Assembly - TM-10-3930-621-340112

TM 10-3930-621-34

KEY to fig. 6-11:

16.

Inching spool

1. Valve assembly

17.

Inching plunger spring

2. Bolt

18.

Inching plunger

3. Lock washer

19.

Oil seal

4. Bolt

20.

Regulator spring

5. Selector stop

21.

Regulator spool

6. Selector spring

22.

Bolt

7..Selector ball

23.

Plunger stop

8. Selector bushing

24.

Body assembly

9. Selector spool

25.

Gasket

10. Oil seal

26.

Inching stop

11. Retaining screw

27.

Gasket

12. Gasket

28.

Separator plate

13. Dump spring

29.

Gasket

14. Dump spool

30.

Cover

15 Inching spool spring

j. Check inching plunger and all spools for free

6-16. Assembly

operation.

a. Refer to figure 6-11 and assemble as follows:

k. Check all stops for proper installation. They must

b. Install regulator valve spool (21 ) and spring (20),

be installed with angled edges facing back of valve body.

and dump valve spool (14) and spring (13) in valve body

l. Position new valve body gasket (25) and separator

assembly (24).

plate gasket (27) on valve body assembly (24).

c. Place new gaskets (12) on regulator valve

m. Secure separator plate (28) to valve body

retaining screws ( 11 ) and, holding springs in place,

assembly (24) with bolts (4) and lock washers (3).

secure retaining screws in valve body assembly (24).

n. Position new valve cover gasket (29) on separator

d. Install spring (15) inside inching valve spool (16)

plate (28) and secure valve cover (30) on gasket with

and secure inside valve body assembly (24) with stop

bolts (2) and lock washers (3).

(26).

6-17. Installation

e. Install inching valve plunger spring (17) and

a. Attach transmission control valve assembly to

plunger (18) on secured inching valve spool (16). Make

transmission case with bolts and washers.

sure spring is firmly seated on spool, the secure plunger

b. Torque bolts 5 to 10 foot-pounds.

with stop (23).

f. Install new oil seal (19) to a snug fit around

Caution: Do not exceed 10 foot-pounds

plunger 118).

torque.

g. Install selector spool (9) in valve body assembly

Connect inching and selector control valve

(21) and secure with stop (5).

linkages.

h. Install new oil seal (10) to a snug fit around

6-18. Testing

selector spool (9).

Refer to paragraph 6-7 for testing procedures noting how

i. Install selector valve ball (7), spring (6), and

each valve is to function in the control system (para 6-

bushing

(8), making sure ball seats easily when

12).

positioning spool.

Section IV. INCHING CONTROL

6-19. Description

6-20. Removal

Inching operation is controlled by the inching pedal. The

a. Remove floor plates, toe plates (TM 10-3930-621-

pedal is installed on the same shaft as the brake pedal

12) and inching plate assembly (1, fig. 6-12).

and is connected to an actuating rod. The rod actuates

b. Remove cotter pin and clevis pin and disconnect

the inching valve plunger located in the transmission

master cylinder clevis from brake pedal shaft (10, fig. 8-

control valve assembly. The transmission and braking

3).

functions

are combined

to provide simultaneous

c. Disconnect inching pedal spring (19, fig. 6-12)

transmission disengagement and position braking.

and brake pedal spring (4, fig. 8-3).

d. Holding pin (8, fig. 6-12i and spring (9) in a

6-16