with hex groove.(Tightening torque:9 to 11 N.m)
with hex groove.(Tightening torque:9 to 11 N.m)
(4)
(4)
Fasten the O-ring and wip
Fasten the O-ring and wip
er to the plunger head side and
er to the plunger head side and
tighten the seal plate
tighten the seal plate
with screw to the torque of 4.6 to 5.8 N.m.
with screw to the torque of 4.6 to 5.8 N.m.
(5)
(5)
After assembling,install th
After assembling,install th
e check valve,spring and O-rin
e check valve,spring and O-rin
g in each section and
g in each section and
tighten them to the specified torques with three bolts.(one bolt:103N.m;the others:66N.m)
tighten them to the specified torques with three bolts.(one bolt:103N.m;the others:66N.m)
The main specification see Table 8-1.
The main specification see Table 8-1.
Table 8-1
Table 8-1
8.1 Lift Cylinder
8.1 Lift Cylinder
The two lift cylinders of single acting type are used and located behind each outer
The two lift cylinders of single acting type are used and located behind each outer
mast frame.The bottoms of the cylinders are sustained by the mast support of the outer
mast frame.The bottoms of the cylinders are sustained by the mast support of the outer
mast frame.The bottoms of the cylinders are sustained by the mast support of the outer
mast frame.The bottoms of the cylinders are sustained by the mast support of the outer
mast while the tops of them,or the piston rod ends are inserted into the one body
mast while the tops of them,or the piston rod ends are inserted into the one body
construction piston head.
construction piston head.
The lift cylinder assembly consists primarily of a cylinder
The lift cylinder assembly consists primarily of a cylinder
body,piston,pis
body,piston,pis
ton rod and
ton rod and
cylinder cap.At the lower part of the cylinder body is arranged an inlet for high—pressure
cylinder cap.At the lower part of the cylinder body is arranged an inlet for high—pressure
oil,and at the upper part there is an outlet for low—pressure oil above the piston
oil,and at the upper part there is an outlet for low—pressure oil above the piston
packing,to which a return pipe is connected.The piston is fastened to the piston rod
packing,to which a return pipe is connected.The piston is fastened to the piston rod
with
with
castle nut and cotter pin
castle nut and cotter pin
together with an O-ring.A wear
together with an O-ring.A wear
ring,packing and back—up ring
ring,packing and back—up ring
are attached to the outside periphery of
are attached to the outside periphery of
the piston which is moved along the
the piston which is moved along the
inner surface
inner surface
of the cylinder by high—pressure oil.An oil seal and bushing are installed on the cylinder
of the cylinder by high—pressure oil.An oil seal and bushing are installed on the cylinder
cap which is screwed into the cylinder body.The bushing supports the piston rod,and oil
cap which is screwed into the cylinder body.The bushing supports the piston rod,and oil
8. Lift Cylinder & Tilt Cylinder
8. Lift Cylinder & Tilt Cylinder
Type
Type
Cylinder bore
Cylinder bore
O.D. of piston rod
O.D. of piston rod
Stroke
Stroke
Type
Type
Cylinder bore
Cylinder bore
O.D. of piston rod
O.D. of piston rod
Stroke
Stroke
L
L
i
i
f
f
t
t
c
c
y
y
l
l
i
i
n
n
d
d
e
e
r
r
T
T
i
i
l
l
t
t
c
c
y
y
l
l
i
i
n
n
d
d
e
e
r
r
mm
mm
mm
mm
5-7t
5-7t
8
8
t
t
1
1
0
0
t
t
Single-acting piston type
Single-acting piston type
Φ80
Φ80
Φ90
Φ90
Φ100
Φ100
Φ
Φ
6
6
0
0
Φ
Φ
7
7
0
0
1495
1495
Double-acting piston type
Double-acting piston type
Φ115
Φ115
Φ50
Φ50
2
2
2
2
7
7
2
2
4
4
2
2
-96-
-96-
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