JLG 1850SJ Service And Maintenance Manual page 315

9. Thread piston on cylinder rod hand tight. Ensure O-ring
and back-up rings are not damaged or dislodged.
NOTE: When installing the tapered bushing, piston and mating
end of rod must be free of oil.
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 5-32. Tapered Bushing Installation
11. Tighten the capscrews evenly and progressively in rota-
tion to 9 ft.lbs. (12 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 5-33. Seating the Tapered Bearing
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 JLG Threadlocker (P/N 0100011)
13. Retorque the capscrews evenly and progressively in
rotation to 9 ft.lbs. (12 Nm).
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 in barrel until cylinder head can
be inserted into barrel cylinder.
to capscrews.
16. Secure cylinder head and washer ring with eight cap-
screws.
17. Install two counterbalance valves with new O-rings in
valve block. Torque to 30-35 ft-lb (40-47 Nm).
Figure 5-34. Rod Assembly Installation
5-63