TM-9-2815-205-24

6V53/6V53T ENGINES, DIESEL WITH CONTAINERS; MODEL 5063-5299, MODEL 5063-5392, MODEL 5063-5393 AND MODEL 5063-539L

TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE

FEBRUARY 2013

TM-9-2815-205-24 - Page 570 of 856

REPAIR OR REPLACEMENT

NOTE

Check valve only requires one lapped side. Turn over to utilize unused side.

New parts do not require lapping prior to use. Following list of used parts may require lapping: check valve

cage (Figure 9, Item 16), bushing (Figure 9, Item 19), valve spring cage (Figure 9, Item 13), and spray tip

(Figure 9, Item 5). Lap components using following procedure:

WARNING

Compressed air used for cleaning purposes will not exceed 30 PSI (207 kPa). Use

only with protective equipment (goggles, face shield, gloves, etc.). Failure to comply

may result in injury to personnel.

a.

Clean lapping block set (Figure 9, Item 33) with compressed air. Do not use cloth or other material for

this purpose.

b.

Spread 600 grit dry lapping compound on lapping block (Figure 9, Item 33).

CAUTION

Do not press on part. Apply only enough pressure to keep part flat on block. Keep part

flat on block at all times.

c.

Place part flat on lapping block (Figure 9, Item 33). Using a figure-eight motion, move part back and

forth across block.

d.

After five passes, draw part across clean piece of tissue placed on flat surface and clean lapping

compound from it.

e.

Inspect part and continue lapping if necessary. Do not lap excessively.

TM 9-2815-205-24

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