Genie GTH-636 Service Manual page 79

June 2007
REV C
9 Use a soft metal drift to remove the pivot pin.
Remove the cylinder from the machine.
Crushing hazard. The cylinder will
fall if not properly supported when
the pivot pin is removed from the
machine.
10 Working at the top of the boom assembly, tag,
disconnect and plug the fork level hoses from
the manifold at the top of the number 1 boom
tube.
a b c
GTH-636
GTH-1048
i h
a number 1 boom tube
b chain tensioner
c extension chain
d number 2 boom tube
e number 3 boom tube
f front cover
g boom roller
h support loop
i extension cylinder
a b c
a retraction chain
b extension chain
c fixed chain block
d chain tensioner
Part No. 97487 GTH-636 • GTH-644 • GTH-842 • GTH-844 • GTH-1048 • GTH-1056
d e f
g g
d
Section 4 • Repair Procedures
11 Remove the fastener(s) securing the chain
tensioner of the number 3 extension chain(s) to
the number 1 boom tube.
Note: The GTH-636 has one chain; the GTH-1048
has two chains.
12 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.
13 Attach a lifting strap from an overhead crane to
the extension cylinder. Support the cylinder. Do
not apply any lifting pressure.
14 Remove the nut securing the rod end of the
extension cylinder to the number 2 boom tube.
15 Extend the number 2 boom tube assembly
enough to access the inner wear pads of the
number 1 boom tube.
Crushing hazard. The extension
cylinder could fall if not properly
supported when the number 2
boom tube assembly is extended.
16 Remove the wear pads of the number 1 boom
tube at the fork end of the boom.
17 Using a chain of sufficient capacity, secure
together the numbers 2 and 3 boom tubes.
18 Attach a lifting strap from an overhead crane to
the numbers 2 and 3 boom tube assembly at
the fork end of the boom.
BOOM COMPONENTS
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