Section 4 • Repair Procedures
REV A
September 2016
Part No. 227123 GRC 4 - 33
10 Attach a lifting strap from an overhead crane
to the mast assembly and carefully rotate the
mast 180°. Set the mast assembly onto the
work table and secure the mast to the table.
Crushing hazard. The mast
assembly could become
unbalanced and fall if not properly
supported.
Note: During installation, the overhead crane strap
will need to be carefully adjusted for proper
balancing.
11 Slide the number 4 mast towards the bottom of
the number 3 mast and align the upper and
lower number 4 mast access holes to the upper
and lower rivets on the number 3 mast. Refer to
Illustration 2.
13 Using a drill, carefully drill out the rivets
securing the number 4 inner wear pads to the
bottom half of the number 4 mast section. Refer
to Illustration 3
MAST COMPONENTS
Illustration 2
a wear pads
b rivets
c number 4 mast
d number 3 mast
e number 2 mast
f number 1 mast
12 Using a drill, carefully drill out the rivets
securing the number 3 outer wear pads to the
top half of the number 3 mast section. Refer to
Illustration 2.
Note: While drilling the rivets out, be careful not
drill into the number 2 mast section.
Note: While drilling the rivets out, be careful not
enlarge the wear pad mounting holes.
Illustration 3
a number 4 mast
b rivet
c wear pads
d number 1 mast
e number 2 mast
f number 3 mast
Note: While drilling the rivets out, be careful not
drill into the number 3 mast section.
Note: While drilling the rivets out, be careful not
enlarge the wear pad mounting holes.
14 Attach a lifting strap from an overhead crane to
the number 4 mast section and carefully
remove the number 4 mast.
Crushing hazard. The number 4
mast section could become
unbalanced and fall if not properly
supported when removed from the
mast assembly.
Note: During removal, the overhead crane strap
will need to be carefully adjusted for proper
balancing.
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