Front Clutch

TM 10-3930-633-34

if the unit is equipped with loose needle bearings.

in the clutch piston for free movement. Check the

Assemble two seal rings in the front grooves.

orifice to make sure it is not plugged.

(10) Install the steel and the bronze thrust

( 2 ) Check the fluid passages for ob-

washers on the front of the secondary sun gear

structions. All fluid passages must be clean and

assembly. If the steel washer is chamfered, place

free of obstructions.

the chamfered side down.

(3) Inspect the clutch plates for wear and

scoring and check the plates for fit on the clutch

7-23. Front Clutch

hub serrations. Replace all plates that are badly

a. Disassembly.

scored, worn or do not fit freely in the hub

(1) Remove the clutch cover snap rings with

serratio ns.

a screwdriver, and remove the input shaft from

(4) Inspect the clutch pressure plate for

the clutch drum.

scores on the clutch plate bearing surface. Check

(2) Remove the thrust washer from the

the clutch release spring(s) for distortion.

thrust surface of the clutch hub. Insert one finger

(5) Inspect the needle bearing for worn

in the clutch hub, and lift the hub straight up to

rollers.

remove the hub from the clutch drum.

c. Assembly.

(3) Remove the composition and the steel

(1) Install new inner and outer seal rings on

clutch plates, and then remove the pressure plate

the piston.

from the clutch drum.

(2) Lubricate seals and install piston into

(4) Place the front clutch spring compressor

cylinder, being careful not to damage seal rings.

on the release spring. Position the clutch drum on

(3) Install the clutch release spring, and

the bed of an arbor press, and compress the

position the retainer on the spring.

release spring with the arbor press until the

(4) Install the tool on the spring retainer as

release spring snap ring can be removed (fig. 7-

shown in figure 7-28. Compress the clutch spring,

29).

and install the snap ring. While compressing the

spring, guide the retainer to avoid interference of

the retainer with the snap ring groove. Make sure

the snap ring is fully seated in the groove. When

new composition clutch plates are used, soak the

plates in automatic transmission fluid for 15

minutes before they are assembled.

( 5 ) Install the external tabbed waved

cushion spring. Then, install the composition and

the steel clutch plates alternately, starting with a

steel plate.

(6) Install the clutch pressure plate with the

bearing surface down. Then install the clutch

pressure plate snap ring. Make sure the snap ring

is fully seated in the groove.

(7) Check the free pack clearance between

the pressure plate and the first internal plate with

a feeler gage. The clearance should be 0.030-0.055

inch. If the clearance is not within specifications,

selective snap rings are available in the following

thicknesses: 0.060-0.064, 0.074-0.078, 0.088-

0.092 and 0.102-0.106 inch. Insert the correct size

snap ring and recheck the clearance.

(8) Install the thrust washer on the primary

Figure 7-29. Removing Front Clutch Snap Ring.

(5) Remove the clutch release spring from

sun gear shaft. Be sure the thrust washer is in-

the clutch drum.

stalled with the tabs of the washer away from the

(6) The piston can be forced out of the

sun gear thrust face. Lubricate all parts with

housing with air pressure. Place the nozzle

automatic transmission fluid or petroleum jelly.

against the clutch apply hole in the front clutch

Install the two center seal rings.

housing, and force the piston out of the housing.

(9) Install the rear clutch on the primary sun

See figure 7-30.

gear shaft. Be sure all of the needles are in the hub

7-28