EP Equipment CQD16, Service Manual

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87
REV. 07/2016
HYDRAULIC SYSTEM
7
Cylinder Cap
Cylinder Wrenches
Piston Rod
Cylinder Tube
* See Appendix A - Service Manual - Mast for
the removal of lift cylinder, tilt cylinder and
side shift cylinder.
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O-ring is quite flexible and easy to install,
but it must not be pulled up to the extent of
permanent deformation, nor scroll it while
installing;
Y-ring or X-ring needs to be identifi ed if it is
for shaft or hole to avoid misplacement;
The removed O-rings and dust rings should
be replaced with new ones.
CAUTION
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Cylinder parts must not be arbitrarily repla-
ced, the original products provided by the
manufacturer should be used;
After maintenance and assembly of the cylin-
der is completed, pressure leak testing must
be carried out before it can be put operation
once again.
Before the testing, discharge the air within
the cylinder, run the cylinder in a small range
of movement for several times, and pay
attention if it is moving without blocking and if
there is uneven resistance during the moving.
Upon the pressure testing, raise the pressure
slowly and observe carefully for leaks.
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7.8.2 Cylinder Installation Precautions
All parts should be cleaned up before asse-
mbly, then to be assembled after being
dried;(during assembly, apply appropriate
amount of hydraulic oil for lubrication)
The tools used to install the seals must
be made of soft metal or suitable plastic,
without burrs and sharp edges on surfaces.
It is prohibited to use the tools that can
easily damage the surface of seals, such as,
screwdriver or other similar tools with hard
front edges.
Where the hydraulic seals to be installed
should be free of burrs, sharp edges and
cracks. If the installation of seals needs to
cross sharp edges, grooves or cuts, protective
devices must be used for protection. Before
installing, lubrication should be performed to
the seals and the mounting positions
fi rst with
hydraulic oil.
* See Appendix A - Service Manual - Mast for
the installation of lift cylinder, tilt cylinder and
side shift cylinder.