JLG 660SJ Service Manual - Manual (Page 147)

SECTION 5 - HYDRAULICS
3120840 – JLG Lift – 5-15
4. Using an appropriate brass drift, drive the rod attach
pin through the aligned bushings. Secure pin with
attaching hardware.
5. Remove caps from cylinder hydraulic lines and cor-
rectly install lines to cylinder as previously tagged
during Removal.
6. Remove boom prop and overhead crane. Activate
hydraulic system.
7. Using all applicable safety precautions, operate the
boom functions. Check for correct operation and
hydraulic leaks. Secure as necessary.
8. Check fluid level of hydraulic tank and adjust as nec-
essary.
Tower Telescope Cylinder Removal
1. Place machine on a flat and level surface, with main
boom in the horizontal position. Shut down engine
and prop the boom See Figure 5-18., Tower Tele-
scope Cylinder Removal.
2. With the aid of an assistant, manually override the
Plunger Valve with a pry bar, and from Ground Con-
trol, using auxiliary power, extend the tower tele-
scope out to gain access to fly attach pin.
3. Remove lower cover plate.
Figure 5-18. Tower Telescope Cylinder Removal