JLG 41EL Service Manual - Manual (Page 32)

SECTION 2 - SERVICE PROCEDURES
2-14 – JLG Lift – 3120782
6. When the rod assembly is ready to be installed into
the tube, liberally apply an anti-seize lubricant to the
head outer surface, especially the static seal.
7. Next dip the entire rod assembly into hydraulic fluid
and stuff this assembly into the tube. Watch the
seals as they pass over the rod port (if visible) to be
sure they are not nicked or cut.
8. Install the head until the retaining ring seats in it’s
groove.
Installation
1. Remove the plastic plugs from the cylinder.
2. Pull rod out of cylinder approximately 3 ft.
NOTE: The following step is easier done with two people,
one to slide the cylinder into the mast, the other to
guide the rod into the cylinder block at the top of the
mast.
3. Slide the cylinder into the mast and install the rod
into the cylinder attach block.
4. Apply Loctite #222 (purple) to the setscrew securing
the lift cylinder rod to the sheave wheel anchor block
at the top of mast section-2.
5. Install the setscrew in the cylinder attach block at the
top of the mast, coat the threads of the setscrew with
Loctite (RC/#640-blue) before tightening.
6. Install the cylinder mount at the bottom of the mast
using the four (4) 1/2" bolts. Re-shim to eliminate
any side clearance to prevent any strain on the sides
of the mast when the bolts are tightened.
7. Install the one (1) 5/16" bolt, securing the mast cylin-
der to the cylinder mount.
8. Connect the hydraulic fittings and lines, (new fittings
should be used).
9. Slide the mast together (stowed position) from the
top of the mast.
10. Stand machine upright on it’s base wheels.
11. Connect the hydraulic line fittings at the pump.
12. Check oil level in the hydraulic oil reservoir, add oil
to fill line, if necessary.
13. Install the ground station (pump) cover.
14. Set-up machine for operation and cycle mast (up
and down) approximately 3 ft. to 4 ft. a few times.
15. Check the hydraulic oil reservoir again, add oil to the
fill line.