Snorkel UL25, Parts & Service Manual

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UL-25/32/40 Portable Personnel Lifts 2-13
Maintenance
Section
2.6
CYLINDER REMOVAL (Figure 2-9)
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.
5. Remove sequence strap retainers on the top of #3 and
#2 masts.
6. Remove front and rear mast access plates from the
bottom of the #1 mast.
7. Remove the screws and washers, attaching the #2 and
#3 bottom castings to the #2 and #3 mast assemblies.
8. While keeping tension on the tie rods, slide the
cylinder and #2 and #3 bottom castings out the bottom
of the UL Lift far enough to expose both castings.
9. Install cylinder Tensioner Brackets, 062739-000 on #2
and #3 bottom castings. Remove tie rod nuts and
install the Tie Rod Tensioners, 062738-000. Remove
all slack from the chains with the Tie Rod Tensioners.
10. Remove cylinder assembly from mast assembly.
INSTALLATION
NOTE: Cylinder assembly must have Tension Brack-
ets, Tensioner Spacer and Tie Rod Tensioners installed
to remove slack from chain.
1. Slide cylinder assembly into mast assembly until #3
bottom casting is at the bottom of the mast assembly.
2. Install the screws and washers attaching the #3 bottom
casting to the #3 mast assemby.
3. Remove cylinder Tensioner Brackets from #2 and #3
bottom castings and Tie Rod Tensioners from tie rods.
Install tie rod nuts finger tight.
4. While maintaining tension on the tie rods to keep slack
out of the chains, slide cylinder assembly completely
into the mast assembly.
5. Install the screws and washers attaching the #2 bottom
casting to the #2 mast assembly.
6. Install front and rear mast cover plates on the bottom
of #1 mast.
7. Fish #4 strap between #3 and #2 mast with fish tape.
8. Slide #4 strap through #2 casting.
9. Fish #3 strap between #2 and #1 mast with fish tape.
10. Install strap #4 to #2 top casting.
11. Install strap #3 to #1 top casting.
12. While maintaining tension on the sequencing straps,
install strap retainers using Loctite
®
242 or equivalent
on the threads of the retainer screws.
13. Reconnect hydraulic line.
14. Remove nuts from tie rod ends and set the cylinder
mounting plate into place. Secure mounting plate with
fasteners.
15. Install tie rod nuts flush with tie rod ends, torque each
nut the exact number of turns used to remove it.
16. Reinstall retaining ring.
Figure 2-9: Cylinder Assembly Installation
1
2
3
5
4
6
4.Bottom Casting, Mast #2
5.Bottom Casting, Mast #3
6.Cylinder
1.Tensioner Bracket (062739-000)
2.Tie Rod Tensioners (0 62738-000)
3.Tie Rods