JLG M450 ANSI Service Manual - Manual (Page 160)

SECTION 5 - HYDRAULICS
5-8 – JLG Lift – 3121127
11. Assemble the tapered bushing loosely into the pis-
ton and insert JLG capscrews (not vendor cap-
screws) through the drilled holes in the bushing and
into the tapped holes in the piston.
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 tapered
bushing with a hammer (16 to 24 oz.) and brass
shaft (approximately 3/4" in diameter) as follows;
a. Place the shaft against the cylinder rod and in
contact with the bushing in the spaces between
the capscrews.
b. Tap each space once; this means the tapered
bushing is tapped 3 times as there are 3 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 Figure 5-9., Piston Seal Kit Installation)
Figure 5-10. Tapered Bushing Installation
Figure 5-11. Seating the Tapered Bearing
Figure 5-12. Poly-Pak Piston Seal Installation