...... .. ........................ .. ~ Troubleshooting Guide Torque Specifications Hydraulic Power Pack Hydraulic Pump Electric Drive Motor Propulsion Motor Flexible Coupling Upper Gear Box Intermediate Section Lower Gear Box Piston Motor Feedback Box Assembly Dual-Position Feedback Steering Indicator Speed Regulator and Positioner .... .... .. ............ :

Oil Tank Assembly .......... ....... ...... .. ..... ....... ...... . : ... : ........................ . :

Tank End Cover Filler/Breather Assembly Suction Line Filter Hydrostatic Pressure Switch ........................... , Ban Valve Sight Level Gauge ................. ... ................................ : ..... :

Heat Exchanger Return Line Filter Hot Oil Shuttle/ Relief Valve Pressure Gauge

Page

1-2 2-4 2-5 2-5 5-1

&-30 7-3 7-5 7-8

7-.10 7-11 7-14 7-16 7-19 7-21 7-22 7-24 7-27 7-29 7-30 7-31 7-32 7-33 7-34 7-35 7-36 7-37 7-38 7-40 7-41

SAFETY SUMMARY

GENERAL SAFETY NOTICES

The following general safety notices supplement specific warnings and cautions appearing elsewhere in this manual. General and specific precaut ions must be understood and applied during operation and maintenance. The Commanding Officer or other authority will issue orders as deemed necessary for any situation. not covered in the general and specific safety precautions.

KEEP A WAY FROM LIVE CIRCUITS

Operating personnel must observe all safety regulations at all times. Do not replace components, make adjustments, or perform .internal equipment maintenance without first securing electrical power. Dangerous potential may exist when the electrical power is in the OFF position because of charges retained by capacitors. Before touching, always secure electrical power and discharge the circuit by shorting through a load to ground wi th a shorting probe.

DO NOT REP AIR OR ADJUST ALONE

Under no circumstances should any person reach into or enter equipment enclosures for the purpose of servicing or adjusting equipment except in the presence of personnel capable of rendering aid.

FIRST AID

An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention immediately.

ENERGIZED EQUIPMENT

Before working on energized equipment, ensure against grounding.

repairs/ adjustments with one hand, leaving the other hand clear of the work alone.

MOVING EQUIPMENT

If possible, make equipment. Never

If equipment must be repaired/ adjusted while in motion, a safety watch shall 'be pos ted.

The safety watch must have a full view of the repair / adjustment operation and immediate access to controls that can stop the equipment in motion.

SPECIFIC SAFETY NOTICES

The specific safety warnings and cautions summarized below appear in appropriate chapters of this manual. Each is referenced to the text page on which it appears.

A WARNING is an operating or maintenance procedure, practice, condition or statement which, if not strictly observed, could result in injury or death to personnel.

A CAUTION is an operating or maintenance procedure, practice, condition or statement which, if not strictly observed, could result in damage to, or destruction of, equipment or loss of mission effectiveness.

vii

The following warnings and cautions appear ID the text of this volume and are repeated here for emphasis.

viii

WARNING

To prevent injury or death, ensure there are no divers near or around the Z drives. (Page 2-1)

WARNING

To prevent injury or death, ensure electrical power is de-energized and tagged OUT-OF-SERVICE. (Pages 6-4,6-10)

WARNING

To prevent injury, do not reach inside gear case while Z-drive is rotating.

(Page 6-4)

WARNING

To adjust neutral requires operating the pump. Take the necessary safety precautions such as having unnecessary personnel stand clear and an assistant stand by for any emergency. Maximum system pressure may occur upon start

up. Ensure the operator is not in a position to be injured. (Pages 6-2, 6-3)

WARNING

To prevent injury or death, special care and properly insulated instrumentation should be used. It is recommended that the commutation adjustment be supervised by someone who understands the theory of de machine adjustment , is experienced making the adjustments, and understands the hazards involved in working with a live electrical apparatus. (Page 6-7)

