Control Valve Body

TM 10-3930-633-34

7-13. Control Valve Body

(6) Remove the main pressure oil tube first,

by gently prying up the end that connects to the

a. Removal.

main control valve assembly, then, remove the

(1) Drain the fluid from the transmission by

other end of the tube from the pressure regulator.

loosening the pan attaching bolts starting at the

Be sure to remove the tube in this manner.

rear of the pan and working toward the front.

Failure to do so could kink or bend the tube

When most of the fluid has drained from the pan,

causing excessive transmission internal leakage.

remove the remainder of the attaching bolts.

(7) Loosen the front servo attaching bolts

(2) Remove the pan and gasket. Discard the

three turns.

gasket. If the same fluid is to be used again in the

(8) Remove the three control valve body

transmission, filter the fluid through a 100-mesh

attaching bolts, and lower the valve body while

screen as it drains from the transmission. Re-use

pulling it off the front servo tube. Be careful not

the fluid only if it is in good condition.

to damage the valve body or the tubes.

(3) Remove the fluid screen retaining clip

b. Disassembly. During the disassembly of the

and the screen.

control valve assembly, avoid damage to valve

(4) Disconnect the hoses from the vacuum

parts and keep the valve parts clean. Place the

diaphragm unit. Remove the diaphragm unit

valve assembly on a clean shop towel while

using Snap-On Tool S8696-A. Do not use any

performing the disassembly operation. Do not

tools on the diaphragm housing, such as pliers,

separate the upper and lower valve bodies and

pipe wrenches, etc. Do not allow solvents to enter

cover until after the valves have been removed.

the diaphragm unit. Remove the pushrod.

(1) Refer to figure 7-15, and remove the

(5) Remove the small compensator pressure

manual valve.