JLG 534D-10 - Manual (Page 38)

Boom
3.10 534D-9, 534D-10 & 544D
23. Slowly pull the push beam out of the front of the third
boom section. The extend cables will come out along
with the push beam.
24. When the head of the push beam is out of the third
boom section, stop and pull the extend cables the
remaining of the way out over the cable sheaves of
the push beam.
25. Slowly pull the push beam free of the machine and
place on the ground or suitable support.
Note: The extend/retract hydraulic cylinder can be
removed from the push beam if necessary.
26. Pull the retract cable from between the second and
first boom section at the rear of the boom.
27. Slowly pull the third boom section free of the
machine and place on the ground or suitable
support.
3.4.2 Second Boom Section Removal
1. Pull the tilt hoses, and if equipped, the auxiliary
hoses, from the bottom rear of the boom sheaves.
2. Remove the wear pads from the front of the first
boom section. Note the location of the wear pads,
mounting bolts and number of shims from each
location.
3. Remove the wear pads from the top rear and one
side of the second boom section. Note the location
of the wear pads, mounting bolts and number of
shims from each location.
4. Loosen and remove the retract cable adjustment
block (12) from the bottom front of the first boom
section.
Note: It may be necessary to pull the boom section(s)
out far enough to access the wear pads.
5. Slowly pull the second boom section out of the first
boom section.
6. Lift the second boom section free of the machine
and place on the ground or suitable supports.
3.4.3 Second and Third Boom Section
Removal
It is best to remove the boom sections in the order in
which they were assembled. If a section needs to be
separated, this presents an excellent opportunity to
check all sections for serviceability. The third and second
sections can be removed as a assembly. The push beam/
extend-retract cylinder can be either removed or left in
place during the third and second boom section removal.
1. Release tension from the hoses on the hose take-up
bracket (3).
2. Label, disconnect and cap all hydraulic hoses
attached at the take-up bracket (4). Cap all fittings
and openings to keep dirt and debris from entering
the hydraulic system.
3. If equipped, label, loosen and separate all electrical
cables at the take-up bracket.
4. Remove the take-up brackets (5).
5. Loosen and remove the jam nuts on the retract cable
(6) at the bottom of the first boom section.
6. Loosen and remove the retract cable adjustment
block (12) from the bottom front of the first boom
section.
7. Label, disconnect and cap both hydraulic hoses (7)
attached to the extend/retract cylinder. Cap all
fittings and openings to keep dirt and debris from
entering the hydraulic system.
8. Loosen and remove the jam nuts on the two extend
cables (8) at the strong back.
9. Remove the pin (9) holding the extend/retract
cylinder at the strong back.
MX1380
7
9
8
11
10
MX1390
12