WARNING

Use of cleaning solvent in a confined area can result in IDJury or death. Avoid prolonged breathing of fumes and solvent contact with skin or eyes. Avoid use near heat or open flame. (Page 6-9)

WARNING

Never turn a stream of compressed air on anyone. Severe injury or death could result. (Page 6-9)

WARNING

To prevent injury or death, ensure there is no hydraulic pressure on the Z-drive system components. (Page 6-11)

WARNING

To prevent Injury or death, ensure extreme care and proper lifting devices are used. The equipment is heavy. (Pages 6-11 , 6-24, 6-26, 6-27, 6-29, 6-32, 6-39, 6-40, 6-43, 6-44, 6-46, 6-47, 6-48)

WARNING

To prevent serious eye Injury while removing/ installing retaining ring(s), wear safety eye protection. Ensure retaining ring(s) is secure in the ring groove.

(Pages 6-11, 6-13, 6-17, 6-18, 6-20, 6-21, 6-25, 6-29, 6-31, 6-32, 6-47, 6-50, 6-51)

WARNING

To prevent injury or death, ensure the lifting eyebolt is used to lift the motor off its foundation. (Page 6-25)

WARNING

To prevent injury, exercise extreme care and wear insulated gloves when handling heated components. (Page 6-31, 6-32, 6-35, 6-36, 6-38, 6-41, 6-45)

WARNING

Removal of the Z-drive intermediate (steering) section must be accomplished with the craft in dry dock. To do otherwise presents an imminent danger of flooding. (Page 6-39)

CAUTION

It is important that the oil level is not too high nor too low since the oil expands during operation due to aeration and temperature rise. (Page 2-1)

CAUTION

Ensure that the craft \s safely moored to the pier when testing the Z-drives.

(Page 2-1) ix x

CAUTION

Do not use heavier oil. Heavier oils will result In extreme power losses and higher temperature build-up. (Page 2-4)

CAUTION

Do not allow the reservoir to run dry since the seals could be damaged and sea water could enter the system. (Page 2-4)

WARNING l)-- To pre.Lnt internal component damage, the Z-drive input shaft must be securely suppor;rduring further disassembly. Exercise care not to disturb input shaft position while removing or installing shims. (Page 6-5)

CAUTION

Do not use harsh abrasives that might scratch, score, or otherwise mar surface finisbes. (Page 6-9)

CAUTION

Do not allow machined or lapped mating surfaces to contact any surface without protection against nicks, scratches, burrs, etc. (Page 6-9)

. CAUTION

Avoid scratching and nicking critical surfaces of balls and rollers in bearings;

take care to protect surfaces of shaft/ bearing fi~. (Page 6-9)

CAUTION

Do not clean bearings ultrasonically; this method can pit bearing surfaces. Do not agitate any other parts longer than five minutes at a time. (Page 6-9)

CAUTION

Ensure that low-pressure air used to dry components is clean and dry. Moisture in an air line can cause rust. (Page 6-9)

CAUTION

If polishing is required, avoid leaving deposits of metal dust in and around bushings. (Page 6-9)

CAUTION

The relief valves are factory set and should not be tampered with except when replacing the entire cartridge. Disassembly may change the setting and cause erratic unit operation or premature failure. (Page 6-13)

CAUTION

Do not alter the shims or interchange parts with another valve. (Page 6-13)

CAUTION

Most parts have critical, high tolerance surfaces. Caution must be taken to prevent damage to these surfaces during assembly. Protect exposed surfaces, openings, and ports from damage and foreign material. (Page 6-16)

CAUTION

When installing the needle bearing, the printed number end of the bearing cage must face the press pin. (Page 6-16)

CAUTION

Do not slide the piston through the housing farther · than necessary to install the second seal ring. Sharp edges on the servo-bore inside the housing can damage the first seal ring. Do not damage the bearing ring when sliding the servo piston back into the housing. (Page 6-18)

CAUTION

Ensure all parts are properly aligned. Damage to the swash plate or front cover will occur if the front cover is forced into position on the housing. (Page 6-20)

