Chapter 4 Maintenance & Repair
31
Electric Crane Wear Pads
IMT crane booms extend and retract on synthetic wear pads. The pads drop in place at the top
or bottom of the inside of the booms, or snap in place into the sides of the booms. See figure for
wear pad locations. With crane use, wear pads wear and must be replaced. Replace wear pads
when any of the following conditions exist:
When pads wear such that boom sections rub on boom sections with the result of metal
scraping and the removal of paint on the boom sections.
With the boom sections extended in the horizontal position, there is noticeable droop. Any
visible droop in the boom sections indicates the need for wear pad replacement.
LOWER
BOOM
1ST
EXTENSION
BOOM
2ND
EXTENSION
BOOM
WEAR
PADS
WEAR
PAD
WEAR
PADS
WEAR
PAD
To remove boom wear pads:
1
Remove cable and limit switch on boom tip.
2
Raise the lower boom slightly to provide clearance for the extension cylinder base pin.
Remove pin. You will to remove all the wear pads at the end of the boom prior to removing
the cylinder, as it is trapped in place.
3
Lower the boom to drop back to the horizontal position.
4
Manually pull out the required extension boom section sufficiently to allow wear pad access.
Remove wear pads. Replace.
5
For manual extensions, you will need to remove the stop screws between the hydraulic and
manual extensions to remove the extension and replace any worn wear pads.
To reassemble crane:
1
Reverse steps to re-assemble with new wear pads. Torque according to torque charts in
general reference section.
Summary of Contents for 2003i
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