99903514:TELESCOPIC CRANE: 3A-5
SECTION 3A: CYLINDER REPAIR
20030315
SEAL INSTALLATION GUIDELINES
CAUTION
REPLACE ALL SEALS IN THE SEAL KIT. DOING
SO WILL REDUCE EXPENSIVE DOWNTIME IN THE
NEAR FUTURE.
To provide maximum sealing capabilities of cylinder
seals, proper installation is required. Improper or
careless installation accounts for the failure of seals
as much as does wear. The education and training
of repair personnel should be a part of any
maintenance program.
The installation of seals will vary depending on
variations in seal design and whether it slips into an
end groove or must snap into a recessed cavity.
Whichever variety is to be installed, the following
installation guidelines apply:
1. Clean the entire sealing device and all surfaces it
traverses to its groove of all foreign material. The
cleaning method should include a solvent degreasing
of the seal, cylinder component and any tools used
for installation. After degreasing, all components are
to be wiped thoroughly with a clean, lint-free cloth.
2. Lubricate both the seal and its installation path
prior to assembly. The lubricant must be selected for
compatibility with the seal material and system
working fluid. Do not use old or dirty oil which will
contain metal particles and other foreign matter.
Preferably, use a non-fibrous grease such as
Lubriplate.
3. Any nicks or cuts at the seal lip interface or on
the groove diameter are potential leak paths when
the system is fully pressurized. It is extremely
important that all sharp corners which the seal might
encounter during installation be dressed. Deburr and
polish any area or edge deemed the slightest bit
rough or sharp.
4. Make certain all seals and components are
replaced. All required seals should be checked-off
as installed. The omission of one seal can render the
cylinder ineffective.
5. The use of common sense, cleanliness and
careful installation is extremely important and can
make the difference between a properly working
cylinder and one which will require additional
maintenance.
FIGURE C1-2. SEAL INSTALLATION GUIDELINES
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