CAUTION

When applying pressure during r~moval of the end shield, use extreme care not to damage the machined recesses on the end shield and on the frame. (Page 6-25)

CAUTION

Extreme caution is necessary when reassembling the stator. Avoid chamfering coil packages during reassembly. (Page ' 6-30)

CAUTION

Do not alter the shims unless necessary. Decreasing or increasing the shim pack changes the running characteristics of the bevel gears and result in Z-drive damage or equipment failure. (Pages 6-34, 6-35, 6-36, 6-38, 6-40, 6-41, 6-42, 6-44, 6-45, 6-46, 6-47, 6-49)

Xl xii

CAUTION

Support input shaft free end to prevent internal component damage. (Page 6-34)

CAUTION

To prevent damage to equipment, a soft-jawed vise, cloth, or cardboard should be used to protect parts. (Pages 6-41, 6-49, 6-50, 6-52)

CHAPTER 1

GENERAL INFORMATION AND SAFETY PRECAUTIONS

1-1 INTRODUCTION.

1-1.1 GENERAL INFORMATION. The purpose of this manual is to provide specific instructions for the operation, maintenance, and repair of the Z-drive, Model 260! 370-H thruster (figure 1-1). The system is principally manufactured by Ulstein Maritime Ltd., 96 North Bend Street, Mayfair Industrial Park, Coquitlam, B.C.

V3K 6Hl Canada, tel: (604) 942-1100.

1-1.2 SAFETY PRECAUTIONS. Person nel involved with the installation, maintenance, and operation of the Z-dri ve shall comply with the U.S. Navy Safety Precautions for Forces Afloat, OPNA V 5100 Series. General and specific warnings and cautions are contained in the Safety Summary located in the -front matter of this manual.

1-2 EQUIPMENT DESCRIPTION.

The Z-drive is a right-angle drive power transmission, thru-huH mounted and steerable through 360 degrees. The Z-drive enables the helmsman to maneuver in and out of difficult passages and to precisely position the craft. Table 1-1 lists the principal characteristics for the Z-drive and its components.

-----r---- •

II

II

,I

" " " , I r-r--: \.--\ . , ~== , , ' _L_ ~ ,('"-

" n----.L---" /I

" I , ___ L---..s.

Figure 1-1. Z-Drive, Model 260! 370-H

S9241-B5-MMA-01O

Table 1-1. Principal Characteristics

Item Data

Propulsion Unit Manufacturer .. .............. .. ........ .... ............... ....... .. ... ... ........ .... ............... Ulstein Maritime Ltd.

Model .. ........ .... ......... .... ............... .... .... ...... .. ... ... .... ..•.... .... ..... ........ .... ............ ........ .. 260/370-H Rating .. ................. ...... ..... ... ..... ..... ...... ..... ...... ..... ........... ........................ 300 hp at 1800 rpm Gear Reduction ....... ... ................. .......... .......... .............. .... .... ................................ Overall 3:1 .

Propeller Speed ................. .............................. ..... .... .. ............ .. ............ . ..................... 600 rpm Propeller Diameter ......... . ... ... .. ...... ..... ... ... .... ..... .. ................ ..................... ..................... 42 in.

Steering Reduction (worm gear) ........................................................................................ 70:1 Steering ...................................................... ... ......................... ... Electro-hydraulic power pack Steering Speed .............. .......... .... .. ............................................................... : ...... .. 3 to 4 rpm Weight (propeller and nozzle ...... ........ .. .... .................... .......... .................................. 5100 lbs

Electric Drive Motor Manufacturer ......... ':'....................................................................... Weg, Motores S.A. Brazil Voltage ....................... ...... .. ........................... ... ........................................... ....... .... 230/460 V Horsepower Phases Rpm ............................................................................................................ . ;

Frame, NEMA ....................................................................... 256T (160 L/M interp.ational) Bearing .

