TM-9-2320-272-10

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; OPERATOR'S MANUAL

SEPTEMBER 2004

CHANGE 2

TM-9-2320-272-10 - Page 232 of 481

TM 9-2320-272-10

2-131

(16)

To rig the load:

(a)

Attach utility chain (10) to lifting

shackles (11) or pintle hook of load (12).

NOTE

M939A2 vehicles do not have front anchors.

(b)

If load (12) is very heavy or deeply

mired, install snatch block (16) or combination of

snatch blocks (16) to increase winch pulling power.

To rig a snatch block (16):

1.

Unwind enough cable (14) to

reach the load (12) and back to rear winch. Rig

cable hook and chain (3) to rear bumperettes (4).

2.

Turn hook (15) to right. Lift up

rear of snatch block (16) and open support link

(13). Insert cable (14). Lift up rear of snatch block

(16) and lower and lock support link (13) to hook

(15). Return hook (15) to original position.

3.

Rig hook (15) to load (12).

(17)

Release brakes, transmission, and transfer

case of vehicle being retrieved.

.

WARNING

.

Direct all personnel to stand clear of winch

cable during winch operation. A snapped winch

cable may result in injury or death.

NOTE

If using the wrecker’s rear winch for self-

recovery, release parking brake and set

spring brake override.

(18)

To pull load:

(a)

Position lever (7) to LOW for heavy

loads or HIGH for light loads.

(b)

Push tensioner switch (9) down to

engage tensioner.

2-24. OPERATION OF MEDIUM WRECKER (Contd)