64
REV. 09/2020
65
REV. 09/2020
HYDRAULIC SYSTEM
HYDRAULIC SYSTEM
7
7
Cylinder Cap
Cylinder Wrenches
Piston Rod
Cylinder Tube
*
*
See
for the removal and installation of lift
cylinder and side shift cylinder.
See
for the removal and instal-
lation of steering 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 identified if it is
for shaft or hole to avoid misplacement;
The removed O-rings and dust rings should
be replaced with new ones.
-
-
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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-
7.5.2 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 first with
hydraulic oil.
CAUTION
7.5.3 Removal and Installation
-
Fix the mast, block the truck wheels with
wooden wedge, press the emergency stop
switch and turn off the key switch;
-
Unscrew the two nuts (1) and remove the two
tubings (2) from the tilt cylinder (3);
-
Unscrew the anchor bolt (6) from the outer
mast with socket wrench and pull out the pin
shaft (7);
-
Unscrew the anchor bolt (4) from the chassis
with socket wrench and pull out the pin shaft
(5);
-
Remove the tilt cylinder (3);
-
Replace with new cylinder and install in rever-
se order;
-
Add hydraulic oil of the same specifications
Tilt cylinder is installed on the chassis and outer
mast.
Hydraulic oil may damage truck parts and con-
taminate the environment. When removing
joints or tubings, place a clean container under
it for discharge of hydraulic oil.
CAUTION
1
3
6
7
4
5
2
Fig3132-40007SM
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-
-
Pull out emergency switch and turn on the
key switch;
Repeat tilt cylinder to discharge the air within
the tubings and cylinder;
Check the hydraulic oil level and make sure
that the liquid is at standard level.
