Section 4 • Repair Procedures
March 2015
4 - 8
GTH-1048 • GTH-1056
Part No. 123701
BOOM COMPONENTS
20 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 removed
in step 11. Securely tighten the fasteners. Do
not over tighten.
21
GTH-1056:
Repeat this procedure, beginning
with step 11, for the remaining chain anchor.
22 Install the inspection cover, removed in step 9,
onto the boom. Install and securely tighten the
fasteners. Do not over tighten.
23
GTH-1056:
Working at the fork end of boom
tube number 1, install the dual-chain tensioner
into the tensioner mount. Install the mounting
components, removed in step 6, and securely
tighten the fasteners.
24
GTH-1056:
Install the chain tensioners into the
tensioner mount at the fork end of boom tube
number 0. Install the mounting components,
removed in step 7. Evenly tighten the chain
tensioners to the top of the boom tube until they
are securely tightened.
25
GTH-1048:
Install the chain tensioners into the
tensioner mount at the fork end of boom tube
number 1. Install the mounting components,
removed in step 8. Evenly tighten the chain
tensioners to the top of the boom tube until they
are securely tightened.
26 Adjust the chains. Refer to Maintenance
Procedure D-2,
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.
How to Replace the Extension
Chains
Note: Perform this procedure on a firm, level
surface with the boom in the stowed position and
the wheels chocked.
1 Start the engine and allow the engine to idle.
2 Raise the boom to a horizontal position.
3 Fully retract the boom.
4 Turn the machine off and remove the key from
the key switch.
5
GTH-1056:
Working at the fork end of the
boom, loosen the fasteners securing the
dual-chain tensioner to the top of boom tube
number 1. After noting the orientation and
assembly order of the components, remove the
fasteners and pull the tensioner free of the
boom. Refer to Illustration 1.
Illustration 1
a
tube 3 extension chains
b
dual-chain tensioner
c
tube 2 extension chains
d
single-chain tensioner
e
boom tube number 0
f
boom tube number 1
g
boom tube number 2
h
boom tube number 3
h
g
f
e
a
b
c
d
Summary of Contents for GTH-1048
Page 6: ...May 2015 GTH 1048 GTH 1056 Part No 123701 vi This page intentionally left blank ...
Page 174: ...Section 6 Schematics May 2015 6 11 Harness Map Control System Power Single Joystick 6 12 ...
Page 177: ...May 2015 Section 6 Schematics 6 14 Harness Map Control System Ground Single Joystick 6 13 ...
Page 178: ...Section 6 Schematics May 2015 6 15 Harness Map Control System Power Dual Joystick 6 16 ...
Page 181: ...May 2015 Section 6 Schematics 6 18 Harness Map Control System Ground Dual Joystick 6 17 ...
Page 190: ...Section 6 Schematics May 2015 6 27 Harness Map Options Work Lights 6 28 ...
Page 193: ...May 2015 Section 6 Schematics 6 30 Harness Map Options Road Lights 6 29 ...
Page 194: ...Section 6 Schematics May 2015 6 31 Harness Map Options Enclosed Cab with Heater 6 32 ...
Page 197: ...May 2015 Section 6 Schematics 6 34 Harness Map Options Enclosed Cab with HVAC 6 33 ...
Page 210: ...Section 6 Schematics May 2015 6 47 Hydraulic Schematic Models with Single Joystick 6 48 ...
Page 213: ...May 2015 Section 6 Schematics 6 50 Hydraulic Schematic Models with Dual Joystick 6 49 ...
Page 214: ......