Service and Repair Manual
April 2017
Boom Components
22
GTH-844
Part No. 1272854
7
Remove the inspection cover from the pivot
end of the boom. Locate the chain anchor of
the boom retraction chain where it attaches to
the chain anchor mount at the lower side of
boom tube 3.
1 retract chain anchor
8
Remove a cotter pin securing the chain anchor
pivot pin to the anchor mount of the boom tube.
Remove the pivot pin and pull the chain free of
the mount.
9
Working at the pivot end of the boom, pull the
chain out of the boom.
10 Remove the chain anchor from the chain and
install it on the new chain.
Note: Always use new cotter pins when installing a
chain
11 Feed an electrical 'fish tape' through the boom
from the front and attach it to the new chain.
Also attach a short rope to the pivot end of the
chain.
12 Working at the fork end of the boom, use the
tape to carefully pull the chain through the
boom just until the end of the chain is
accessible. Remove the tape from the chain.
13 Now pull the chain carefully toward the pivot
end until the mounting holes of the chain
anchor line up with the holes on the boom
tube. Install the fasteners securing the chain to
the bottom of the boom tube.
14 Working at the pivot end of the boom, route the
chain over the roller and install the chain onto
the boom assembly using the pivot pin and
retaining clip removed in step 8.
15 Check the tension on the extension chains.
Refer to Maintenance Procedure,
Adjust the
Boom Sequencing Chains
.
Component damage hazard.
Chains can be damaged if the
boom is used while the chains
are out of adjustment. Do not
return the machine to use until
the chains have been correctly
adjusted.
Summary of Contents for GTH-844
Page 12: ......
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...
Page 65: ...April 2017 Service and Repair Manual Manifolds Part No 1272854 GTH 844 53...
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...