TM-9-2815-205-24 Technical Manual for M113 Engine 6V53 6V53T Download
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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 0084 0084-10