0202_A_ Reduction Gear Clutch and Brake Inspections Rev 1_Specification.doc

USNS Grasp

( TARS 51 )

1.0 ABSTRACT

1.1 This item describes the requirement to perform maintenance of Port and STBD main engine brake and clutches.

2.0 REFERENCES

2.1 Reduction Gear Tech manual. NAVSEA S9241-AJ-MMM-010 MAIN PROPULSION GEAR AND CLUTCHES

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity/Description

3.1.1 Location: Main Machinery Room (3-53-0), Quantity: Four (4) Drive Clutches Description: Eaton designed drive Clutches, Type 14VC1000.

3.1.2 Main Machinery Room; Port and STBD David Brown type 2R 84” Gearbox, Serial 11512604 including Eaton designed drive clutch, Type 14VC1000.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES:

4.1 ABS Surveyor.

4.2 Lubricants.

5.0 NOTES

5.1 The contractor and all subcontractors, regardless of tier must consult the General Technical Requirements (GTR) to determine applicability to this work item. In performance of this work item, the contractor and all subcontractors regardless of tier must comply with the requirements of all applicable GTRs including but not limited to GTRs 1-7, 22, 23, 28, and 29. GTRs can be obtained from the following URL: http://www.msc.navy.mil/instructions/pdf/m470016.pdf

5.2 The contractor and all subcontractors, regardless of tier, are advised to review the other Work Items under this contract to determine their effect on the work required under this Work Item. Many of the definitions relating to the performance of this Work Item are found in Work Item 001.

5.3 The contractor shall comply with all requirements of equipment tag-out program as established by COMSCINST 3540.6, as amended, section 15.2.2, Engineering Operations and Maintenance Manual. The Chief Engineer is to administer the program. Prior to the start of work, the contractor shall contact the MSCREP and / or the Chief Engineer to coordinate the implementation of the tag-out program for the entire performance period of this item. The prime contractor shall be responsible for compliance by both prime and subcontractor personnel.

5.4 All work specified in this item shall be in accomplished under the guidance and supervision of the Manufacturer’s Representative.

5.5 Tech manual instructions need to be followed, including the installation of the "come-home" or shipping bolts to support the assembly. If not, the quill shaft can drop and damage the oil seal on the shaft.

6.0 QUALITY ASSURANCE REQUIREMENTS:

6.1 The OEM Technical Representative shall submit two (2) copies of a Final Field Trip report to the MSCREP detailing all conditions found, as found/as released clearances, corrective actions taken, parts renewed (include OEM identifying P/N’s) and any recommended future repairs.

6.2 All work must be accomplished in accordance with ABS rules and to the satisfaction of the ABS Surveyor.

6.3 All Inspections listed in Section 7.3 shall be done in the presence of ABS Surveyor, MSCREP and CHENG.

7.0 STATEMENT OF WORK:

7.1 Arrangements/Outfitting:

7.1.1 Notify CHENG when Tech Rep is on-site. With Ships Force assistance operate both reduction Gears and identify all oil leaks.

7.1.2 Provide all labor, material(s) and special equipment. Make all removals and restorations. Remove and replace all interferences, rig and unrig, stage and unstage, make all disassemblies and subsequent reassemblies, provide and operate equipment, and supply all services and assistance to accomplish the following work. Material(s), unless specifically stated as Government Furnished Material (GFM) shall be supplied by the contractor.

7.1.3 Provide complete protective covering around reduction gears while system is open to protect reduction gears to allow no contaminates/foreign debris in work area.

7.1.4 Provide the services of Original Equipment Manufacturer (OEM) Technical Representative per Section 7.7 to accomplish the below listed work and testing.

7.2 Clutch: Using technical manual section 4-3.4 INSPECT BRAKES AND CLUTCHES and CLUTCH AND PINION INSPECTION Table 6-6 provide all labor and materials to perform the complete disassembly and subsequent midterm inspection of Main Propulsion Engine brake, clutch and pinion inspections.

7.2.1 Temporarily open, drain and disassemble each clutch.

7.2.2 Temporarily remove Roto Seals. Dissemble bearing caps, remove spanner nuts, lock washers and bearings.

7.2.3 Clean all parts, and inspect parts for wear. Provide a condition survey of each. Inspect brake assemblies insure proper torque. Inspect bearing assemblies.

7.2.4 Disconnect the 1A/1B and 2A/2B Main propulsion engine from the gear box shafting.

7.2.5 Renew and balance the clutch assemblies to include; all air tubes, Air Bladder, tension pins, torque bars, springs, clutch bearing, sleeves, oil seals, clutch drum, clutch hub and lock nuts using CFM.

7.2.6 Replace all gaskets, soft parts including air line grommets, spanner washers and snap rings. Re-fill with OEM recommended oil.

7.2.7 Re-assemble and check alignment, re-torque in the presence of the OEM rep.

7.2.8 Reconnect propulsion engines to the gearbox.

7.3 Inspection/Testing: All inspections and testing shall be accomplished in the presence of ABS, MSCREP and Chief Engineer.

7.3.1 Inspection: The Manufacturer’s Representatives shall accomplish all inspections. All inspections and testing results shall be submitted to MSCREP via CFR.

7.3.2 The ABS Surveyor, the ship’s Chief Engineer and Port Engineer shall accomplish the final inspections, with Technical Representative’s in attendance. Contractor to coordinate with ABS scheduling of all inspections and testing.

7.3.3 Operational test the clutches after the overhaul and spin the gears using the turning gear while accomplishing a gearbox inspection. Operate all equipment during dock trials and sea trials. Ensure the tech rep is present during the dock trails and sea trials.

7.4 Painting and lagging: Paint all new & disturbed areas to match surrounding paint scheme.

7.5 Markings: Renew any missing tags, plates as necessary.

7.6 Manufacturer Representative: Provide the services of a recognized Technical Representative to oversee disassembly and repairs/testing and the procurement of repair parts (other than paragraph 4.0) as designated in this Work Item.

Known Sources:

Clutch and Brake:

Eaton Corporation, Airflex Division, Cleveland, Ohio 44144 POC: Ed Luehring, (216) 634-8225

Goldman Engineer & Technical Services LLC. POC: Robert Goldman, (216) 262-2087

8.0 GENERAL REQUIREMENTS:

8.1 All work specified in this item shall be accomplished under the guidance and supervision of the Manufacturer’s Certified Field Service Engineers.

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