Section 4 • Repair Procedures
REV A
September 2016
4 - 34
GRC
Part No. 227123
MAST COMPONENTS
15 Slide the number 3 mast towards the bottom of
the number 2 mast and align the upper and
lower number 3 mast access holes to the upper
and lower rivets on the number 2 mast. Refer to
Illustration 4.
Illustration 4
a
wear pads
b
rivets
c
number 3 mast
d
number 2 mast
e
number 1 mast
16 Using a drill, carefully drill out the rivets
securing the number 2 outer wear pads to the
top half of the number 2 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.
17 Using a drill, carefully drill out the rivets
securing the number 3 inner wear pads to the
bottom half of the number 3 mast section. Refer
to Illustration 5.
Illustration 5
a
number 3 mast
b
rivet
c
wear pads
d
number 1 mast
e
number 2 mast
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.
18 Attach a lifting strap from an overhead crane to
the number 3 mast section and carefully
remove the number 3 mast.
Crushing hazard. The number 3
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.
