Check The Primary Boom Wear Pads; Check The Turntable Rotation Bearing Bolts - Genie Z-45/22 Service Manual

Section 4 - Scheduled Maintenance Procedures
Table C Procedures
C-1
Check the Primary Boom
Wear Pads
Maintaining the primary boom wear pads in good
condition is essential to safe machine operation.
Wear pads are placed on boom surfaces to
provide a low friction, replaceable wear pad
between moving parts. Improperly shimmed wear
pads or continued use of worn out wear pads may
result in component damage and unsafe operating
conditions.
1 Start the engine from the ground controls, then
raise the end of the primary boom to a
comfortable working height (chest high).
2 Extend the extension boom 10 inches (25cm).
3 Measure each wear pad. Replace the pad if it is
less than 0.41 inches (1cm) thick. If the pad is
more than 0.41 inches (1cm) thick, shim as
necessary to obtain zero clearance and zero
drag.
4 Extend and retract through the entire range of
motion to check for tight spots that could cause
binding.
Always maintain squareness
between the primary boom outer
and inner tubes.
C-2
Check the Turntable Rotation
Bearing Bolts
Maintaining proper torque on the turntable bearing
bolts is essential to safe machine operation.
Improper bolt torque could result in an unsafe
operating condition and component damage.
1 Raise the secondary boom and place a 4x4x31
inch (78cm) block between the chassis
counterweight and the upper mid-pivot.
Carefully lower the secondary boom onto the
block.
4 - 24
a
b
c
2 Raise the primary boom until the end of the
boom is approximately 7 feet (2m) off the
ground.
3 Be sure that each turntable bolt is torqued to
190 foot-pounds (258 Newton meters).
16
24
3
11
17
4 Remove the support block and then lower the
primary and secondary booms to the fully
stowed position.
5 Use a forklift to support the chassis
counterweight, directly below the turntable
bearing.
6 Loosen the counterwight positioning bolt, then
remove the 2 mounting bolts.
Genie Z-45/22
Service Manual - First Edition
a upper mid-pivot
b 4x4x31 inch block
c counterweight
Crushing hazard. Keep hands
away from the block and all
moving parts when lowering the
secondary boom.
1
9
22
20
13
6
7
8
5
14
19
21
10
2
Bolt torque sequence
Part No. 29487
18
12
4
23
15