JLG 4017 Service Manual - Manual (Page 44)

Boom
3.20 4017
4. Apply Loctite ® 242 to the wear pad mounting bolts
and install both left and right side wear pads and
bolts and both left and right bottom wear pads and
bolts. torque the side wear pads to 50 Nm (37 lb-ft)
and the bottom wear pads to 90 Nm (66 lb-ft).
5. Align the front two threaded holes on the hose
carrier with the front two holes (5) on each side of
the fourth boom section and install both bolts. Apply
Loctite
® 242 and hand tighten only.
6. Fasten the rear of the hose carrier (3) to the top rear
of the third boom section. Apply Loctite ® 242 and
torque both bolts to 90 Nm (66 lb-ft).
7. Start the machine and extend the boom out until the
middle set of holes (6) in the fourth boom section
align with access holes at the front sides of the third
boom section. Shut off machine.
8. Align the middle two threaded holes on the hose
carrier with the middle two holes on the fourth boom
section and install both bolts. Apply Loctite
® 242 and
hand tighten only.
9. Start the machine and extend the boom out until the
rear set of holes (7) in the fourth boom section align
with access holes on each side of the third boom
section. Shut off machine.
10. Align the rear two threaded holes on the hose carrier
with the rear two holes on the fourth boom section
and install both bolts. Apply Loctite
® 242 and torque
to 90 Nm (66 lb-ft).
11. Torque the middle two and front two hose carrier
bolts to 90 Nm (66 lb-ft).
12. Start the machine and retract the boom
completely.Shut the machine off.
13. Relieve any trapped pressure in the tilt hydraulic
system by using the handle provided or a 9mm
wrench and move the double nut on the side of the
main control valve tilt section back and forth. Repeat
on the auxiliary valve section.
14. Attach both tilt cylinder hoses from the hose carrier
to the tilt cylinder and tighten until wrench-tight. Mark
the hose fitting then tighten each hose firmly
1 to 1 1/2 flats.
15. Attach both auxiliary hoses from the hose carrier to
the auxiliary fittings on the bulkhead and tighten until
wrench-tight. Mark the hose fitting then tighten each
hose firmly 1 to 1 1/2 flats.
16. Bolt the auxiliary bulkhead onto the side of the boom
head. Apply Loctite ® 242 and torque to 50 Nm (37 lb-
ft).
17. At the rear of the boom, attach both tilt cylinder
hoses to the tilt hose carrier bulkhead fittings and
tighten until wrench-tight. Mark the hose fitting then
tighten each hose firmly 1 to 1 1/2 flats.
18. At the rear of the boom, attach both auxiliary hoses
to the auxiliary hose carrier bulkhead fittings and
tighten until wrench-tight. Mark the hose fitting then
tighten each hose firmly 1 to 1 1/2 flats.
19. Start the engine and operate all boom functions
several times. Check for leaks, and check the
hydraulic fluid level in the reservoir; add fluid if
required.