TM-9-2320-343-10

TRUCK, CARGO, 8X8 M985A4 W/WINCH AND M985A4 W/O WINCH

TECHNICAL MANUAL; OPERATOR'S MANUAL

OCTOBER 2008

TM-9-2320-343-10 - Page 124 of 1128

NOTE

•

The M983A4 LET is not equipped with a self-recovery winch, but is

equipped with a manually-operated hydraulic selector valve to supply

hydraulic power to the heavy-duty winch.

•

The M984A4 is equipped with a self-recovery winch, but does not

have a manually-operated hydraulic selector valve.

Any vehicle (see notes above) may also be equipped with a self-recovery winch (3) and a

manually operated hydraulic selector valve (4).

The main hydraulic system includes the material handling cranes (5) on the M977A4

(shown), M985A4, and M985A4 GMT as well as the main fuel pump on the M978A4, and

load handling system on both the M1120A4 LHS and M1977A4 CBT.

FLUID SYSTEM

Pump (1) mounted on the rear of engine provides the fluid power to operate the power

steering (2).

1

8

5

4

10

12

2

9

11

3

7

6

Figure 2.

Fluid power for operating the self-recovery winch (3) and crane (4) is provided by a hydraulic

pump (5) driven by the power take-off (PTO) mounted on the transmission.

A manually-operated selector valve (6) is used to activate either the self-recovery winch (3),

crane (4), fuel tanker dispensing components (M978 only), or load handling system (LHS)

on M1120 LHS and M1977 CBT.

Operation on the crane (4) is controlled from the control panel (7) at the rear of the vehicle.

Both hydraulic pumps (1 and 5) share the same reservoir (8).

END OF WORK PACKAGE

TM 9-2320-343-10

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