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TM 10-3930-644-14&P
TOPIC 3. TILT CYLINDER
A. DESCRIPTION
5. Remove capscrew and pin retainer (Fig 3.1).
The action of the tilt cylinder is a straight line motion.
Any misalignment between the cylinder and the piston
6. Insert drift pin (Fig 3-2) in hole provided for it in
will cause binding, rapid wear of packing and the
tilt cylinder mounting pin, and remove pin. The
packing gland, rapid wear of piston rod and packing, and
tilt cylinder may then be lifted from location.
will tend to break the weld on the cylinder case.
C. TILT CYLINDER DISASSEMBLY
The welded section is designed to hold hydraulic
pressure and should not be called upon to sustain any
1. With tilt cylinder firmly secured in bench vise,
bending action due to misalignment.
loosen capscrew on yoke and remove yoke from
plunger rod. Record number of turns required to
To remove the tilt cylinder for replacement or repair, the
remove yoke.
following procedure is recommended:
2. Remove packing gland and.  pry out packing
B. REMOVAL
and wiper. Also remove O Ring, back-up ring,
and nylon pellets.
The tilt cylinders are mounted under the toe plate and
floor plate.
To remove tilt cylinders the following
3. When replacing O Ring, and back-up ring,
procedure is recommended:
lubricate  with  hydraulic  oil  and  do  not
overstretch when sliding over edge of packing
1. Set hand brake. Operate tilt cylinder lever and
gland.
put mast in forward position.
Turn ignition
switch to OFF position. Secure mast in position
4. When replacing plunger packing seal, remove
with a chain hoist.
items in Steps 1 and 2 in this paragraph, and
then withdraw complete piston and plunger
2. Remove cotter pin and yoke pin.
assembly from cylinder tube.
5. Remove spacers from plunger rod. An 0 Ring is
CAUTION
installed in the end spacer only.
Protect tilt cylinder rod from truck
frame and handling mishaps.
CAUTION
3. Remove toe plate and floor plate.
Do not attempt to remove piston
from plunger rod.
They do not
4. Disconnect hydraulic lines at tilt cylinder.
separate.
Figure 3-2. Tilt Cylinder Pin Removal
Figure 3-1. Tilt Cylinder Anchor Pin
3-185

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