Section XII. OVERHAUL (REBUILD) OF MAIN CONTROL VALVE ASSEMBLY

Section XII. OVERHAUL (REBUILD) OF MAIN CONTROL VALVE ASSEMBLY

(11) Remove screw (25), cover (26), extender

5-52. Description

valve (29), springs (30 and 31), and ball (32).

Refer to paragraph 2-11 for description of the main

c. Items Removed from Rear of Control Valve

control valve assembly.

Assembly.

5-53. Disassembly

(1) Remove screws (61 and 63), and remove

(fig. 5-82)

throttle valve retainer (64). Do not remove ad-

NOTE

justing screw (62) from retainer.

All items not covered in a through c below

(2) Remove throttle valve (44) from control

were removed from the transmission as

valve body (42).

outlined in paragraph 5-6, steps 4 through

Caution: Rear cover (60) is spring

13 (fig. 5-4 through 5-13). No further

loaded and must be held compressed while

disassembly of those parts is required.

removing screws.

a. Items Removed from Bottom of Control Valve

(3) Remove seven screws (59) from rear cover

Assembly.

(60), and remove cover.

CAUTION

(4) Remove trimmer valve (58), springs (56

Valve retainer (6) is spring loaded and

and 57), plug (55), spring (54), trimmer stop (53),

must be held compressed while removing

and spring (52).

screws.

(5) Remove manual selector valve (45).

(1) Place main control valve assembly (3) on a

(6) Remove shift plug (47) and shift valve

table with top side down. Remove two screws (4)

(46) from valve body (42).

and lockwashers (5) from retainer (6), and remove

(7) Remove shift plug (48) and shift valve

retainer, spring (7), and valve (8).

(49) from valve body (42).

(2) Remove six screws (9).

(8) Remove shift plug (50) and flow valve

(3) Remove bottom cover (10), detent spring

(51) from valve body (42).

(11), and ball (12).

5-54. Cleaning

b. Items Removed from Front of Control Valve

Refer to paragraph 5-2 for cleaning recom-

Assembly.

mendations.

(1) Remove two screws (13).

CAUTION

5-55. Inspection and Repair

Inhibitor valve body (21) is spring loaded

Refer to paragraph 5-3 for general inspection and

and must be held compressed while

repair recommendations. Refer to paragraph 6-3

removing screws.

and table 6-3 for general wear limits information.

(2) Remove screw (20), four screws (22), and

5-56. Assembly

washers (23) and remove inhibitor valve body (21).

(Fig. 5-82)

(3) Drive two dowel pins (19) from valve body

NOTE

(21), and remove two washers (16), two springs

All items not covered in a through c below

(15 and 17), and two inhibitor valves (18) from

valve body.

are installed as outlined in paragraph 5-58,

steps 43 through 53 (fig. 5-126 through 5-

(4) Remove two springs (14 and 27) and two

1 3 6 ) . No overhaul (rebuild) of such

blocker plugs (28) from front cover (34).

CAUTION

components is required or recommended.

NOTE

Front cover 34 is spring loaded and must

be held compressed while removing screws

It is absolutely essential that springs are

not interchanged. Refer to table 6-2.

(24 and 25).

(5) Remove three screws (24).

a. Items Installed at Bottom of Control Valve

(6) Remove front cover (34) but do not

Assembly.

remove setscrew (33) from cover.

(1) Place main control valve assembly (3) on

(7) Remove plug (35) from cover (34).

a table with top side down. Install manual selector

valve (45) into valve body (42).

(8) Remove spring (36) and shift valve (38)

from control valve body (42 ).

(2) Install detent ball (12) and spring (11) in

(9) Remove spring (37), main regulator valve

valve assembly, and install bottom cover (10).

(40), and front governor valve (41) from valve

(3) Install six screws (9). Tighten screws to 24

body (42).

to 36 pound-inches torque.

(10) Remove throttle regulator valve (39) and

(4) Install spring (7) and regulator valve (8)

spring (43) from valve body (42).

on retainer (6). Install two screws (4) and lock-

5-42