JLG 1850SJ Service And Maintenance Manual page 321

NOTE: Apply JLG Threadlocker (P/N 0100011) to tapered bushing
bolts.
10. 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.
Figure 5-45. Tapered Bushing Installation
11. Tighten the capscrews evenly and progressively in rota-
tion to 30 ft-lb (41 Nm).
12. 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.
b. Tap each space once; this means the tapered bush-
ing is tapped 3 times as there are 3 spaces between
the capscrews.
Figure 5-46. Seating the Tapered Bearing
13. Re-torque capscrews evenly and progressively in rota-
tion to 30 ft-lb (41 Nm).
3121619
SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
INSERTING ROD OFF-CENTER CAN DAMAGE PISTON AND CYLINDER BARREL
SURFACES. USE EXTREME CARE WHEN INSTALLING CYLINDER ROD, HEAD,
AND PISTON.
NOTE: Apply locking primer and medium strength (Blue) Locking
14. Clamp barrel securely and support rod. Insert piston end
into barrel cylinder. Do not damage or dislodge piston
O-ring and seal ring.
15. Continue pushing rod (21) in barrel (2) until cylinder
head (8) can be inserted into barrel cylinder.
Compound (JLG P/N 0100011 or equivalent to capscrews.
16. Secure cylinder head (8) and washer ring (5) with eight
capscrews (4).
17. Install two counterbalance valves (3) with new O-rings in
valve block. Torque to 50-55 ft-lb (67-75 Nm).
3*
3*
2
21
Figure 5-47. Rod Assembly Installation
8
5
4
5-69