Front Rear ........................................................................................................................... 6209Z

Hydraulic Pump Manufacturer ............ .. ... ... .... ... .... .. ............... ................. .... ..... .. ... .... .. ... .... ... Sundstrand Sauer Type .................................................. ;...................................... Medium-duty pump, variable displacement Drive .......................................... .. ............................................. ....................... Electric motor Displacement .......... .......................... ..... ............................ ........ 2.8 cu. in.jrev (56 cern/rev) Input Speed Max Rpm (full angle) Continuous Rpm .................................................................................... :

Input Shaft, Stand. Spline ........................................................................................ 15 teeth Pitch .. ........ ... .......... ...... .. ... .............. ................. .......... ..... ... .. ............ ..... ............... .. ........ 16/ 32 Weight .. ....... ... .. ... ............................................................................................ 73 Ibs (33 kg Max Pressure ............................................................................................ 5000 psi (345 bar Continuous ................................................................................................ 3000 psi (210 bar Case Pressure Max (cold start) ................................................................... 75 psi (5.2 bar Continuous .............................. ........... ........................................................... 25 psi (1.7 bar Temperature (at hottest point in transmission)

Max .... ....... .................. ......... ....... ................................................................ 2200F (1040Cl Continuous ..... ............................................................................................... 1800 F (82oC

Fluid Viscosity Limits SUS (cst) Optimum ...................... .. .... ......................................................................................... 70 (13 Min Continuous ................. ............... ....................... .. ... ... ..... .......... ........................... 55 (9.0 Min Intermittent .. ......... ......... ........................... ................ .......... .......... .. ........ .... ....... 47 (6.4 Max Continuous ...................... ..... .............. ....................... ...................................... 500 (110 Max Cold Start ........ ...................... ........... ................ ........ .................... .. ............ 7500 (1600 Charge Inlet Vacuum at Sea Level

Normal inHg .......................................... .. .................................................. 5 (0.8 bar abs) Cold Start ......... ... .................................................................................... 10 (0.7 bar abs

1-2

Table 1-1. Principal Characteristics (Continued)

Item Data

Electrical Displacement Control Manufacturer ...... ... .. ... ... .......... ... ...... .................... .... .... .............. ... .............. Sundstrand Sauer Model ............. .... ..... .................................. .... ..... .. ............ .... ... ........... .... ....... ...... MCV 105 A Type .. ,..... ................ ...... .. ......... .. .... .. .. .. .. ... ..... ........... .. .... ... .... .......... ..... . Single coil, oil filled Fluid ... .... ....... .......... .................. .... . ..... ........... .. ...... ........... .... ... Mobil DTE 24 or equivalent Fluid Temperature Operating Range ... ...... ... .......................... -40 to 2500 F (-40 to 121oC)

Hot Oil Shuttle/Relief Valve Manufacturer ... ...... ......... ... ................ ......... ... .. ............. .. ................ ....... ... .. . Modular Controls Model No. . .................................................... :...................................................... MCD 10538 Seal Material...... .................... .... .. .......... ........ ..... ....... ..... ................ ...... .... ..... ............ Buna N Pressure Range (max) .. ... ... ........ ........... ........... ................ .... ....... ... ............ . ... ........... 5000 psi Relief Pressure Range (max) .. .. ........ ........•...... .... .......... .......... ............................. .... 1000 gsi Operating Temperature Range ..... ...... .......... ................. .......... .... .......... ...... ... . _400 to 250 F Operating Media ............ .......... .......... ........ ..... ... ..... ... ...... .. Gen. hydraulic fluid MlL-H-5606

Suction Line Filter (submerged) · .

Manufacturer .................. •... .................................................................... ..... Hydro-Craft, Inc.

Model No. . .....•....•................ ..........•.. ................. ..•....... ........•........... :....................... HA-FS-30 Gpm ........... .......................................................... : .. ......•....... ...... .. ... ;

Thread ......... .•.. .... .•......... ............ ............. ........... ........ ... .. .... ....... ... ................... 1-1/2-in. NPT Filtering Area ........................................................................................................ 240 sq. in.

