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TM 5-2420-222-34
14-3.
HYDRAULIC PUMP ASSEMBLY MAINTENANCE (Con’t).
c.
CLEANING AND INSPECTION
WARNING
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective
goggles and gloves, and use only in a well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open flame
or excessive heat. The solvent's flash point is 100°F-138°F (38°C-59°C). If you
become dizzy while using cleaning solvent, Immediately get fresh air and medical
help. If solvent contacts eyes, Immediately wash your eyes and get medical aid.
1.
Clean all metal parts with dry cleaning solvent. Dry thoroughly with clean, dry rags.
2.
Inspect roller bearings (see TM 9-214).
3.
Inspect hydraulic pump housing for cracks and breaks.
4.
Inspect hydraulic pump housing for scoring and excessive wear. Using telescoping gage, measure inside
diameter of bore where eight discharge packings and valve seats were removed. Measurement must read 1.385-
1.387 in. (35.179-35.230 mm).
5.
Inspect hydraulic pump housing oil seal bore for excessive wear. Using telescoping gage, measure inside
diameter. Measurement must read 2.011-2.021 in. (51.080-51.334 mm).
6.
Inspect hydraulic pump housing bearing bore for excessive wear. Using telescoping gage, measure Inside
diameter. Measurement must read 3.3745-3.3755 in. (85.7123-85.7377 mm).
7.
Inspect eight hydraulic pump housing piston bores. Using telescoping gage, measure inside diameter.
Measurement must read 0.9637-0.9643 in. (24.4780-24.4932 mm).
8.
Inspect eight hydraulic pump housing Inlet valve bores. Using telescoping gage, measure Inside diameter.
Measurement must read 0.9995-1.0005 in. (25.3873-25.4127 mm).
9.
Inspect eight hydraulic pump housing outlet valve bores. Using telescoping gage, measure Inside diameter.
Measurement must read 0.6245-0.6255 In. (15.8623-15.8877 mm).
TA701552
14-17
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