TM-9-2320-342-10-1

TRUCK, WRECKER, 8X8 M984A4

TECHNICAL MANUAL; OPERATOR'S MANUAL

OCTOBER 2008

TM-9-2320-342-10-1 - Page 176 of 1428

MAIN HYDRAULIC SYSTEM - Continued

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.

M984A4 WRECKER SPECIFIC MAIN HYDRAULIC SYSTEM

Fluid power for operating the heavy-duty winch (1), self-recovery winch (2), crane (3), and

retrieval system (4) is provided by a steering/tensioner pump (5) mounted on the power

take-off (PTO) on the transmission.

TM 9-2320-342-10-1

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