Snorkel UL25, Parts & Service Manual

Page: 37 / 94

2-10
Maintenance
Section
UL-25/32/40 Portable Personnel Lifts
2.
6
2.5 Mast Assembly (Cont.)
Platform Support Assembly
1. Slide cage support weldment into the top of the
platform assembly weldment.
2. Install stop bracket and retaining screws / washers.
3. Feed chains over sheave.
4. Install cable sheaves with cables to the top of cage
support weldment.
5. Feed sequencing strap from inside mast #6 over
sheave and out through the slot in the top of the cage
support weldment.
6. Install cage support weldment to mast #6 using eight
screws, tighten.
7. Attach chains to #5 casting front using new cotter pins.
Sequencing Strap Installation
When installing straps, make sure they are not twisted.
1. Feed fish tape up throug the bottom slot in cage
support weldment and out through the top slot.
2. Attach strap to fish tape and pull out through bottom
slot.
3. Feed fish tape down through the opening in the front of
the platform support weldment and out through the
bottom of the platform support weldment.
4. Attach strap to fish tape and pull out through opening.
Attach strap to platform support weldment, pull tightly
and secure with strap clamp and screws using Loctite ®
242 or equivalent on the threads.
5. Fish #6 strap up through mast between fourth and fifth
stages with fish tape.
6. Fish #5 strap up through mast between third and fourth
stages with fish tape.
7. Fish #4 strap up through mast between third and
second stages with fish tape.
8. Fish #3 strap up through mast between first and
second stages with fish tape.
9. Install strap #6 to #4 top casting.
10. Install strap #5 to #3 top casting.
11. Install strap #4 to #2 top casting.
12. Install strap #3 to top of #1 mast weldment.
13. Install the strap clamps and retaining screws using
Loctite ®
242 or equivalent on the threads. Pull straps
tight while tightening retaining screws.
2.6 Cylinder Assembly
SEAL REPLACEMENT (Figure 2-8)
Note: The Lift Cylinder Seal can be accessed from the
bottom of the Lift without removing the Cylinder
Assembly.
Using a suitable lifting device, lower the work platform
into a horizontal position (Figure 2-5). If possible, place
the machine onto a sturdy work table using a forklift.
Never attempt to lower lift into a horizontal
position without the use of a suitable lifting
device; bodily injury or damage to the
machine may result.
1. Remove cylinder mounting plate fasteners and retain-
ing ring.
2. Remove tie rod nuts, count the number of turns
required to bring the nut flush with the tie rod end and
record for reference during installation. The tension
on the tie rods maintains the left / right positioning of
the cylinder within the mast assembly, reinstalling the
nuts with the proper tension will speed up adjustment
later.
3. Remove the cylinder mounting plate. Be careful not
to allow the tie rods to suck back inside of the mast
assembly, replace the nuts on the tie rod ends tempo-
rarily to prevent this.
4. Remove hydraulic line from the cylinder fitting and
cap the cylinder fitting to prevent contaminants from
entering the cylinder.
Marring the surface of the cylinder rod will
damage cylinder seals and cause leakage. Use
a strap wrench to prevent rod damage.
5. Extend cylinder rod at least twelve inches by hand.
Apply heat to rod near end cap to loosen Loc-tite®.
Wear safety glasses and heat resistant gloves
when operating torch. Do not touch hot
surfaces without proper protection.
6. Using a Strap Wrench, 062482-000, to secure the
cylinder rod, unscrew the cylinder rod end. If neces-
sary, thread a 9/16 x 18 bolt into end cap port to use as
a lever. Remove rod end cap and orifice / bleeder tube
assembly.