TM-9-2320-279-20-3

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 3 OF 3

TM-9-2320-279-20-3 - Page 137 of 615

TM 9-2320-279-20-3

Hydraulic System Maintenance Instructions (Cont)

9-12.

PRIMARY PUMP HYDRAULIC MOTOR CONTROL VALVE, BRACKET, AND

CABLE BRACKET REMOVAL/INSTALLATION (M978).

This task covers:

a. Removal

b. Installation

c. Follow-on Maintenance

INITIAL SETUP

Models

M978

Test Equipment

None

Special Tools

None

Supplies

References

None

Equipment Condition

TM or Para

Condition Description

TM 9-2320-279-10 Shut off engine.

TM 9-2320-279-12 Hydraulic reservoir drained.

Oil, lubricating, Item 32, Appendix C

Special Environmental Conditions

Tags, identification, Item 47, Appendix C

None

Personnel Required

General Safety Instructions

MOS 63S, Heavy wheel vehicle mechanic

None

a.

Removal.

NOTE

There are two kinds of control valves. Model A has the top mounting screw on the left side

of the top elbow. Model B has the top mounting screw on the right side of the top elbow.

Both valves are removed the same way. However, if one type of valve must be replaced by

the other type, the mounting bracket, valve lever, clevis pin, and cotter pin must be

changed also. Refer to TM 9-2320-279-24P for proper identification of parts.

(1)

Remove cotter pin (1) and pin (2) from valve lever (3) and clevis (4).

(2)

Loosen two nuts (5). Remove control cable (6) from cable bracket (7).

19-30

Change 3