Terex Genie GR-20J, Service Manual

Page: 63 / 127

March 2022 Service Manual
Repair Procedures
Part No. 1312899GT GR ™ -20J • GR ™ -26J 51
8 Slide the number 2 mast and the number
3 mast towards the top of the number 1 mast
to gain the access to the stops at the bottom
of the number 1 mast.
9 Remove the fasteners securing stops to the
inside of the number 1 mast. Remove the
stops. Set the fasteners and stops to the side.
10 Push the number 3 mast fully into the number
2 mast. Working from the bottom of the
number 1 mast, pull the number 2 mast and
the number 3 mast half way out.
11 Attach a lifting strap from an overhead crane
to the number 2 mast section. Remove both
the number 2 mast and the number 3 mast
while carefully pulling the assembly out from
the bottom of the number 1 mast. With the 'P'
mark facing upwards, place the number
2 mast and the number 3 mast assembly on a
level workbench capable of supporting it.
Note: During removal, the lifting strap will need to
be adjusted for proper balancing.
12 Slide the number 3 mast towards the top of
the number 2 mast to gain the access to the
stops at the bottom of the number 2 mast.
13 Remove the fasteners securing stops to the
inside of the number 2 mast. Remove the
stops. Set the fasteners and stops to the side.
14 Working from the bottom of the number
2 mast, pull the number 3 mast half way out.
15 Attach a lifting strap from an overhead
supporting device to the number 3 mast
section. Remove the number 3 mast while
carefully pulling the it out from the bottom of
the number 2 mast. With the 'P' mark facing
upwards, place the number 3 mast on a level
workbench capable of supporting it.
Note: During removal, the lifting strap will need to
be adjusted for proper balancing.
16 Tag and remove the outer wear pads and
shims from the bottom of the number 4 mast
section. Set the shims to the side. Discard the
wear pads.
Note: For ease of mast reassembly, make careful
note of the location, order and orientation of the
shims.
Note: Use a hammer and chisel if necessary to
gently loosen the wear pads from the mast.
17 Tag and remove the outer wear pads and
shims from the bottom of the number 3 mast
section. Set the shims to the side. Discard the
wear pads.
Note: For ease of reassembly of the mast, make
careful note of the location, order and orientation
of the shims.
Note: Use a hammer and chisel if necessary to
gently loosen the wear pads from the mast.