JLG 4017PS Service Manual - Manual (Page 55)

3-17 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
Boom
3.6.6 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 control lever 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.
3. Open the engine cover. Allow the system fluids to
cool.
Note: Grease the boom pivot bore, compensating
cylinder rod ends, lift/lower cylinder rod end and pins
before installing.
4. Using suitable slings, balance the boom assembly,
lift and carefully guide the boom into place. Align the
frame pivot bore with the boom assembly pivot bore.
Install boom pivot pin and lock bolt (4). Apply
Loctite
® 242 TM and torque to 90 Nm (66 lb-ft).
5. With the sling still in place, install the compensating
cylinders, pins and lock bolts. Apply Loctite ® 242 TM
and torque to 90 Nm (66 lb-ft).
6. With the sling still in place, install the rod end of the
lift/lower cylinder, pin and lock bolt. Apply Loctite ®
242 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.
7. Uncap and connect the previously labeled extend/
retract cylinder hoses to the extend/retract cylinder.
8. Uncap and connect the previously labeled tilt hoses
and (if equipped) auxiliary hoses to the appropriate
cylinder.
9. Install the boom angle sensor arm. Refer to Section
9.12.7, “Boom Angle Sensor.”
10. 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.
11. Clean up all debris, hydraulic fluid, etc., in, on, near
and around the machine.
12. Close and secure the engine cover.
3.7 BOOM CHAIN REMOVAL/
INSTALLATION
3.7.1 Retract Chain Removal
The removal of the retract chain can be accomplished
with out the complete tear down of the boom sections.
1. Remove any attachment from the quick coupler
assembly. Refer to Operation & Safety Manual.
2. Park the machine on a hard, level surface, fully
retract the boom, level the boom assembly, place the
transmission control lever in (N) NEUTRAL, engage
the park brake and shut the engine OFF.
3. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel.
4. Open the engine cover. Allow the system fluids to
cool.
5. Properly disconnect the battery.
6. Remove the retract chain lock nut and adjusting nut
(1). Fasten a rope/wire to the threaded end of the
shackle end to aid in reinstallation.
MAM0670
4
MAM1370
1