Clark GEX20 - Preparation for Disassembly

Group 32, Tilt Cylinders
32-4-2 • Tilt Cylinder Overhaul SM 765, Nov ’06
Preparation For Disassembly
IMP
O
RTANT
Overhaul tilt cylinders only in a clean, dust-
free location, using clean tools and equip-
ment. Dirt or grit will damage the highly-
machined surfaces and will result in leakage
or premature failure of components. Cleanli-
ness of the hydraulic circuit is extremely
important to the proper operation and main-
tenance of the system. Be sure the work area
is clean.
1. Before disassembly, the exterior of the tilt cylinder
should be carefully cleaned to remove all dirt and
grease accumulation.
2. Be sure all hydraulic oil has been removed from the
cylinder. Stroking the piston rod will help force the
oil out.
3. Before starting disassembly, the tilt cylinder should
be carefully examined to determine if there is any
evidence of external damage.
Disassembly
The tilt cylinder can be held by clamping the base end or
the barrel in a vise while disassembling.
IMP
O
RTANT
Do not use excessive force when clamping on
the barrel.
1. Remove the gland with a hook wrench. Carefully
pull the gland assembly from the cylinder tube and
slide it off the cylinder rod.
2. Carefully pull the rod, piston assembly, and gland
from the cylinder barrel. Remove gland from rod.
WARNING
!
The use of compressed air to blow the piston
out of the barrel is not recommended. High-
pressure air can result in piston and rod
being ejected at high velocity (explosively),
causing severe injury to personnel and prop-
erty damage.
3. Remove and discard the piston packing and wear
rings from the piston.
4. Remove and discard the rod U-cup seal, O-ring, and
piston rod wiper from the gland.
O-Ring
Piston Seal
Wear Ring
Dust Wiper
Rod Wiper
O-Ring
O-Ring + Backup Ring
DU Bush