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![]() C2, TM 9-2815-213-34
0.185/0.215 inch through drive gear.
i. Remove pressure regulator cap (28, fig. B-10
g. With new gasket (3) over dowels in pump body,
lockplate (27), spring (26), plunger (29) and shim (25)
position scavenger body to lubricating oil pump body,
from bore.
engaging pump gears. Secure with lockplates and
capscrews (32 and 33), lock capscrews in plate with lock
3-25. Cleaning
tangs.
Clean all components in accordance with instructions
h. With new gasket (13) over dowels, position
contained in paragraph 2-5
pump cover (20) to lubricating oil pump body, engaging
pump gears; secure with lockplates and capscrews (18
3-26. Inspection
and 19). Lock capscrews in place with lock tangs.
a. Refer to general inspection procedures
i. With dial indicator, check for 0.0035/0.0075 inch
clearance of pump drive shaft.
b. Inspect pump drive gear. Replace pump if teeth
j. Position cover plate (16) on cover body secure
are chipped, cracked, scored or worn smaller than 2.397
with socket head capscrews (15). Center punch around
inches outside diameter.
screw heads to lock in cover.
c. Inspect drive shaft, replace pump if shafts scored
k. Position pressure regulator plunger, shim and
or worn smaller than 0.8740 inch outs diameter.
spring (25, 26 and 29) in pump body, secure with cap
d. Inspect idler shafts, replace pump if shafts are
and lockplate (27 and 28).
scored or worn smaller than 0.8750 inch outside
l. Lubricate pump body freely with lubricating oil,
diameter.
OE-10, drain oil, and cover openings with tape to prevent
e. Inspect all bushings for distortion and wear
entry of foreign material.
replace pump if bushings are worn larger than .8750' inch
m. Install tube assemblies (suction and aerator) on
inside diameter.
lubricating oil pump to permit installation of complete unit
f. Check gear pockets. If finished surfaces are
during engine assembly. Reverse steps a., b., and c.,
damaged or pocket inside diameter is worn larger than
2.4105 inches or if depth is worn deeper than 1.252
inches, replace pump.
3-29. installation
g. Inspect pressure regulator valve, replace if
a. Refer to paragraph 2-llm, and reverse removal
damaged. Check for burs or scratches on slide plunger.
procedures to install pump.
b. Check pump drive gear backlash as follows:
3-27. Repair
(1) Attach dial indicator to block, place indicator
No repair procedures beyond
those
specified
in
arm on gear teeth as shown in figure 3-19.
(2) Rotate gear by hand to advance position and
set indicator at zero. Back gear to retard position and
3-28. Assembly
note indicator reading. Check indicator reading against
specified limits in repair and rebuild standards (para. 3-
a. Press idler shaft (30) into scavenger body (2)
181). If reading is outside limits specified pump gear train
until shaft protrudes 1.935/1.965 inches from bottom
must be replaced.
surface to pocket.
b. Position idler gear (31) on scavenger idler shaft
c. Press lubricating oil pump driven gear (6) with
drill oil hole on main shaft (7) until shaft protrudes
0.590/0.620 inch through gear. Insert shaft through pump
body (9).
d. Press scavenger pump driven gear (6) on main
shaft and maintain 0.002/0.004 inch clearance between
gear and body.
e. Press lubricating oil pump drive gear (6) on drive
shaft until drive end of shaft protrudes through gear
1.455/1.485 inches. Insert long end of shaft.
f. With convex (numbered) side of pump drive gear
(17) up, press gear onto shaft until shaft protrudes
Figure 3-17. Drive gear backlash check.
3-10
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