JLG 1850SJ Service Manual - Manual (Page 227)

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
3121619 – JLG Lift – 5-57
5. Install Spacer (16) on Rod (7) with screw hole facing
toward piston end. Align hole in spacer and rod. Apply
locking primer and medium strength (Blue) locking
compound JLG P/N 0100011 or equivalent to socket
head capscrew (10). Install capscrew.
6. Install backup ring (13), washer ring (14), and backup
ring (13) in piston (11).
7. Install seal (12), and two wear rings (11) on piston.
8. Using suitable protection, clamp cylinder rod in a vise or
similar holding fixture as close to piston as possible.
9. 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.
10. Thread piston on rod until it aligns with spacer end and
install tapered bushing.
11. Apply JLG Threadlocker (P/N 0100011) to tapered bush-
ing bolts. Assemble the tapered bushing loosely into the
piston and insert capscrews through the drilled holes in
the bushing and into the tapped holes in the piston.
12. Tighten the capscrews evenly and progressively in rota-
tion to 30 ft-lb (41 Nm).
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 con-
tact with the bushing in the spaces between the
capscrews.
15
16
23
Figure 5-103. Cylinder Head and Spacer Installation
11
11
14
13
Figure 5-104. Piston Seal Kit Installation
Figure 5-105. Tapered Bushing Installation