Front Pump

TM 10-3930-633-34

manual lever and shaft from the transmission

7-20. Front Pump

case.

a. Disassembly.

(6) Tap the toggle lever sharply toward the

(1) Remove the stator support attaching

rear of the case to remove the plug and pin.

screws and remove the stator support. Mark the

(7) Remove the pawl pin by working the

top surface of the pump driven gear with Prussian

pawl back and forth. Remove the pawl and toggle

blue to assure correct assembly. Do not scratch

lever assembly, and then disassemble.

the pump gears.

(8) Remove the manual shaft seal and case

(2) Remove the drive and driven gears from

vent tube.

the pump body.

b. Assembly.

(3) Refer to figure 7-25 for a disassembled

(1) Coat the outer diameter of a new manual

view of the front pump. Inspect the pump body

shaft seal with sealer, then install the seal in the

housing, gear pockets and crescent for scores.

case with a driver.

(2) Install the vent tube in the transmission

case.

(3) Assemble the link to the pawl with the

pawl link pin, washer, and pawl return spring.

Assemble the toggle lever to the link with the

toggle link pin. Position the pawl return spring

over the toggle link pin, and secure it in place

with the washer and the small retainer clip. In-

stall the assembly in the transmission case by

installing the pawl pin and the toggle lever pin.

Figure 7-25. Front Pump.

Install the torsion lever assembly. Position the

(4) If the front pump housing bushing

spring on the torsion lever with a screwdriver.

requires replacement, refer the unit to depot

Make certain that the short side of toggle does

maintenance.

not extend beyond the largest diameter of the ball

(5) If any parts other than the stator sup-

or the toggle lever pin. Tap the toggle lever in or

port, bushings or oil seal are found defective,

our as necessary to center the toggle lever on the

replace the pump as a unit. Minor burrs and

ball.

scores may be removed with crocus cloth. The

(4) Install the manual lever and shaft in the

stator support is serviced separately.

transmission case. Position the detent lever on

(6) Bolt the front pump to the transmission

the shaft, and secure it with a nut. Tighten the

case with capscrews.

nut to 20-- 30 ft/lbs torque. Rotate the manual

(7) If the oil seal requires replacement,

lever to the rear of the case. Position the detent

install the oil seal remover shown in figure 7-26.

spring in the case. Hold the detent plug on the

Then pull the front seal from the pump body.

spring with a 3/16 inch socket wrench, then

depress the spring until the plug is flush with the

case. Carefully rotate the manual lever to the

front of the case to secure the plug. A piece of thin

walled tubing may be used to depress the plug if a

small socket wrench is not available.

(5) Position the ends of the parking pawl

operating rod in the detent lever and toggle lift

lever, and secure with the two small retaining

pins,

(6) Install a new seal on the downshift lever

shaft, then install the lever and shaft in the case.

Position the inner downshift lever on the inner

Figure 7-26. Removing Front Pump Seal.

end of the shaft with the mark 0 facing toward the

(8) Clean the pump body counterbore. Then

center of the case. Install the lockwasher and nut,

inspect the bore for rough spots. Smooth up the

then tighten the nut to 17 20 ft/lbs torque.

counterbore with crocus cloth.

(7) Check the operation of the linkage. The

linkage should operate freely without binding.

7-26