TM 5-3825-229-14&P
5-12. OIL PUMP AND OIL PRESSURE REGULATING VALVE (cont)
a.
Removal (cont).
(5)
Remove screw (10) and washer (1 1) and slide pump drive gear (12) from shaft (16).
Remove oil pump gear and shaft (13) and plate (14).
b.
Cleaning, Inspection and Repair.
WARNING
Wear protective goggles when using the cleaning solvent. Avoid contact with the eyes. If
contact occurs, flush eyes with cold water for 5 minutes and seek immediate medical
attention. Dry cleaning solvent (PD-680) is both toxic and flammable. Avoid prolonged
breathing of vapors. Avoid skin contact. Use only in a well-ventilated area. Keep away
from open flame. Flash point of solvent is 138°F (59C).
(1)
Clean all pump parts with cleaning solvent (PD-680) and dry thoroughly.
(2)
Inspect gears (9 and 13) for scoring and damaged teeth. Inspect shaft of gear (13) for wear.
(3)
Inspect drive shaft housing in pump body and bearing (15) in plate for wear and scoring.
(4)
Install gears (9 and 13) in pump body (8). Rotate gears back and forth and check backlash.
Backlash should be within minimum of 0.003 inch (0.08 mm) and a maximum of 0.018
inch (0.45 mm).
(5)
Check clearance between ends of gear teeth and body. Clearance should be within a minimum
of 0.004 inch (0.010 mm) and a maximum of 0.007 inch (0.18 mm).
(6)
Check clearance between face of gears (9 and 13) and face of body. Clearance should be
within a minimum of 0.002 inch (0.06 mm) and a maximum of 0.006 inch (0.15 mm).
5-33