Weight ........ ..... ...... .•. ........ ........... .•.... .................................... .......... ....... ....... ................ .. . 1 lb Micron Rating .:

Heat Exchanger Manufacturer •.. ........... ... .................... .. ........... ........ .... ......... Thermal Transfer Products, Ltd Model No. ......... .... .... .. .... ...... ....... .. ...... ........ ..................... ... ... .... ............. ............. B-701-A4-T Number of Passes Connection ................................................................................................................ 1.5 NPT Operating Pressure

Tubes ........ ........... ........ ................ ... ....... .... .. ;.... ... ......................................... .... ........ 150 ps!

Shell .. ....... ..... .. ....... ....... ....... ....... ..... ;. ... ..... .... ............. ..... ...... .. .... ... ......................... 250 pSI

Test Pressure Tubes ...•....................................................................................... . ...... .... ........... ...... 225 psi Shell ..... ........ .............. ...... ............ ....... .. ....... .................. ..... ......... .... ........ ................. 300 gsi

Operating Temperature .. .......•.... ............ ....... ......... .... ................... ..•............ ................. 350 F

Dimensions Length .......................... . .. ...... ...... :...... ... ...... ............ .... ......... ..... .... ... ..................... .. .. 22.28 in.

Length Header ................................................. ........................................................... 3.30 in.

Shell Diameter 0.0 .......................... :....................................................................... 3.656 10.

Height with Bracket ...... ...... ..... ........... .. ........ ............... ................ ..... ....... .... .. ... ... .... .. 6.25 in.

Heat Energy Dissipation Rate Oil/ Water .... ... ........ .. ... .. ......... .... ........... ..... ...................... 1:1

Feedback Box Assembly Manufacturer .................................................................................. David Brown Gears, Inc.

Model No. ...................... .......................................... ................................... .... Radicon, AAM Type .. ...... .... .... ................... ....... .... . ..... .. .............. ........ ... ... .. .. .. Double shaft, single reduction Size Output Shaft Rotation .............. ...... .................. ... ... ... ...... ......... .... .. .... .. Left and right hand Gear Ratio ................... .... . ....... ...... ........... ..... ... ... ... ... ...... .. ..... ........ ... ........ . ......... .. .......... 70: 1

1-3

Table 1-1. Principal Characteristics (Continued)

Item Data

Piston Motor Manufacturer ................................................................................ .... .................... Cessna, Inc.

Model No. ................... ....... .. ...... ..... ........ .. ........ ... .... ................................................ MFH-504 Fixed Displacement ............. .. .... .. .......... ........ ........... ................... ........ ......... ............ 5.04 CID Max Speed ............................................................................... :. .............................. 1500 rpm Max gpm Approx. Rpm per Gpm ... ... ; ........................................................................................... ,... 44 Cont. Duty Pressure .................................................................... .. ........................... 2500 psi Intermediate Duty Pressure ...................................................................................... 3500 psi Peak Pressure ........... ............ ... ............... :............ .... ...... ........... ............... .. .......... ...... 3750 psi Torque at 1000 psi ................................................................................... Approx. 760 lb-in.

Torque at 3000 psi ............................................................................ .. ................. 2300 lb-in.

Torque at 3500 psi ............................................................................................... 2500 lb-in.

Shaft ...... ...... ............ .. .......... ........ .... ... ............. .... ........ ..... .... ........... ......... ... ... .. I-in., 15 teeth Mounting .............. .. ....................... .................................................................... SAE-B-2 bolt Weight ... .. .... ........ ..... .... .... ... ......... ... ............. .. ....... ........ ................ ..... ....... ... .... ............ .. 24 lbs

Propulsion Motor Manufacturer ... .. .................... ........... ...... ..................................... :. General Electric Company Type ........................................ ..... ............................ .... .............. :................................ CD4350 Rpm Voltage ....... .......... ............... ... ...... .... ...................... .. .... ... ............... .. ...... ... ................. 550 V dc Temperature Rise ...................... ........................................ .............................................. 800 C Insulation .. . ........ .............................. ....... .. ................... .... .......... .... .............. .. ............. Class F Mounting .................................. ..... ....... .................................. .... .... ....... .................. Horizontal Horsepower Cooling .................................. ........ ........................... ............ ....... External air to water heat exchanger Weight

