3-22
LX31/41 Electric Work Platform
M
AINTENANCE
Section
3.17
3.17 C
YLINDER
R
EPAIR
Removal
1. Remove cylinder from machine.
NOTE: Refer to “Illustrated Parts Section” for
location of cylinder and list of parts which
secure cylinder.
NOTE: If necessary, refer to “3.6 Blocking Elevat-
ing Assembly” on page 3-6.
2. Mark and disconnect hoses and IMMEDIATELY
cap the openings to prevent contamination.
Cylinders may be very heavy. Support heavy
cylinders before removing pins which secure
cylinder to machine.
Disassembly
1. Remove head from cylinder body.
2. Carefully slide rod assembly out of cylinder.
3. remove seal kit components (wipers, rod seals,
o-rings and backup rings) from head and piston.
4. Inspect parts for scratches, pits or polishing.
Check seal grooves and sealing surfaces.
Scratches or pits deep enough to catch the finger-
nail are unacceptable; replace the cylinder. Pol-
ishing is a sign of uneven loading. when this
occurs, the surface should be checked for round-
ness. Cylinders not round within .007” (0,18 mm)
should be replaced.
Assembly
NOTE: Unless otherwise specified, torque all fit-
tings according to “Table 3-2:” on
page 3-26, and “Table 3-3:” on page 3-26.
1. Lubricate all components with clean hydraulic
fluid.
NOTE: To avoid cutting the seals, do not use
sharp edged tools during seal replace-
ment. After installing seals allow at least
one hour for the seals to elastically
restore to their original shape before
assembling cylinder.
2. Install new seal kit components.
3. Lubricate rod wiper and seal with hydraulic fluid
and slide head onto rod.
4. Lubricate seals on piston and head.
5. Carefully slide rod assembly into cylinder.
6. Secure head into cylinder.
Installation
1. Installation is reverse of removal.
2. Carefully remove elevating assembly support.
3. Slowly cycle cylinder several times to remove air
from the hydraulic system.
Check for proper cylinder operation. Check hydraulic
connections for leaks.
W A R N I N G
!
!
Содержание LX31
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