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SECTION 2 - PROCEDURES
2. Using a soft mallet, tap a new wiper seal into the
applicable cylinder head gland groove. Install a new
wear ring into the applicable head gland groove.
Figure 2-6. Poly-Pak Seal Installation
Figure 2-7. Wiper Seal Installation
3. Place a new o-ring and back-up seal in the applica-
ble outside diameter groove of the cylinder head as
shown in the following illustration.
Figure 2-8. Head Seal Kit Installation
4. Install a washer ring onto the rod, then carefully
install the head gland on the rod, ensuring that the
wiper and rod seals are not damaged or dislodged.
2-8
Push the head along the rod to the rod end, as
applicable.
5. Carefully slide the piston spacer onto the rod.
6. If applicable, correctly place a new o-ring and back-
up rings in the inner piston diameter groove.
7. Using suitable protection, clamp the cylinder rod in
a vise or similar holding fixture as close to the piston
as possible.
8. Carefully thread the piston on the cylinder rod hand
tight, ensuring that the o-ring and back-up rings are
not damaged or dislodged.
9. Thread the piston onto the rod until it abuts the
spacer end and install the tapered bushing.
Figure 2-9. Piston Seal Kit
NOTE: When installing the tapered bushing, the piston and
mating end of the rod must be free of oil.
WHEN REBUILDING THE LIFT CYLINDER, APPLY LOCTITE #242
TO TA P E R E D B U S H I N G B O LT S , T H E N T I G H T E N B O LT S
SECURELY. REFER TO TABLE 2-1, CYLINDER COMPONENT
TORQUE SPECIFICATIONS FOR PROPER BOLT TORQUE VAL-
UES.
– JLG Sizzor –
3120791
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