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18 cylinder repair, 8 cylinder repair -9 – Snorkel LX41 Electric-sn4022+ User Manual

Page 29

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Section 1 - General Information

Cylinder Repair

Service Manual

Page 1-9

1-8 C

YLINDER

R

EPAIR

W A R N I N G

!

!

Cylinders may be very heavy. Support heavy cylinders before removing pins which secure the cylinder
to the machine.

R

E M O V A L

NOTE:

Refer to the

Service and Repair

section for the location of cylinders, and the

Parts Manual

for a list of parts

which secure the cylinders.

1. Mark and disconnect hoses and IMMEDIATELY cap the openings to prevent contamination.

2. Remove the cylinder from the machine as described in the

Service and Repair

section.

D

I S A S S E M B L Y

1. Remove the head from the cylinder body.

2. Carefully slide the rod assembly out of the cylinder.

3. Remove the seal kit components (wipers, rod seals, o-rings and backup rings) from the 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 fingernail are unacceptable; replace the cylinder. Polishing is a sign of uneven
loading. When this occurs, the surface should be checked for roundness. Cylinders not round within
0,18 mm (.007 in.) should be replaced.

A

S S E M B L Y

Refer to the

Service and Repair

section for seal-kit assembly drawings, and the

Parts Manual

for illustrated

parts breakdowns.

NOTE:

•To avoid cutting the seals, do not use sharp edged tools during seal replacement. After installing seals allow at
least one hour for the seals to elastically restore to their original shape before assembling the cylinder.
•Torque all hardware to torques according to Table 1-1, “Torque Specifications for Hydraulic Components,” on
Page 1-3
unless otherwise specified.

1. Lubricate all components with clean hydraulic fluid.

2. Install new seal kit components.

3. Lubricate the rod wiper and seal with hydraulic fluid and slide the head onto the rod.

4. Lubricate the seals on the piston and head.

5. Carefully slide the rod assembly into the cylinder.

6. Secure the head into the cylinder.

I

N S T A L L A T I O N

1. Installation is reverse of removal.

2. Carefully remove the elevating assembly support.

3. Slowly cycle the cylinder several times to remove air from the hydraulic system.

4. Check for proper cylinder operation. Check hydraulic connections for leaks.

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