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REV B
Section 4 • Repair Procedures
June 2005
Part No. 52075
TMZ-34/19
4 - 19
How to Remove the Secondary
Boom Lift Cylinder
When removing a hose assembly
or fitting, the O-ring on the fitting
and/or hose end must be replaced
and then torqued to specification
during installation. Refer to
Section 2, Hydraulic Hose and
Fitting Torque Specifications.
Perform this procedure on a firm,
level surface.
1 Tag, disconnect and plug the hydraulic hoses
on the secondary boom lift cylinder. Cap the
fittings on the cylinder.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to squirt
or spray.
2 Tag and disconnect the wiring from the solenoid
valve on the cylinder.
3 Support the rod end of the cylinder with an
appropriate lifting device.
4 Remove the pin retaining fastener from the
secondary boom lift cylinder rod-end pivot pin.
5 Using a soft metal drift, remove the secondary
boom lift cylinder rod-end pivot pin.
Crushing hazard. The lift cylinder
will fall if not properly supported.
6 Lower the cylinder onto the secondary linkage.
7 Attach an overhead crane to the boom pivot.
8 Carefully raise the boom pivot with the
overhead crane until the secondary boom is in
a horizontal position.
BOOM COMPONENTS
a
boom pivot
b
secondary boom
c
secondary boom lift cylinder rod-end pivot pin
d
secondary boom lift cylinder
e
secondary boom lift cylinder barrel-end pivot pin
b
d
e
c
a
9 Support the secondary boom lift cylinder with an
appropriate lifting device.
10 Rotate the rod end lug of the secondary boom
lift cylinder until it can clear the secondary
linkage during removal.
11 Remove the pin retaining fastener from the
secondary boom lift cylinder barrel-end pivot
pin.
12 Using a soft metal drift, remove the secondary
boom lift cylinder barrel-end pivot pin.
Crushing hazard. The lift cylinder
will fall if not properly supported.
13 Carefully remove the cylinder from the machine.
Crushing hazard. The lift cylinder
could become unbalanced and fall
if not properly supported when
removed from the machine.
Component damage hazard. The
solenoid valve can be damaged.
Use caution when removing the
cylinder from the machine.
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