Checklist D Procedures; Check The Boom Wear Pads - Genie Z80/60 Service Manual

June 2012 June 2011
REV E REV D
D-1

Check the Boom Wear Pads

Maintaining the boom wear pads in good condition
is essential to safe machine operation. Wear pads
are placed on boom tube surfaces to provide a low
friction, replaceable wear pad between moving
parts. Improperly shimmed wear pads or continued
use of extremely worn wear pads may result in
component damage and unsafe operating
conditions.
Boom wear pad specifications
Primary Boom
Top, bottom and side wear pads
Primary Extension Boom
Top wear pads
Side wear pads
Secondary Boom
Top wear pads
Side and bottom wear pads
Secondary Extension Boom
Top wear pads
Side wear pads
Part No. 88619
Section 3 • Scheduled Maintenance Procedures

Checklist D Procedures

1 Start the engine from the ground controls.
2 Raise the end of the boom to a comfortable
working height (chest high), then extend the
boom 1 foot / 30 cm.
3 Measure each wear pad.
Result: Replace the wear pad if it is less than
specification. If the wear pad is not less than
specification, shim as necessary to obtain
minimum clearance with no binding.
Note: The minimum shim clearance for the primary
boom wear pads is .030 inch / .76 mm and the
maximum allowable shim clearance is .090 inch /
2.29 mm. The minimum shim clearance for the
secondary boom wear pads is .030 inch / .76 mm
Minimum
and the maximum allowable shim clearance is .125
inch / 3.2 mm.
Note: If the wear pads are still within specification,
5
/ inch
8
refer to refer to Repair Procedure 4-2, How to Shim
15.9 mm
the Boom.
4 Extend and retract the boom through the entire
range of motion to check for tight spots that
5
/ inch
8
may cause binding or scraping of the boom.
15.9 mm
Note: Always maintain squareness between the
1
/ inch
2
outer and inner boom tubes.
12.7 mm
1
/ inch
2
12.7 mm
7
/ inch
8
22.2 mm
5
/ inch
8
15.9 mm
1
/ inch
2
12.7 mm
Z-80/60 3 - 51