JLG 4017RS Service Manual - Manual (Page 51)

3-11 3614RS, 4017RS
Boom
18. Properly support the extend/retract cylinder (17) using
a hoist or crane and lower into place.
19. Install each mounting pin (18) in the extend/retract
cylinder.
20. Install one retaining ring to the mounting pin (18) at
each end of the extend/retract cylinder.
21. Remove caps and/or plugs from all fittings and
openings. Connect the extend/retract cylinder hoses
(19) to the extend/retract cylinder.
22. Install the extend/retract cylinder bracket (20).
3.3.6 Complete Boom Installation
Note: Lubrication of the boom wear surfaces with
Multipurpose Grease is recommended to keep the boom wear
surfaces lubricated properly. Lubrication of the boom wear
surfaces is also recommended when the machine is stored, to
help prevent rusting.
1. Park the machine on a hard, level surface, place the
transmission in (N) NEUTRAL, engage the park brake
and shut the engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel.
Note: Grease the boom pivot bores, compensating cylinder rod
end, lift/lower cylinder rod end and pins before installing.
3. Using suitable slings, balance the boom assembly, lift
and carefully guide the boom into place. Align the
frame pivot bores with the boom assembly pivot bores.
Install shims, boom pivot pins and lock bolt (21).
4. With the sling still in place, install the compensating
cylinder, pin and lock bolts.
5. With the sling still in place, install the rod end of the lift/
lower cylinder, pin and lock bolt. Apply
Loctite
® 243 TM and torque to 90 Nm (66 lb-ft).
Note: Raising the boom up or down with the sling may be
necessary so the boom, compensating and lift/lower cylinder
bores can be aligned for easier pin installation.
6. Uncap and connect the previously labeled extend/
retract cylinder hoses to the extend/retract cylinder.
7. Uncap and connect the previously labeled tilt hoses and
(if equipped) auxiliary hoses to the appropriate cylinder.
8. Install the boom angle sensor arm. Refer to Section
9.8.7, “Boom Angle Sensor.”
9. Remove slings and/or supports from the boom
assembly.
10. Properly connect the battery.
11. Start the engine and operate all boom functions several
times to bleed any air out of the hydraulic system. Check
for fluid leaks. Check the hydraulic fluid level in the tank
and add fluid as required.
12. Lower the boom assembly and shut engine OFF.
13. Clean up all debris, hydraulic fluid, etc., in, on, near and
around the machine.
14. Remove the Do Not Operate Tag from both the ignition
key switch and the steering wheel.
MZ7090
17
18
19
18
20
M 7240 Z
21
21
21
21