JLG 534D-10 - Manual (Page 34)

Boom
3.6 534D-9, 534D-10 & 544D
3. Loosen and remove all extend cable sheave
components from the front of the pivot beam.
4. Pull the extend cables free of the sheave brackets
and lay them on the boom.
5. At the rear of the boom, loosen and remove all
retract cable sheave components and the hydraulic
hose rollers and components (7).
6. Loosen and remove all push beam pins (8).
7. Pull the push beam free from the front of the third
boom section.
8. Place the hydraulic hoses inside the third boom
section.
9. Place a sling around the third boom section, lift and
slowly pull the third boom section approximately half
way out of the second boom section. Lower the third
boom section onto a suitable support.
10. Relocate the sling or using two slings for better
stability, balance the third boom section and slowly
pull the third boom section out of the second boom
section. Lower the third boom section onto suitable
supports.
Note: Before reassembly of the boom, check the bores,
pins and bushings for damage. Repair as needed. Also
check the diameters of the pins and bushings.
3.3.4 Third Boom Section Installation
Note: During reassembly use Loctite 242 ® on all bolt
threads and use Loctite 545 ® on all hydraulic fittings
Note: Shim all wear pads to 1/16” of a tight fit. You may
have to final adjust the wear pads after the boom
assembly is installed on the machine and hydraulic
power is available.
Note: Coat the interior of all bushings and sheaves with
Mystik Tetrimoly Grease prior to the installation of pins
and bushings. Wear pads and slide areas must be
lubricated with Mystik Tetrimoly Grease or an equivalent.
1. Place the third boom section upside down on
suitable supports.
2. Install the wear pads and spacers on the bottom and
both sides at the rear of the third boom section. For
ease of installation DO NOT install the top wear
pads at this time.
3. Install the single retract cable and the double extend
cables to the bracket (9) at the rear of the third boom
section.
4. Install the tilt circuit hoses, auxiliary circuit hoses
and if equipped, the electrical cables and brackets
inside protected areas.
5. Install the hose brackets (10) in place at the front of
the third boom section.
6. Lubricate wear pad paths and lay the tilt hoses,
auxiliary hoses, cables and if equipped, electrical
cable inside the third boom section to protect against
being damaged when installing the third boom
section into the second boom section.
MX0140
6
7
8
MX0150
9
10