Upright ULII-25, Руководство по обслуживанию и запасным частям

Страница: 33 / 113

UL-25/32/40/48 Portable Personnel Lifts 4-11
Maintenance
Section
4.6
7. Remove the seal retainer, using the spanner wrench,
62521-010 (UL25,32,40,48).
8. Clean all sealing surfaces with solvent. Inspect
cylinder rod for excessive wear, replace if necessary.
9. Remove all seals from seal retainer, rod end cap and
discard.
Note: Apply clean hydraulic fluid to new cylinder
seal, threads and all sliding surfaces prior to assem-
bly. If necessary, soften new seals with warm water
(180°F [82°c]) to aid in installation.
10. Twist the pressure seal into a 'C' shape and snap into
seal groove in seal retainer, making sure the lip of
the seal is facing inward.
11. Using the same method, install the rod wiper into the
seal retainer outer groove, making sure that the blade
of the seal is facing outward from the seal retainer.
12. Replace static seals in rod end cap and seal retainer
by streatching them into place. Be carefull not to
cut the seal during installation.
13. Install the seal retainer onto rod using a sharp blow
from a hard rubber mallet to overcome seal
squeeze. Slide seal retainer into place and tighten
using the spanner wrench.
14. Rod and rod end threads must be absoloutly clean.
Spray threads with Loctite
®
primer #7471, allow to
dry for five minutes. Coat threads liberally with
Loctite
®
#242. Thread rod end cap onto rod,
tighten using strap wrench to hold rod.
15. Push rod back into cylinder for reassembly.
16. Reconnect hydraulic line.
17. Remove nuts from tie rod ends and set the cylinder
mounting plate into place. Secure mounting plate
with fasteners.
18. Install tie rod nuts flush with tie rod ends, torque each
nut the exact number of turns used to remove it.
19. Reinstall retaining ring.
20. Using a suitable lifting device, raise the lift to its
normal vertical position.
22. Bleed air from cylinder by cycling the mast to full
extension several times. The cylinder is self bleeding;
air will be forced out of the cylinder during the
lowering cycle.
23. If necessary, remove pinch shield and check align-
ment of cylinder within mast assembly by peering
down the mast with a flashlight. The cylinder may
be moved left or right by tightening one or the other
of the tie rod nuts.
If cylinder is not centered, mast may "hang"
when lowering.
Keep hands clear of the mast assembly
when the pinch shield is removed for
inspection purposes; pinching injury to
hands may result .
Never operate a machine with the pinch
shield removed, except for inspection.
Figure 4-8: lift Cylinder
Seal Profile
1. Static Seal #1
2. Rod Wiper
3. Pressure Seal
4. Static Seal #2
5. Stop Rings (non replaceable)
6. Rod End Cap
7. Orifice
8. Snap Ring
9. Seal Retainer
10.Bleeder Tube
11.Cylinder Rod
12.Cylinder Body