RFC_033.doc

N32205-19-R-4017

USNS KANAWHA (T-AO 196)

REQUEST FOR SPECIFICATION CLARIFICATION

RFC 033

NAME OF CONTRACTOR:

SPECIFICATION ITEM NO.:

PARAGRAPH / SECTION NO:

1.1, 7.4.1, 7.5

TITLE:____ PORT AND STARBOARD MAIN ENGINE TECH ASSIST SUPPORT

QUESTION:

1.) Request the list of “Scheduled Maintenance” that the Government intends for accomplishment of both MPDE’s?

2.) Contractor requires clarification.

-Is the intention of work item 201 to only complete the Oil Flush on Two (2) main engines, and remove – overhaul – and reinstall Twenty (20) fuel injector assemblies? IF NOT- please revise and advise?

ANSWER:

1. The following are the maintenance items to be accomplished by a service order with the OEM.

1.1. Crankshaft Deflection Readings

1.1.1. Take and record “cold” crankshaft deflection readings both prior to and after completion (if required) of repairs in accordance with section 6-90 and 6-91 of Ref. 2.1.1.

1.2. Rocker Arm Assemblies

1.2.1. Disassemble the rocker arm assemblies to the extent necessary to inspect and measure the pins and bushings. Replace out of tolerance components (compensation for replacement parts to be made using a change order). Reassemble rocker arm assemblies.

1.3. Intake and Exhaust Valve Clearances

1.3.1. Check and adjust the tappet clearance of all twenty (20) intake and twenty (20) exhaust valves in accordance with section 6-58 of Ref. 2.1.1.

1.4. Fuel Injectors

1.4.1. Conduct shop overhaul of all twenty (20) fuel injectors and replace injector nozzle tips. Test, calibrate and adjust the spray pattern and operating pressure of all twenty (20) installed fuel injectors in accordance with sections 6-32.1 through 6-32.4 of Ref. 2.1.1. Assume that the following parts shall require replacement and are Contractor Furnished Material:

1.5. Final performance checks and adjustments of the pumps and rack settings shall be accomplished during dock and sea trials.

1.6. Cam Follower/Camshaft Timing Gear

1.6.1. Accomplish visual inspection of all camshaft gears, cams and cam rollers in accordance with sections 6-52.2 and 6-79 of Ref. 2.1.1.

1.7. Thrust Bearing

1.7.1. Measure and record engine thrust bearing clearance, in the presence of the Chief Engineer, Port Engineer, and the manufacturer’s technical representative.

1.8. Crankcase Door Gaskets

1.8.1. Remove and replace all twenty (20) crankcase inspection door gaskets.

1.8.2. Thoroughly clean gasket seating surfaces removing all traces of old adhesives prior to installing new gaskets.

1.9. Remove, disassemble, inspect, reassemble, and reinstall the mechanical overspeed mechanisms. The overspeed mechanisms are to be reassembled using new bearings, seals, gaskets, pins and o-rings.

1.10. Inspection/Test:

1.10.1. Perform electronic overspeed test per section 4.5 of reference 2.1.1

1.10.2. Perform mechanical overspeed test per section 6-24 of reference 2.1.1

1.11. Insulation/Lagging:

1.12. Carefully remove insulation and lagging pads as necessary to gain access to repairs. Hold for reinstallation. Reinstall all insulation and lagging pads removed during the performance of this work item, as original.

2. The contractor is to provide the material and labor to conduct the engine lube oil flush outlined in section 7.5 of WI 0201. The contractor is to provide rigging, crane, crating and transportation services for the injectors.

ATTACHMENT J - 8