Service and Repair Manual
April 2017
Boom Components
26
GTH-844
Part No. 1272854
How t o Dis ass embl e the Boom
How to Disassemble the Boom
Bodily injury hazard. This
procedure requires specific repair
skills, lifting equipment and a
suitable workshop. Attempting
this procedure without these skills
and tools could result in death or
serious injury and significant
component damage. Dealer
service is strongly recommended.
Note: When removing a hose assembly or fitting,
the O-ring (if equipped) on the fitting and/or hose
end must be replaced. All connections must be
torqued to specification during installation. Refer to
Specifications,
Hydraulic Hose and Fitting Torque
Specifications.
1
Remove the extension cylinder.Refer to Repair
Procedure,
How to Remove the Extension
Cylinder.
2
Remove the boom.Refer to Repair Procedure,
How to Remove the Boom
.
3
Select a lift cylinder. Remove the fasteners
securing the lift cylinder rod-end pivot pin to
the boom.
4
Using a lifting strap from an overhead crane,
support the lift cylinder. Do not apply any lifting
pressure.
5
Use a soft metal drift to remove the lift cylinder
rod-end pivot pin. Remove the cylinder from
the boom.
Crushing hazard. The cylinder
could become unbalanced and
fall if not properly supported
when removed from the
machine.
6
Repeat this procedure beginning with step
3 for the other lift cylinder.
7
Remove the fastener securing the fork level
cylinder rod-end pivot pin to the fork frame
mount.
8
Use a soft metal drift to remove the rod-end
pivot pin.
9
Attach a lifting strap from an overhead crane to
the barrel end of the fork level cylinder.
Support the cylinder. Do not apply any lifting
pressure.
10 Tag, disconnect and plug the fork level cylinder
hoses from the cylinder manifolds. Cap the
fittings.
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.
Component damage hazard.
Hoses can be damaged if they
are kinked or pinched.
11 Remove the fasteners securing the fork level
cylinder barrel-end pivot pin to the boom.
12 Use a soft metal drift to remove the pivot pin.
Remove the cylinder from the boom.
Crushing hazard. The cylinder
could fall if not properly
supported when the pivot pin is
removed from the machine.
13 Remove the inspection cover at the pivot end
of the boom.
14 Remove the hose keepers from the hose roller
assembly.
Note: The hose keepers ensure that the hoses do
not jump off the hose rollers.
Summary of Contents for GTH-844
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Page 61: ...April 2017 Service and Repair Manual Manifolds Part No 1272854 GTH 844 49...
Page 63: ...April 2017 Service and Repair Manual Manifolds Part No 1272854 GTH 844 51...
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Page 67: ...April 2017 Service and Repair Manual Manifolds Part No 1272854 GTH 844 55...
Page 151: ...April 2017 Service and Repair Manual 139 Harness Map Options Work Lights to 15 21456...
Page 155: ...April 2017 Service and Repair Manual 143 Harness Map Options Road Lights to 15 21456...
Page 159: ...April 2017 Service and Repair Manual 147 Harness Map Options Enclosed Cab with Heater...
Page 162: ...Service and Repair Manual April 2017 150 Harness Map Options Enclosed Cab with HVAC...
Page 163: ...April 2017 Service and Repair Manual 151 Electrical Schematic View 1 to 15 20661...
Page 166: ...Service and Repair Manual April 2017 154 Electrical Schematic View 2 to 15 20661...
Page 167: ...April 2017 Service and Repair Manual 155 Electrical Schematic View 1 from 15 20662 to 21456...
Page 170: ...Service and Repair Manual April 2017 158 Electrical Schematic View 2 from 15 20662 to 21456...
Page 171: ...April 2017 Service and Repair Manual 159 Electrical Schematic View 1 from 15 21457 to 21535...
Page 174: ...Service and Repair Manual April 2017 162 Electrical Schematic View 2 from 15 21457 to 21535...
Page 175: ...April 2017 Service and Repair Manual 163 Electrical Schematic View 1 from 15 21536 16E 10000...
Page 178: ...Service and Repair Manual April 2017 166 Electrical Schematic View 2 from 15 21536 16E 10000...
Page 179: ...April 2017 Service and Repair Manual 167 Hydraulic Schematic Single Joystick to 19528...
Page 183: ...April 2017 Service and Repair Manual 171 Hydraulic Schematic Dual Joystick to 19528...