Mast Assembly; Disassembly; Platform Assembly Removal; Mast - Upright ULII-25 Service & Parts Manual

Section
4.5
4.5 Mast Assembly (Figure 4-6,4-7)

Disassembly

Using a suitable lifting device, lower the work platform
into a horizontal position (Figure 4-5). If possible, place
the machine onto a sturdy work table using a forklift.
Never attempt to lower lift into a horizon-
tal position without the use of a suitable
lifting device; bodily injury or damage to
the machine may result.
NOTE: Mark all components as they are removed so
they can be reinstalled in the correct sequence and
location.

Platform Assembly Removal

(Figure 4-6)
1. Extend elevating assembly far enough to expose the
eight screws attaching the cage support assembly to
stage 6 by opening the emergency lowering valve
and pulling on the cage guardrail.
2. Remove cover from front of platform assembly.
Figure 4-5: Lifting/Lowering UL Lift
4-6
Maintenance
3. Remove cotter pins, and drive out chain retaining
4. Loosen screws from strap retainer on stage 5 top
5. Remove cage support screws, slide the cage support
Note: to remove the platform assembly from the
cage support assembly, follow steps 6-10 below.
6. Remove cable sheaves from cage support weldment,
7. Loosen screws from strap retainer on platform
8. Remove two screws and washers holding stop
9. Slide the cage support weldment out of the top of
10. Slide bearings in platform assembly may now be

#6 Mast

1. Remove sequence strap retainer on the top of #4 mast.
2. Remove the Allen head screws holding the top mast
3. Slide #6 mast out of #5 mast. As mast is removed,
4. Disconnect chain from top of #4 mast.
#5 Mast
1. Remove sequence strap retainer on the top of #3 mast.
2. Remove the Allen head screws holding the top mast
3. Slide #5 mast out of #4 mast. As mast is removed,
4. Disconnect chain from top of #3 mast.
#4 Mast
1. Remove sequence strap retainer on the top of #2 mast.
2. Remove the Allen head screws holding the top mast
Forklift
3. Slide #4 mast out of #3 mast. As mast is removed,
pins from the top front of stage 5.
casting. Pull strap free of retainer.
out of the sixth stage mast and set aside. It should
not be necessary to remove the pinch sheild. Be
careful not to damage the control cable.
and strain reliefs from stage 5 top casting.
assembly weldment and free strap from retainer.
bracket located at top of platform assembly weld-
ment. Remove the stop bracket.
the platform assembly weldment.
inspected / replaced if necessary.
bearings between the #5 and #6 mast. Remove the
top mast bearings.
the bottom four mast bearings will fall out; note
their orientation for re-assembly.
bearings between the #4 and #5 mast. Remove the
top mast bearings.
the bottom four mast bearings will fall out; note
their orientation for re-assembly.
bearings between the #3 and #4 mast. Remove the
top mast bearings.
the bottom four mast bearings will fall out; note
their orientation for re-assembly.
UL-25/32/40/48 Portable Personnel Lifts
4.5