Cleaning, Inspection, and Replacement

TM 10-3930-621-34

c. Oil Pump.

(6) Install sealing ring (16) and needle bearing

(10) on input shaft (8).

(1) Remove oil pump assembly from transmission

(7) Place assembly in arbor press. Apply pressure

assembly (para 6-3 a ).

to input shaft (8), making sure forward cylinder (3) does

(2) Refer to figure 6-3 and disassemble as follows:

not bind.

(3) Remove screws (13), bolts (14), and lock

(8) Install large snap ring (2) to secure for- ward

washers (12 and 15) holding pump support to collector

cylinder in place and slowly release pressure of arbor

ring (11). Separate support from ring.

press.

(4) Remove oil seal (7) and packings (8 and16).

(9) Install disc and drum assembly on converter

(5) Remove collector ring (11) bushing if worn or

housing (para 6-5 c).

damaged.

c. Transmission.

6-4. Cleaning, Inspection, and Replacement

(1) Unless otherwise noted, refer to figure 6-6

a. Clean all parts with cleaning compound, solvent

when assembling the transmission gear train.

(P-S-661). Blow out all passages and dry all

(2) Install screen (23), spring (24), and plug (25) in

components with compressed air.

sump of transmission case (32).

b. Inspect bearings, packing, splined shafts, gears,

(3) Coat all gears and bearings with oil (OE 10)

and attaching parts for wear and damage.

and make sure they rotate freely.

c. Inspect screen for clogging or damage.

(4) Install the output gear and shaft as follows:

d. replace all gaskets, packing, and oil seals.

(a) Install expansion plug (20).

e. Replace worn or damaged parts as authorized.

(b) Holding and alining two ball bearings

f. Replace entire oil pump if gear bushings and

(17) and output gear (19) in gear box, install

housing are excessively damaged

output shaft (18) through the three parts.

g. Refer to paragraph 1-4 for Transmission Repair

and Replacement Standards.

transmission case and secure with bolts (13) and

6-5. Assembly

lock washers (14).

a. Oil Pump.

(d) Install output flange (11) and oil seal (12). Output

(1) Refer to figure 6-3 and assemble as follows:

shaft must be installed with internal splines to

(2) Install new preformed packings (8 and 16) and

outside of gear case.

oil seal (7).

(5) Install idler gear and shaft as follows:

(3) Lubricate all parts with engine oil (OE 10). See

(a)Install two needle bearings (35) in idler gear (34).

lubrication order (LO 10-3930-621-12).

(b) Install idler shaft (36) in idler gear assembly and

(4) Install pump support on collector ring (11) and

install the unit in transmission case.

secure with lock washers (12 and 15), bolts (14) and

screws (13).

marked on retainer, during disassembly.

(5) Install pump assembly on converter housing

(d) Position new gasket (37).

(para 6-5 c ). Use new gasket (28).

(e)Install retainer cap (38) and secure with bolts (40)

b. Disc and Drum Assembly.

and lock washers (39), noting pin (41) position.

(1) Refer to figure 6-7 and assemble as follows:

Machined reliefs in idler retainer must be in the

(2) Install reverse disc assembly (18), reverse

down position so that oil in retainer will drain into

piston (17) and sealing ring (6), and reverse cylinder (15)

housing.

and sealing ring (16) in drum (22).

(6) Install reverse gear and shaft as follows:

Caution: Make sure cylinder and piston do not bind

(a) Install bearing (26) and secure with retaining ring

in plate assembly or on pins (21).

(27).

(3) Holding reverse cylinder in place, install large

(b)Holding reverse gear (2) in transmission case,

retaining ring (2).

install reverse shaft (44), from drum assembly side,

(4) Turn drum (22) over and install four drive pins

through bearing and gear. Secure gear to shaft with

(21) and 24 springs (19) in drum. Install forward disc

retaining ring (3).

assembly (20) and position forward piston (17) with

Caution: Retaining rings must be seated

sealing ring (6) in drum.

firmly for both bearing (26) and reverse gear (2) or

(5) Install input shaft (8J on forward cylinder (3)

with

eight

screws

(9)

destructive shaft movement will result.

(c)Install lubricated needle bearings (42 and 43) on in

and out side of reverse shaft (44).

6-9