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Section 5 – Procedures Boom
5.4-5 Boom Section Wear Pad
Replacement
If wear pads inside the boom sections are worn and
cannot be shimmed to meet the specification, they
must be replaced. Wear pads that are worn past the
specification can impair machine operation. For wear
pad limit specification, refer 5.4-1 Check Wear Pads.
WARNING
Use original or manufacturer-approved parts and
components for the aerial platform.
The boom sections must be disassembled to replace
the wear pads. Typically the bottom platform-end
and the top counterweight-end pads on each boom
section wear out first. Check which ones need to be
replaced before disassembly.
NOTE
To disassemble the boom sections, the extension
cylinder and cable assembly inside the boom
must be removed first. See 5.4-17 Extension
Cylinder and Cable Assembly Removal
To disassemble the boom sections, the fly boom and
mid boom must be slid fully out of the main boom.
Provide enough space at the platform end of the
machine at least the length of boom assembly.
Preparation:
â–ª
Remove the jib boom and the platform before
disassembly. Removing these components limits
twisting when lifting, and provides better control
when sliding the boom sections out. See 5.4-6
Platform and Jib Boom Removal. If the machine
does not have a jib boom, just the platform is
removed.
â–ª
Before beginning, place the machine in the
proper shut down position, parked on level
ground.
â–ª
Make sure the e-stops are pushed in and the key
is off.
â–ª
Turn the main power disconnect switch off. Lock
out the switch.
CAUTION
There is a risk of personal injury or equipment
damage if repositioning the boom with the platform
removed. Use the base controls with auxiliary
power (engine off) to reposition the boom safely.
IMPORTANT
If boom repositioning is necessary during this
procedure, select emergency power position from
start–function enable–emergency power switch,
then activate desired boom function.
When operating on auxiliary power, do not
operate more than one function at a time to avoid
overloading the 12-volt auxiliary pump motor.
CAUTION
Risk of personal injury or equipment damage.
Always use suitable lifting equipment and safe
rigging practices when performing the following
procedures.
NOTE
If boom repositioning is required with the platform
removed and control cables disconnected,
reconnect the two main (24 pin) control cables
and the jib and platform rotate harness (as
equipped) to the platform control box. See 5.4-20
Wire Rope Inspection.
The machine cannot operate with the two
platform control harnesses disconnected.
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