Genie GTH-636 Service Manual page 77

June 2007
REV C
9 Remove the fasteners securing the chain
tensioner of the number 3 extension chain to
the number 1 boom tube.
10 Remove the fasteners securing the fixed chain
block of the number 3 retraction chain to the
number 1 boom tube.
Note: The fixed chain block of the number 3
retraction chain is secured to the inside of the
number 1 boom tube and is hidden from view when
installed.
11 Extend the number 2 boom tube assembly
enough to access the inner wear pads of the
number 1 boom tube.
12 Remove the top and side wear pads of the
number 1 boom tube at the fork end of the
boom.
13 Using a chain of sufficient capacity, secure
together the numbers 2 and 3 boom tubes.
14 Attach a lifting strap from an overhead crane to
the numbers 2 and 3 boom tube assembly at
the fork end of the boom.
15 Support and slide the numbers 2 and 3 boom
tube assembly approximately halfway out of the
number 1 boom tube.
Crushing hazard. The boom
assembly may become
unbalanced and fall when the
numbers 2 and 3 boom tubes are
moved if not secured together.
Part No. 97487 GTH-636 • GTH-644 • GTH-842 • GTH-844 • GTH-1048 • GTH-1056
Section 4 • Repair Procedures
16 Using the crane, raise the front end of the
numbers 2 and 3 boom tube assembly slightly
and remove the bottom wear pads of the
number 1 boom tube.
17 Support and slide the numbers 2 and 3 boom
tube assembly out of the number 1 boom tube.
Place the numbers 2 and 3 boom tube
assembly on a structure capable of supporting
it.
Crushing hazard. The numbers 2
and 3 boom tube assembly may
become unbalanced and fall when
removed from the number 1 boom
tube if not properly supported and
attached to the overhead crane.
Note: During removal, the overhead crane strap
will need to be adjusted for proper balancing.
18 Remove the fork level cylinder hydraulic hoses
from the boom assembly.
19 Remove the fasteners securing the extension
chain pivot pin to the number 3 boom tube.
20 Use a soft metal drift to remove the pivot pin.
Remove the chain and set it to the side.
Note: Do not allow the chain to become twisted or
dirty.
21 Extend the number 3 boom tube enough to
access the inner wear pads of the number 2
boom tube.
22 Remove the top and side wear pads of the
number 2 boom tube at the fork end of the
boom.
BOOM COMPONENTS
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