Four Section Boom Operation-common EEC-0021 V1.3
Four Section Boom Operation
D. Torque the large extend cables to 22 ft-lb (12.2 N.m). Cable adjustment point is
located at the rear of the boom on the cable anchor located in the rear of the 2
nd
section.
E. Torque 3/2/1 retract cables to 9 ft-lb (12.2 N.m). Cable adjustment point is
located at the sheave case end of the boom, on the bottom of the 1
st
section. Use
the flats at the front of the cable ends to keep the cables from turning while
torqueing retainer nuts.
F. Torque 1/2/3 extend cable to 9 ft-lb (12.2N.m). Cable adjustment point is located
at rear of boom on the winch crossbar spanning the 1
st
section.
G. Repeat steps 4,5,6 and 7, torqueing the 4/3/2 retract cables to 14 ft-lb (19 N.m).
Torque the large extend cables to 45 ft-lb (61 N.m). The 3/2/3 retract cables to 18
ft-lb (24 N.m) and the 1/2/3 extend cable to 18 ft-lb (24 N.m).
H. Cycle the boom fully, check that all the cables are torqued properly and that all
sections are retracted completely, utilizing scribe marks or bottoming position of
boom sections then add jam nuts to all cables. All threaded cable ends must be
equipped with retainer nuts and jam nuts.
2/3/4 Extend Cables
4/3/2 Retract Cables
1
s
Section 2
n
Section 3
r
Section 4
Section
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