4-6
GTH-1256 AF
Part No. 57.4400.9219
September 2017
Section 4 • Repair Procedures
How to Replace the Boom
Extend Chains
Note: Perform this procedure on a
fi
rm, level
surface with 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 At the pivot end of the boom, remove pins "l"
and pulleys "m".
6 Remove the lower screws securing the lower
chains "f" - "g".
a boom tube number 1
b boom tube number 2
c boom tube number 3
d boom tube number 4
e extend
cylinder
f
extend chain tube number 1
g extend chain tube number 2
h tube number 1 extend chain locking device
i
tube number 2 extend chain locking device
a
e
b
h
i
f
g
c
d
l
m
BOOM COMPONENTS
