0202_REV B_Port Main_Reduction_Gear_Annual_Inspection.docx

1.0 ABSTRACT

1.1 This item describes the inspection of the vessel's port main reduction gear and quill input shaft coupling diaphragm.

2.0 REFERENCES/ENCLOSURES

2.1 References:

2.1.1 T9241-AH-MMC-010 Technical Manual for Main Reduction Gear Assembly. (Available of board)

2.2 Enclosures:

2.2.1 Reduction Gear Inspection Forms

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity: One (1) each, Engine Room Lower Level.

3.2 Description: Main Reduction Gear / Mfr. Cincinnati Gear, Models: Port 26-0500-037000 SN 012.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES: None

5.0 NOTES: None.

6.0 NOT USED

7.0 STATEMENT OF WORK

7.1 All work to be accordance with reference 2.1.1 and inspection to be accomplished under direct supervision of a manufacturer authorized representative see paragraph 7.14 for source.

7.2 Visual inspection of normally loaded, active, thrust collar thrust cone contact. Document “as inspected” contact radial length (2.125 inched theoretical), evidence of heat, and uneven contact or wear condition.

7.3 Preform a visual inspection of the Kopflex coupling faces and hardware. Perform a shear-wave NDT inspection of the Kopflex coupling as directed by the Reduction gear Cincinnati Representative.

7.4 Feeler gage inspect thrust collar to input pinion shoulder gap. (“A” of enclosure 2.2.1.)

7.5 Feeler gage inspect forward side of thrust collar to 2-piece retaining ring clearance. (“B” of enclosure 2.2.1). Has thrust collar displaced metal from 2-piece retaining ring?

7.6 Inspect gap between forward side of thrust collar and one piece-retaining ring from uniform gap. (“C” of enclosure 2.2.1.)

7.7 Record any discoloration or built up of “baked oil” on outside diameter or back face of thrust collar or retaining rings.

7.8 Visually inspect retaining ring “tack” welds if present. Check retainer for evidence of moving forward. Check for retaining screws. Record the length of the shoulder on the input pinion that extends past the back face of the solid retaining rings. (“b” of enclosure 2.2.1.)

7.9 Feeler gage inspect “total” thrust cone axial clearance.

7.10 Inspect diaphragm for quill shaft input coupling. Utilizing a bore scope for the inspection.

7.11 Record general condition of main and PTO gear meshes.

7.12 Record general condition relative to rust.

7.13 Conduct inspection as required by regulatory bodies for both port and starboard reduction gears. MSC Rep., Chief Engineer, and ABS Surveyor to witness inspection.

7.14 Upon completion of inspection, reinstall covers with new gaskets and necessary new fasteners. All bolting to be coated with "Anti-seize" compound prior to reinstallation.

7.15 Manufacturer's Representative:

7.15.1 CST-Cincinnati are as follows:

Rob Rye, Ken Lawrence VP Sales & Marketing rrye@cst-c.com 513-527-8631(phone) 513-527-8620 (fax)

Ken Lawrence Manager, Spare Parts klawrence@cst-c.com

8.0 GENERAL REQUIREMENTS: None Additional

USNS LENTHALL

(TAO 189)

CONTRACT NO. N32205-20-4009

0203 - 1

Enclosure 2.2.1

Enclosure 2.2.1

PORT REDUCTION

“Currently the Upgraded Thrust Collar configuration is only incorporated on the following ships. USNS Kaiser and Grumman –(Port REDGEAR)

(-.xxx) indicated the one piece retaining ring overhangs the two piece retaining ring

0.026 PTO End

0.000 Thrust Collar End

Inspection consist of visually verifying that all (16) hex head bolt tack welds are present and

STBD REDUCTION

(-.xxx) indicated retaining ring overhangs input pinion end face

Enclosure 2.2.1 image1.jpeg image2.jpeg