Armature ................................................................................................................ 1100 lbs Motor ...... ..... ... .. ... ........ ... ... .. ... ....... ... .......... ... ............ ... .... .............. ........ .. .. ......... .. 3900 lbs

Wounding ....................................................................................................................... Shunt Duty ......... ....... ....... .. ..... ......... ........ :....... ....... ........ ... ..... .. .......... .................. .......... Continuous

Blower Manufacturer ................................................................................. General Electric Company Type Rpm Voltage Horsepower Phases Cycles

1-4

CHAPTER 2

OPERATION

2-1 INTRODUCTION.

This chapter provides detailed procedures to operate and maintain the Z-drive. Proper operation and lubrication of the Z-drive extends the service life of the equipmen t and reduces breakdowns.

2-2 ·PRE-START CHECKS.

a . Ensure the hydraulic reservoir is full.

The oil level should be visible in the upper section of the oil level sight gauge.

b. Ensure the shutoff valves on the pump inlet are fully open.

c. Ensure the reservoir cap is in place.

d. Ensure electrical power to the uni t is available; control power is supplied from MCC panel number 4 to the main · drive motors (port and starboard) and their respective power 'packs are energized.

e. Ensure electrical power to the electric drive motor is available.

f. Prior to starting the units, ensure the combilevers are in the neutral position at the control stations (figure 2-1).

CAUTION

It is important that the oil level is not too high nor too low since the oil expands during operation due to aeration and temperature rise.

g. Check the drive leg oil level with the dipstick. The level should be within the indicated range.

h. Check the propulsion motor as follows:

1. Ensure the bearings are sufficiently greased.

2. Check flexible coupling for housing tightness.

3. Ensure all terminal connections are tight and clean.

i. When the pre-operational checks are satisfactory, start the power pack unit and turn the combilever in lO-degree increments from neutral to port and starboard.

j. Observe the Z-drive position indi . cators of all stations; ensure all indicators show the same position. Repeat the procedure on the second operation station.

k. Check the hydraulic power pack unit for leaks on the pipe connections, tank covers, and valves.

I. Ensure that hydraulic valves are in the correct position.

WARNING

To prevent injury or death, ensure there are no divers near or around the Z-drives.

CAUTION

Ensure that the craft is safely moored to the pier when testing the Z-drives.

m. When permission is granted to test run the drive units, start the units and gradually increase then decrease speed and pass through the neutral position into reverse. Repeat this procedure for the remaining three stations.

n. Ensure the water flow through t he heat exchanger/ cooler is sufficient.

o. Ensure the blower filter is clean and unrestricted.

2-1

LIGHTS

i[~t101

S9241-B5-MMA-010

STATION-IN-CONTROL 01

PORT

BRIDGE

WING

AFT

PUsHBUTToNs----~~~~~~¥~lcONTROL

CONSOLE

ECR

OVERRIDE

KEY

LOCKS

r-------r-----r-----,---~----LIGHTS

PORT STSD STSD

FSTEERING PUMPs,lo Z-DRIVES 3rSTEERING GEAR ALARM SUMMARy3

PORT

INDICATOR

COMSILEVER

GREEN

.RED

2-2 o U T

MANEUVER MODE

T A o M E T E R

STEERING MODE

10 STEERING/ MANEUVERING STATION 3

Figure 2-1. Control Station

STSD

INDICATOR

STEERING

CONTROL

2-3 OPERATION.

There are two modes of operation for the Z-drive: steering and maneuver . The following paragraphs describe the two modes and the changeover between the two modes as well as the emergency operation whe~ the Z-drive is disabled due to damage or repair.

