ARMY TM 9-2815-254-24
AIR FORCE TO 38G1-94-2
Check for excessive clearance between control rack (39) and bushing (45) that is press fitted into pump hous-
ing (19). To check for end play, hold pinion and measure movement of control rack. If wear on working area
of control rack and bushing is excessive and play is more than 0.012 in. (0.3 mm), replace control rack.
Check for excessive wear of gear teeth on control rack (39) and sleeve pinion (30). If backlash is more than
0.012 in. (0.3 mm), replace both control rack (39) and sleeve pinion (300).
Check that flange on plunger (24) is not damaged, refer to FIGURE 3-20. If damaged, replace plunger and
barrel as an assembly.
FIGURE 3-20. Checking Plunger and Barrel for Damage
Check cylinder sleeve (29, FIGURE 3-8) groove for damage or excessive wear. Replace if worn or damaged.
Check tappet (23) rollers, bushings, and pins for excessive wear, flaws, or peeling, refer to FIGURE 3-21.
If damage is found, replace tappet.
FIGURE 3-21. Tappet