JLG 1850SJ Service Manual - Manual (Page 203)

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
3121619 – JLG Lift – 5-33
3. Install backup ring (16), O-ring (15), and backup ring (14)
to inside groves of piston (17).
4. Install wear ring (20), two seals ring (19), and lock rings
(18) to outside grooves of piston (17).
NOTE: Piston and mating end of rod must be free of oil when
installing tapered bushing.
5. Install piston assembly (17) and tapered bushing (23) on
rod (26).
NOTE: When installing the tapered bushing, piston and mating
end of rod must be free of oil.
6. Apply JLG Threadlocker (P/N 0100011) to tapered bush-
ing capscrews. 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.
7. Tighten the capscrews evenly and progressively in rota-
tion to 60 ft-lb (81 Nm).
8. 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.
9. Retorque the capscrews evenly and progressively in
rotation to 60 ft-lb (81 Nm).
14
15
16 17
18
19
20
19
18
Figure 5-58. Piston Assembly
Figure 5-59. Tapered Bushing Installation
Figure 5-60. Seating the Tapered Bearing