JLG 450A_AJ Series II Service Manual - Manual (Page 276)

SECTION 5 - HYDRAULICS
5-36 – JLG Lift – 3121290
7. Using suitable protection, clamp cylinder rod in a vise or
similar holding fixture as close to piston as possible.
8. Carefully thread piston on cylinder rod hand tight.
Ensure O-ring and back-up rings are not damaged or
dislodged.
NOTE: Piston and mating end of rod must be free of oil when
installing tapered bushing.
9. Thread piston onto rod until it aligns with spacer end
and install tapered bushing.
NOTE: Apply JLG Thread Locking Compound P/N 010011 to
tapered bushing bolts when rebuilding master, slave, lift,
and telescope cylinders.
10. Install bolts in tapered bushing using JLG Thread Lock-
ing Compound P/N 0100011. Torque to 5 ft-lb (6 Nm).
Figure 5-71. Tapered Bushing Installation
11. Remove cylinder rod from holding fixture.
12. Place new guide locks and seals in applicable outside
diameter grooves of cylinder piston. (See Figure 2-28.
Piston Seal Kit Installation.)
13. Position cylinder barrel in a suitable holding fixture.
INSERTING ROD OFF-CENTER CAN DAMAGE PISTON AND CYLINDER BARREL
SURFACES. USE EXTREME CARE WHEN INSTALLING C YLINDER ROD, HEAD,
AND PISTON.
14. Clamp barrel securely. Support rod and insert piston
end in barrel. Do not damage or dislodge O-rings and
seals.
15. Continue pushing rod into barrel until cylinder head
gland is inserted into barrel cylinder. Align marks made
during disassembly.
16. Apply locking primer and locking compound to eight
socket head bolts. Secure cylinder head and washer ring
with socket head bolts. Torque to 30 ft-lb (40 Nm).
Figure 5-72. Rod Assembly Installation