JLG E300 Service Manual - Manual (Page 112)

SECTION 5 - HYDRAULICS
5-16 – JLG Lift – 3120772
8. Using suitable protection, clamp the cylinder rod in
a vise or similar holding fixture as close to piston as
possible.
9. Carefully thread the piston on the cylinder rod hand
tight, ensuring that the o-ring and back-up rings are
not damaged or dislodged.
10. Thread piston onto rod until it abuts the spacer end
and install the tapered bushing.
NOTE: When installing the tapered bushing, piston and mat-
ing end of rod must be free of oil.
WHEN REBUILDING THE STEER, TOWER LIFT, LEVEL CYLINDER,
UPPER LIFT CYLINDER, OR E.A.R. CYLINDERS, APPLY LOCTITE
#242 TO TAPERED BUSHING BOLTS, THEN TIGHTEN SECURELY.
(SEE TABLE 5-1 ANDTABLE 5-2 TORQUE SPECIFICATIONS).
11. Assemble the tapered bushing loosely into the pis-
ton and insert JLG capscrews (not vender cap-
screws) through the drilled holes in the bushing and
into the tapped holes in the piston using loctite
#242.
12. Tighten the capscrews evenly and progressively in
rotation to the specified torque value. (See Table 5-1,
Cylinder Head and Tapered Bushing Torque Specifi-
cations.)
13. After the screws have been torqued, tap the bushing
with a hammer (16 to 24 oz.) and brass shaft
(approximately 3/4” in dia.) as follows;
a. Place the brass shaft against the tapered bush-
ing on the spaces between the capscrews.
b. Tap each space once; this means the tapered
bushing is tapped three times as there are three
spaces between the capscrews.
14. Retorque the capscrews evenly and progressively in
rotation to the specified torque value. (See Table 5-1,
Cylinder Head and Tapered Bushing Torque Specifi-
cations.)
15. Remove the cylinder rod from the holding fixture.
16. Place new guide locks and seals in the applicable
outside diameter grooves of the cylinder piston. (see
Table 5-17., Piston Seal Kit Installation)
Figure 5-17. Piston Seal Kit Installation
Figure 5-18. Tapered Bushing Installation
Figure 5-19. Seating the Tapered Bearing