Gradall – Gradall 544D (9136-4003) Service Manual User Manual
Page 331
3
/
4
" Retract Chain Roller
Preparation
Extend the boom until an access hole is accessible.
Position the handler in a safe, level, open area well away from
personnel and equipment. Apply the park brake, shift the
forward/reverse lever to Neutral and turn the rear
wheels straight forward.
Remove the jam nut from the chain clevis at the back of
boom-section 4.
Back off the adjusting nut on the chain clevis fully
without removing it.
Carefully retract the boom part way.
Turn off the ignition, remove the keys and chock all wheels.
Removal
Unbolt the hydraulic sub-assembly bracket of the rear from boom-section 3.
Lift the hydraulic sub-assembly off the roller.
Remove one bolt from the keeper plate and swing it out of the way.
Remove the pin and roller.
Install a new pin and roller.
Reinstallation Hook-Up
Position the handler in a safe, level, open area well away from personnel and
equipment. Apply the park brake, shift the forward/reverse lever to Neutral and
turn the rear wheels straight forward.
Install the hydraulic sub-assembly.
Extend the boom until an access hole is accessible.
Tighten the adjusting nut on the chain clevis.
Install the jam nut on the chain clevis.
Readjust the chain per instructions in Section 4.
9.4
CAUTION
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Note!
You may hove to use threaded
rod (all thread) to reinstall the
Hydraulic Sub-Assembly bracket
removed at Removal, Step 1.
Refer to Section 7.
GRADALL
GRADALL
R
EAR,
B
OOM-
S
ECTION
4
F
RONT
B
OOM-
S
ECTION
2
B
OOM-
S
ECTION
4:
R
EAR
V
IEW
Stop before the top pads hit the bolts.
C
OMPLETE
B
OOM
A
SSEMBLY
R
EAR
V
IEW