MAINTENANCE OF FORKLIFTS - OD1660 - LESSON 1/TASK 1
(1) Hydraulic Tilt Cylinder.
The hydraulic tilt cylinder is a
double-acting cylinder mounted between the fork carriage and mast.
Two tilt cylinders are used on the truck. They are activated by the
control valve. They tilt the mast assembly forward or rearward. The
minimum forward tilt is 11 degrees and the minimum rearward tilt is
22 degrees.
(a) Removal, disassembly, assembly, and installation procedures
for all cylinders of the forklift are given in TM 10-3930-242-12 & 34
and will not be covered in this lesson.
WARNING
Before commencing work on the hydraulic tilt
cylinder, use supports to block up the mast.
Personal injury or death may result from a
falling mast.
NOTE
The Army model 200 and the Army model 222
cylinders are of identical construction and have
identical components.
The cylinder used on the
Army model 202 has slightly different internal
components, but the maintenance procedures are
similar.
The tilt cylinder for the Army Model
202 is illustrated in TM 10-3930-242-34P/2.
(b) There are two
tests
that
can
be
performed
on
the
tilt
cylinders; these are:
1 Packing Drag Test.
a With the cylinder placed in the horizontal position, fill
the rod end of the cylinder with oil.
b Open the head end of the piston to the atmosphere.
c With the rod end under no load except normal seal and
wiper drag, apply pressure to the rod of the cylinder and record the
maximum pressure reached before the piston moves.
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