2-3.1 STEERING MODE. The steering mode is automatically selected whenever the main clutch is engaged, i.e., when the main engine thrust lever is moved to either the forward or reverse position. The steering mode can also be selected by depressing the steering mode pushbutton at the respective control station (figure 2-1). When in this mod~, the craft's direction is controlled by movmg the rudder stick in the required direction. The motion is limited to 35 degrees right or left rudder (figure 2-2).

2-3.2 MANEUVERING MODE.

NOTE

Should the main propulsion diesel engine clutch be trans ferred to neutral and then to the reverse position without selecting the maneuvering mode, the ' two Z-drives will rotate in opposite directions to assume the reverse home position. An abrupt change from forward to reverse or vice versa will cause the main diesel propulsion engine to reverse directions and the Z-drives to rotate to the appropriate home position.

a. Select the ,maneuvering mode by depressing the pushbutton at the respective operating station (figure 2-1) .

NOTE

Ensure the main engine clutch lever is in the neutral position and the clutch is disengaged.

b. Rotate the combilever in each direction; observe the Z-drive position indicator.

35° STBD.

(RIGHT RUDDER)

0 REVERSE

rHOME

_-I--=-' , 35° PORT

(LEFT RUDDER)

35° PORT l)/i \ ( 35° STBD.

(LEFT RUDDE~RIGHT RUDDER)

0° ~FORWARD

HOME POSITION

Figure 2-2. Forward and Reverse Home Position

c. With the Z-drive position indicator in zero degree:s position, push the combilever forward and observe the rpm indicator.

d. Repeat these steps for each station.

2-3.3 STATION-IN-CONTROL TRANS

FER. At the same time the station-in control is transferred between the control consoles, the Z-drive will transfer with the main propulsion diesel engine thrust control.

If the engine control room (ECR) takes control of the main propulsion diesel engine, the' Z-drive control is transferred from the present station-in-control to the pilothouse console. . The indication for both the ECR and pilothouse consoles will be illuminated.

Ensure the lever of the taking station is in the same or similar position to avoid abrupt steering changes when transferring control between stations.

2-4 LUBRICATION SYSTEMS.

There are two separate lubrication systems in the propulsion system. These consist of the drive leg lubrication system and the seal oil lubrication system.

2-3

2-4.1 DRIVE LEG LUBRICATION SYS

TEM. The drive leg of the propulsion unit is filled with lubricating oil to a point just above the level of the steering worm. The upper gear box and associated bearings are spray lubricated from the input shaft driven pump. Suction is taken from the bottom of the intermediate section and the oil passed through a distribution block located on the upper gear box. From there the flow is directed to the upper gear box spray input shaft thrust bearing, and the input shaft aft bearing. The oil returns under gravity to the drive leg intermediate section which acts as a reservoir. The system is protected by a pressure alarm contactor set to close at five psig and wired to give an alarm condition in the pilothouse. The system pressure should be between 15 and 80 psig. Proceed as follows to check the oil level of the drive leg.

a. The level can be checked using the dipstick located on the aft side of · the steering box. It is important that the oil level is neither too high nor too low.

During operation, the oil level will expand due to aeration and temperature rise;

however, this expansion is allowed for in the design of the unit.

1. IT the level is too high, the upper gear box will become immersed and will pressurize the drive leg. This will cause oil to be forced out through the filler breather.

Should this occur, the Z-drive should be shut down and · the oil permitted to cool.

Once the oil has cooled, the level should be corrected . The drive leg is drained by removing the plug in the bottom of the lower gear box.

2. If the level is permitted to drop too low, the worm gear will not receive sufficient lubrication. This will result in severe damage to the steering worm and gear.

