2.DISASSEMBLY
1) Remove the cylinder case assembly,referring
to relevant paragraph in Chapter 2.
Note:
Put the cylinder case on a wooden plank to
prevent the surface from damage.
2) Remove the cylinder head and extract the
cylinder.Then remove the piston from the
cylinder.
3) Applying aligning marks on the lift shaft(18)
and right hand lift arm(10).Then remove the lift
arm.
4) Remove the set bolt for the lift crank(13) and
remove the assembly of the lift shaft and lift
arm(20).
5) Remove the assembly of the lift crank(13) and
piston rod(17)
6) Unhook the spool-return spring and remove the
main control valve.
7) Remove the following linkage:
a.Pilot spool control linkage
b.Position control linkage
c.Draft control linkage.
Fig.9-4
9-5
2.REASSEMBLY
Reassemble in reverse order of disassembly.
3.1 GENERAL PRECAUTIONS
1) Hydraulic system parts should be completely
be free from dust before reassembly.
2) All removed O-rings should be replaced with
new ones.which should be lubricated with
grease before installation.
3) When the lift shaft is removed,the oil seal
should also be replaced with a new one.
4) Install the piston from the cylinder head side.
The O-ring and back up ring should be coated
with grease ahead of time.Install with care so as
not to damage them.
5) When assembling the lift crank on the lift shaft,
mesh their splines using the alignment marks
which were put there before disassembly.
6) Wrap the threads of the safety valve with
sealing tape and then tighten the valve securely
to the specified torque.
5.0-6.0 Kgf.m
(36.2-43.4 ft.lbs)
Tightening torque
7) When installing the control valve,apply grease to
the O-rings and avoid their dislocation or binding
during tightening the valve to the specified torque.
1.3-1.8 Kgf.m
(9.4-13.0 ft.lbs)
Tightening torque
8) Tighten the slow return check valve to the
specified torque.
10-12 Kgf.m
(72-87 ft.lbs)
Tightening torque
9) Apply rod length L as specified(Fig.9-5)
114 mm(4.49 in)Length L
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