3 - 52
S-100 • S-105 • S-120 • S-125
Part No. 1268494
March 2017
Section 3 • Repair Procedures
BOOM COMPONENTS
How to Replace the Boom Extend/
Retract Cables
Note: The cable pulleys must also be replaced
when replacing the cables.
1 Remove the boom extension cylinder. See 4-4,
How to Remove the Primary Boom Extension
Cylinder.
Boom extend cables:
2 Remove the retaining fasteners that secure the
extension cable retainer to the pulley mount.
Remove the retainer.
3 Remove the cables from the lower boom extend
cable bracket that attaches to the number 3
boom tube.
4 Remove the front and rear fasteners from the
anchor bracket that supports the cable anchors.
Remove the bracket.
5 Remove the pulley and boom extend cables
from the extension cylinder assembly. Discard
the old cables and pulleys.
6 Route the new boom extend cables through the
boom extend pulley bracket.
Note: Be sure before installing the extend cables
through the boom adjustment coupling that the tall
end of the cable anchors are facing down.
7 Install the new boom extend cable pulley, pivot
pin and snap rings.
Note: Be sure the boom extend cables are routed
through the grooves of the pulley and the upper
wear pad on the extension cylinder.
8 Install the boom extend cables to the lower
extend cable bracket that mounts to the number
3 boom tube.
m figure 3 platform end
n figure 2, boom tube 3
o figure 1, pivot end
Illustration 4
Boom Tube One
Boom Tube Two
Boom Tube Three
Boom Tube One
o
n
m
17 Extend the boom approximately 2 feet / 0.6 m.
18 Retract the boom. While retracting the boom,
visually inspect the number 2 and number 3
boom tubes.
Result: The number 2 should not move more
than
1
/
2
inch (13 mm) before the number 3
boom tube begins to retract.
Note: If the number 2 boom tube moves more than
1
/
2
inch (13 mm) before the number 3 boom tube
begins to retract, repeat the procedure until the
number 2 boom moves less than
1
/
2
inch before
the number 3 boom begins to retract
.
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