Transmission and Torque Converter, Cleaning, Inspection and Repair

TM 10-3930-630-34

(e) Turn drum over and remove screws

(13), lock plates (14), retaining ring (15), rear cylinder

(16), piston (19), and reverse disc (20). Remove

packings (17 and 18). Remove pins (21) from pressure

plate (22). Remove roller bearing (23) from rear

cylinder.

12-11. Transmission

and

Torque

Converter,

Cleaning, Inspection and Repair

a. Wash all metal parts with cleaning solvent,

(Fed. Spec. P-D-680) and dry thoroughly.

b. Blow out passages with compressed air.

c. Inspect bearings, seal ring, splined shafts and

gears for wear or damage and replace if damage is

severe.

d. Inspect sump screen for clogged or damaged

screen and replace if necessary.

TA067494

e. Check drive discs, pistons and drum for

Figure 12-11. Removing output shaft and gear.

excessive wear or score marks. Replace if necessary.

f. Check piston rings making certain they are free

(a) Remove screws (52, fig.

12-6)

in piston grooves.

holding output shaft retainer (53) to housing.

g. Replace all seals and packings.

(b) Remove output shaft (57) and

retainer (53), while holding output gear (60) inside gear

12-12. Transmission

and

Torque

Converter,

box. It may be necessary to tap the output shaft from

inside the clutch housing to facilitate removal.

Reassembly and Installation

(c) Remove output gear (60).

a. Reassembly.

(11) Drum assembly which was removed in (6)

(1) Assemble the drum assembly:

above can now be disassembled.

(a) Check etched or scribed marks on

CAUTION

pistons and cylinders. Align marks before assembling

clutches.

The front and rear clutch assemblies

(b) Install the reverse disc (20, fig. 12-

are balanced. Two lines are etched

12), piston (19), new packings (17 and 18) and install

on rear clutch cylinder to indicate

roller bearing (23) and rear cylinder (16). Make certain

correct align-ment of the cylinder

the rear cylinder and the piston do not bind in the drum

with the piston. One etched line is

or on the dowel pins. Install large retaining ring (15)

used to indicate correct alignment

holding cylinder and assembled parts in place.

for forward clutch cylinder with the

(c) Turn the drum assembly over and

piston. If etched marks cannot be

install the springs (12), forward disc (11), piston (10),

located, punch or scribe marks on

new packings (7 and 8) and the front cylinder (5).

the cylinders and piston to insure

(d) Install bearing (9) in turbine shaft (6).

proper alignment during reassembly.

Place the entire assembly in an arbor press. Apply

(a) Place the drum assembly in an arbor

pressure on the turbine shaft, making certain the

press. Remove seven screws (4, fig. 12-12), apply

cylinder does not bind in the drum or on the dowel pins

pressure on the turbine shaft (6) until the cylinder is

(21). Install retaining ring (1), lock plates (3) and screws

depressed enough to remove the large retaining ring (1)

(2). Install screws (4) to secure turbine shaft.

from the drum. Remove turbine shaft (6). Remove

(e) Check to be certain the front cylinder

roller bearing (9).

is properly seated and release arbor press pressure.

(b) Remove screws (2) and lock plates

(3) from cylinder.

(2)

Assemble the output gear and shaft:

(c) Slowly release the arbor press

NOTE

pressure and remove front cylinder (5) making sure it is

Apply a coat of lubricant (OE/HDO) to

kept in alignment to prevent binding in the drum. If

all gears and bearings before

binding occurs, tap cylinder lightly with a rawhide

installation.

hammer until it is released. Remove packings (7 and

8).

(a) Position output gear (60, fig. 12-7) in

(d) Remove piston (10), forward disc (11)

transmission case and install output gear shaft

and springs (12). Take care that piston ring is not

damaged or binding during removal.

12-9