OPERATION OF MEDIUM WRECKER (Contd)
For heavy pulls, install field chocks (15). Perform the following:
Remove field chocks (15) from storage area at left rear of wrecker body.
For direct pulls, install chocks (15) facing the load in left and right rear chock brackets (13) below
bumperettes. Insert pin (16) through bracket (13) and yoke (17) to secure each field chock (15) in place.
For indirect pulls, install field chocks (15) in left side and rear brackets (13) for left side pulls or in right
side and rear brackets (13) for right side pulls.
Dig two 12 in. (30 cm) holes at spade end (14) of chocks (15). Insert chock spade ends (14) in holes.
Start engine (para. 2-12).
Place transfer case shift lever (8)
Unlock safety latch (11) and
push transfer case power takeoff lever (10)
back to engage.
Place transmission selector
lever (7) in 1-5 (drive).
increase engine rpms to the proper
range when the PTO is engaged.
Pull out hand throttle control
(1) and set engine speed between 1250
and 1300 rpm as indicated by tachometer
switch (5) if operation is at night and tactical
(11) Turn on amber warning light
switch (6), if required, and if tactical