Inspection - TM-9-2815-213-340039

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

paragraph 2-6.

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

paragraph 3-24.

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

arm on gear teeth as shown in figure 3-19.

paragraph 2-7 are authorized.

(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

(fig. B-10)

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