2-4

CAUTION

Do not use heavier oil. Heavier oils will result in extreme power losses and higher temperature build-up.

b. The lubricant used in the propulsion unit is a light weight gear oil with a viscosity of 135 SSU at lOOoF. See table 2-1. "" '-10 t-

Table 2-1. Lubricant Chart

Item

Drive Leg Lubricat ing Oil

Seal Oil Header Tank

Feedback Assembly

Recommended Lubricants

Chevron-Universal Gear Lubricant 75W

Shell-Omala 68 Gulf-Gear Lube

HT75

Chevron-Universal Gear Lubricant 75W

Texaco - Marfak #3

~\Dr,'Li (p2..~ -:. Ise , ,>p 'I,) " ..,

c. The drive leg also functions as an oil cooler. The oil in the drive leg is circulated by the churning action of the gear set, shafts, and bearings. The oil temperature should not be allowed to rise above 1900 F. Temperature should be checked at the distribution block by means of a magnetic thermometer.

CAUTION

Do not allow the reservoir to run dry since the seals could be damaged and Bea water could enter the system.

2-4.2 SEA L 0 ILL U B RIC A T ION

SYSTEM. The drive leg incorporates two sealing systems that require lubrication:

the sealing arrangement for the propeller shaft (to exclude water from the lower gear box and to retain the drive leg lubricating oil) and the second at the bottom of the steering section to exclude water where the drive leg emerges from the leg center section. These two sealing systems are connected by a passage within the drive leg and lubricated from the header tank. The header tank provides a static head on the sealing system thus preventing the loss of lubricating oil or the entry of water to the drive leg. If excessive seal wear occurs, it is the seal oil not the lubricating oil that is lost or contaminated. A metering valve is supplied with the tank and should be adjusted to allow a flow of approximately 10 liters per day.

2-4.3 HYDRAULIC FLUID REQUIRE

MENTS. The ratings and performance data for the hydraulic pump and associated equipment is based on operating with good quality, petroleum-based fluids. Premium hydraulic fluids containing high quality rust, oxidation, and foam inhibitors are required .

Although fluids containing antiwear addi tives are not ,necessary for the satisf!,ctory performance of the hydraulic pump they are required for associated equipment. When used, the fluids must have good thermal and hydrolytic stability to prevent wear, erosion, and corrosion of the internal components. Where water contamination is likely due to condensation, operation in a damp environment, or ~plashing, a fluid with outstanding hydrolytic stability is recommended.

a. Hydraulic fluid must have sufficient visCQsity to maintain an oil film on operating surfaces. Selection depends on operating temperatures and conditions.

Table 2-2 lists recommended viscosities to maintain equipment life and efficiency.

b. Viscosity index improved (multi viscosity) fluids may noticeably shear down in service when used ·in hydrostatic trans missions. This will lower the operating viscosity below the originally specified value.

Hydraulic fluids with a minimum viscosity rating exceeding the lowest operational viscosity must be selected.

c. Fluid temperature affects the viscosity of the fluid and resulting lubricity and film thickness. High temperatures can also limit seal life, fluids may break down or oxidize at high temperatures, and cavita tion is more likely at high temperature .

Recommended limits for op e rating temperatures are tabulated in table 2-3.

Table 2-2. Fluid Viscosity Limits for Petroleum-Based Fluids

Series 30 Other Piston .

Units

Max Continuous SUS (cSt) 500

Optimum Vis-

(110) 500 (110) cosity SUS (cSt) 70 (13) 70 (13) .

Min Continuous SUS (cSt) 47 (6.4) 55 (9.0)

Min Intermittent SUS (cSt) 42 (5.0) 47 (6.4)

Table 2-3. Fluid Temperature Limits

Series 30

Continuous Limit Intermittent Limit

Other Piston Units

d. These temperature limits apply at the hottest point in 'the pump , which is normally the case drain. Cold oil will generally not affect durability 'of pump components , but may affect its ability to flow oil and transmit power. In general , cold starts may be made at a temperatures 300 F warmer than the pour point of the fluid. Some period of time may be required to initiate motor shaft movement , but the fluid will warm rapidly after this occurs. Operation of units at high speed without oil flowing may damage the uni t s and should be avoided.

2-5/ (2-6 Blank)

S9241-B5-MMA-OlO

CHAPTER 3

FUNCTIONAL DESCRIPTION

3-1…