JLG 534D-10 - Manual (Page 59)

3.31 534D-9, 534D-10 & 544D
Boom
4. Loosen and remove the tilt/aux hose take-up bracket
(5) from the bottom of the first boom section.Pull the
tilt/aux hoses out from the rear of the boom.
5. Remove the bolts holding the chain adjustment block
(6) to the first boom section.
6. Slowly pull the second boom section out of the first
boom section. The third section retract chain will
stay with the first boom section.
7. Lift the second boom section free of the machine
and place on the ground or suitable supports.
3.11.4 Second, Third and Fourth 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 fourth, third and
second sections can be removed as a package.
1. Loosen and remove the wear pads from the top rear
and one side of the second boom section. Leave all
the bottom wear pads in place to aid sliding during
the section removal. Note the location of the wear
pads, mounting bolts and number of shims from
each location.
2. Release tension from the hoses on the hose take-up
bracket (5).
3. Loosen the tilt circuit hoses, auxiliary circuit hoses
and any electrical hoses if equipped on the hose
take-up bracket. Plug the hose ends and tube ends
to prevent dirt and debris from entering the hydraulic
system.
4. Disconnect the top front extend chains from the
chain clevises on the first boom section.
5. Disconnect the bottom rear retract chain from the
chain clevis on the third boom section.
6. Remove the chain adjustment block (6) from the first
boom section.
7. Remove all 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.
8. Carefully pull the second, third and fourth boom
sections together from the first boom section and
place on suitable supports for further separation.
3.11.5 Second Boom Section Installation
1. Grease the inside wear pad paths of the first boom
section and the outside wear paths of the second
boom section.
2. Position the second boom section into the front of
the first boom section. Leave room at the bottom
front to install the retract chain adjustment block and
wear pads.
3. Install the retract chain adjustment block and bolt
into place.
4. Install the wear pads and shims at the front of the
first boom section.
5. Install the wear pads and shims at the rear of the
second boom section.
6. From the rear of the boom, push the third boom
section retract chain in place between the first and
second boom sections. Place the chain clevis
through the adjustment block and install the jam
nuts. Do not tighten the jam nuts at this time.
7. From the rear of the boom, feed the tilt/aux hoses
between the first and second boom sections.
8. Install the hose take-up brackets and connect the tilt/
aux hoses to the proper fittings.
Note: Do Not install the rod end of the extend/retract
cylinder to the second boom section at this time as it
may be necessary to move the boom sections to access
hoses, wear pads or chains.
3.11.6 Third Boom Section Installation
1. Grease the inside wear pad paths of the second
boom section and the outside wear paths of the third
boom section.
2. Position the third boom section with the extend
chains connected at the rear and laying on the third
boom section into the front of the second boom
section. Leave room between the sections to install
the wear pads.
3. Install the wear pads and shims at the front of the
second boom section.
4. Install the wear pads and shims at the rear of the
third boom section.
MX1440
4 5
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