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 TM 55-1905-223-24-1
CAUTION
Capscrews (35) are SAE grade 8. If any capscrew must
be replaced, use SAE grade 8 only.
d. Install lockwashers (34) and hex head capscrews (35) to oil pump cover (33). Tighten to 70 ft-lb (95 N m).
e. Check the pump gear shaft (12) end clearances with a dial indicator. The minimum is: 0.0045 inch (0.114
mm), and the maximum is: 0.0085 inch (0.216 mm). If specifications are not met, check for dirt or debris in
the gears.
CAUTION
The idler shaft must be installed so that the oil hole in
the shaft is farthest from the pump body to permit
lubrication of the large (compound) gear bushing.
f. Install idler shaft (14) in housing (31).
CAUTION
The side of the thrust bearings with the oil grooves must
touch the large (compound) gear for proper lubrication.
g. Install thrust bearing (15) and large (compound) gear (17) on to shaft (14).
CAUTION
The flat side of the retainer must be nearest the rear
thrust bearing for proper operation.
h. Install access cover (18), thrust bearing (21), and retainer (22).
CAUTION
The capscrew (23) is a special fatigue related capscrew.
Install the proper capscrew or the pump will fail.
i. Install capscrew (23). Tighten to 125 ft-lb (170 N m).
j. Measure the large (compound) gear (17) to drive gear (26) backlash by holding one gear firm and moving
the other gear. The minimum is: 0.006 inch (0.15 mm), and the maximum is: 0.010 inch (0.25 mm). If
backlash is not to specifications one or both of the gears must be replaced.
k. Measure the large (compound) gear end (17) clearance. The minimum is: 0.008 inch (0.20 mm). The
maximum is 0.032 inch (0.81 mm). If clearance is not within specifications, check for dirt or debris in the
gears.
3-69
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