TM-5-3805-254-34

TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

MARCH 1993

TM-5-3805-254-34 - Page 277 of 727

TM 5-3805-254-34

6-34.

ONTROL VALVE REPAIR.

This Task Covers:

a. Disassembly

c.

Assembly

b. Cleaning and Inspection

Initial Setup:

Equipment Conditions:

Materials/Parts:

• Control valve removed (see paragraph 6-14).

• Hydraulic fluid (Item 7, Appendix B)

Tools/Test Equipment:

• Grease (Item 10, Appendix B)

• General mechanic's tool kit

• Dry cleaning solvent (Item 23, Appendix B)

• Field automotive shop set

• One retaining pin

General Safety Instructions:

• Dry cleaning solvent Is flammable and must not be used near open flame.

Use only in a well-ventilated area.

• Compressed air used for cleaning or drying purposes, or for clearing restrictions, should never exceed 30 psi (207

kPa).

a.

DISASSEMBLY

CAUTION

Seven balls In oil transfer plate will fall free If transfer plate and held firmly together when

handling.

1.

While holding control valve body (4), separator

plate (6), and oil transfer plate (1) together as an

assembly, place on work surface with modulator

valve body (5) facing upward.

2.

Remove three screws (2) and modulator valve

body (5) from oil transfer plate (1).

3.

Mark position of spring ring (3) in modulator

valve body (5) for assembly.

TA703868

6-151