JLG 534D-10 - Manual (Page 56)

Boom
3.28 534D-9, 534D-10 & 544D
12. Install the top front chain roller (14) to the second
and third boom sections.
13. Install the hoses (15) to the bulkhead fittings on the
hose take-up weldment.
14. Install the cushion clamps around the hoses on the
first boom section.
15. Install the extend/retract cylinder and support to the
first and second boom sections.
16. Attach the extend/retract cylinder hose assembly.
17. Connect the top front chain clevises to the chains,
then connect the chains to the first and second
boom sections.
18. Adjust the 1 in (25 mm) retract chain at the bottom
front of the first boom section (16) to 2 7/8 in
(73 mm) for the initial set-up.
19. Install the tilt cylinder and connect the hose
assemblies to the hose carrier assembly and to the
tilt cylinder.
20. If the machine is equipped with auxiliary hydraulics,
install the auxiliary hoses and electrical cable to the
boomhead of the fourth boom section.
21. The boom is now complete and ready to be turned
over and installed on the machine.
3.10.12 Boom Assembly Installation
1. Re-check that the machine is safely secured.
2. Connect the lifting tackle, crane and re-lash the
boom assembly at the balance point.
3. Install the tackle between the extend/retract cylinder
and the boom.
Note: Make sure a tag line is installed.
4. Make a test lift to ensure that the rigging is hooked
up correctly to lift the boom assembly in a balanced
mode.
5. Lubricate all pins and bushings.
6. Lift the boom assembly into position on the machine.
7. Line up the base pin holes, insert pins and lock into
place.
8. Install the lift cylinder onto the boom, insert the pins
and lock into place.
9. Install the compensation cylinder onto the boom,
insert the pins and lock into place.
10. Uncap and reconnect the hydraulic hoses and
electrical cable. Torque the hose fittings per Section
2.2, “Torque Charts.”
11. Start the machine and slowly operate the boom
assembly full cycle at least 10 times.
12. Check for any hydraulic leaks and repair if
necessary.
13. Cycle the boom assembly 10 more times to be
certain that all air has been purged from the system.
14. Final adjust the boom wear pads, extend and retract
chains, hose take-up assembly and any other area
that needs to be serviced.
3.11 BOOM MAINTENANCE - FOUR
SECTION
(INDIVIDUAL SECTION REMOVAL)
These instructions help with the removal of individual
boom sections with the complete boom still mounted on
the machine. Safe practices and common sense must be
followed when removing boom sections.
Before beginning, conduct a visual inspection of the
machine and work area, and review the task about to be
undertaken. Read, understand and follow these
instructions taking into consideration your particular
situation.
For more detailed instructions, see Section 3.10, “Boom
Maintenance - Four Section (Complete Removal).”
MX0480
14
MX0490 16
15