TM 55-1730-201-12
4 . H a n d P u m p , F l u i d S t r a i n e r , a n d B y - P a s s V a l v e .
Section IV. OPERATION UNDER USUAL CONDITIONS
19. GENERAL.
Instructions in this section are published for the
information and guidance of personnel responsible
for the operation of this equipment. It is essential
that the operator knows how to perform every opera-
tion of which the equipment is capable.
20.
a.
OPERATING INSTRUCTIONS.
WARNING
Do not operate maintenance platform
more than 500 pounds on the platform.
Raising Upper Structure Assembly.
with
(1) Place the maintenance platform in the de-
sired location and depress the lever (1, figure 3) of
the immobilizing jacks to the locked position.
WARNING
Never use the maintenance platform unless
the two immobilizing jacks are in position
and the hydraulic cylinder safety lock is
installed.
(2) Close the by-pass valve (6, figure 4) by
6
turning the handle in a clockwise direction.
WARNING
Never use the platform in a raised position
without the hydraulic cylinder lock in-
stalled.
(3) Operate the pump handle (7) until the plat-
form attains the desired height, then install the
hydraulic cylinder lock (20, figure 1) on the hy-
draulic barrel (24).
WARNING
Use handrails when ascending or descend-
ing the steps.
b. Lowering Upper Structure Assembly.
(1) Remove
the hydraulic cylinder lock (20,
figure 1) from the hydraulic cylinder barrel (24).
(2) Open the by-pass valve (6, figure 4) b y
turning the valve handle in a counterclockwise di-
rection.
(3) Release
to maneuver the
immobilizing jacks (13, figure 1)
maintenance platform.
