Upright ULII-25, Service & Parts Manual

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4-6
Maintenance
Section
UL-25/32/40/48 Portable Personnel Lifts
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.
3. Remove cotter pins, and drive out chain retaining
pins from the top front of stage 5.
4. Loosen screws from strap retainer on stage 5 top
casting. Pull strap free of retainer.
5. Remove cage support screws, slide the cage support
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.
Note: to remove the platform assembly from the
cage support assembly, follow steps 6-10 below.
6. Remove cable sheaves from cage support weldment,
and strain reliefs from stage 5 top casting.
7. Loosen screws from strap retainer on platform
assembly weldment and free strap from retainer.
8. Remove two screws and washers holding stop
bracket located at top of platform assembly weld-
ment. Remove the stop bracket.
9. Slide the cage support weldment out of the top of
the platform assembly weldment.
10. Slide bearings in platform assembly may now be
inspected / replaced if necessary.
#6 Mast
1. Remove sequence strap retainer on the top of #4 mast.
2. Remove the Allen head screws holding the top mast
bearings between the #5 and #6 mast. Remove the
top mast bearings.
3. Slide #6 mast out of #5 mast. As mast is removed,
the bottom four mast bearings will fall out; note
their orientation for re-assembly.
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
bearings between the #4 and #5 mast. Remove the
top mast bearings.
3. Slide #5 mast out of #4 mast. As mast is removed,
the bottom four mast bearings will fall out; note
their orientation for re-assembly.
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
bearings between the #3 and #4 mast. Remove the
top mast bearings.
3. Slide #4 mast out of #3 mast. As mast is removed,
the bottom four mast bearings will fall out; note
their orientation for re-assembly.
Figure 4-5: Lifting/Lowering UL Lift
4.5
Forklift