OPERATING REAR SUPPORT LEGS
Before performing any maintenance on the platform, lower the front and rear
support legs or serious injury to personnel may result.
When lowering the support legs, make sure that feet and hands are clear of the
support leg foot as it nears the ground or serious injury to personnel may result.
When preparing to lower the rear support legs, ensure the ground surface texture
is strong/hard enough to support the rear support legs without sinking into the
ground. If extra support is required, place large pieces of lumber and/or steel plate
under the support legs.
a. Ensure semitrailer is on level ground, wheels are chocked, and trailer parking brakes applied.
b. Check bed height indicators (para. 2-7) for proper platform height. Proper height should be approximately 43
inches (109 cm). Perform adjustments as required (para. 2-19) to achieve correct height.
The following procedure applies to either rear support leg.
c. To lower rear support leg, proceed as follows:
(1) Release latch (1) and raise protective cover (2) to gain access to adjusting nut (3).
(2) If necessary, use 3/4-inch ratchet and 1-5/8-inch socket to turn adjusting nut (3) counterclockwise until rear
support leg (4) starts to lower.
(3) Remove ratchet from socket and install 1/2-inch speed wrench using 1/2-inch to 3/4-inch adapter. Turn
speed wrench counterclockwise until support leg foot (5) makes contact with the ground.
Ensure that socket head screw is positioned outboard and cover closes freely or
damage to equipment may result.
(4) Position adjusting nut (3) so that socket head screw (6) is outboard and does not interfere with bar (7) on
(5) Remove speed wrench, adapter, and socket and replace cover (2) over adjusting nut (3). Secure cover with
(6) Repeat steps (1) thru (5) of this procedure as required to lower other rear support leg.
2-70 Change 1