September 2017
Part No. 57.4400.9219
GTH-1256 AF
4-3
Section 4 • Repair Procedures
Boom Components
1-1
Boom
How to Replace the
Boom Wear Pads
1 Extend the boom until the wear pads are
accessible.
2 Lower wear pads: Using a lifting strap from
an overhead crane or a fork lift of suf
fi
cient
capacity, lift the boom tube just enough to
remove the weight from the pads.
3 Remove the wear pad retainer plates and
remove the wear pads from the boom.
4 Lubricate the wear surface of the new pads.
Refer to Maintenance Procedure A-4, Lubricate
the Boom.
Note: Do not lubricate the side wear pads.
5 Install the wear pads. Install and securely
tighten the retainer plates. Do not over tighten.
How to Remove the Lifting
Fork Frame
1 With the boom in the stowed position, attach a
lifting strap from an overhead crane to the top
of the lifting fork frame at the front of the boom.
Support the frame. Do not apply any lifting
pressure.
2 Disconnect the quick-
fi
t connectors of
the hoses coming from the fork coupling
attachment from the tipping valve on boom tube
number 1.
WARNING
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.
3 Remove the lower locking pin, then remove the
fork coupling attachment from the machine.
4 Remove the screw securing the fork level
cylinder pivot pin to the lifting fork frame.
5 Use a soft metal drift to remove the pivot pin.
6 Remove the screw securing the fork frame
pivot pin to the boom.
7 Use a soft metal drift to remove the pivot pin.
8 Using the overhead crane, lift and remove the
fork frame from the boom.
CAUTION
Crushing hazard. The fork
frame could fall if not properly
supported when the lock pin is
removed from the machine.
