4-16
Published 01-29-2014, Control # 496-00
BOOM TMS800E SERVICE MANUAL
Adjustment
At near fully extended boom length, during sudden extension
after retracting the boom some distance, and with high
telescoping speeds, the extension cables may slap the
inside of the boom section. This will make a somewhat
audible noise, however this will not cause any damage and is
acceptable. If the cables do not make a slapping noise under
these conditions, it is an indication that the extension cables
may be too tight and should be readjusted. Be aware that
there may also be a similar noise made by the telescope
cylinder rod mount at the rear of the base section and tele 1
and confusion between the two could be experienced.
NOTE: The extension cables must be adjusted properly
before the retract cables can be adjusted.
1. Extend and set the outriggers, ensuring the crane is
level.
2. Ensure the boom is over the front and at a horizontal
position (boom angle elevation 0 degrees or lower).
3. Extend boom until the front end of the lower telescope
cylinder is accessible through the holes in tele 2 and tele
1.
4. With the front of the boom in the above position, extend
the boom approximately 25 mm (1.0 in) to relieve the
tension in the retract cables. Access the retract cables
from the front of the boom nose and view the slack of the
retract cables through the hole in the back plate of the
boom nose. Using the nuts on the retract cables, remove
slack evenly, until both retract cables are at least 25 mm
(1.0 in) above the lower leg of the cable retainer bars on
the sheave mount on the upper telescope cylinder.
5. Retract the boom approximately 25 mm (1.0 in) to
relieve tension on the extension cables. Shut down the
crane. Evenly tighten the swivel nuts on the adjusting
bolts, until the extension cables are up 150 mm (6 in) off
the top of the bottom pad plate at the back of the tele 3
section. Look through the holes in the boom sections to
see the slack in cables.
6. Lock the adjustments with the jam nuts.
NOTE: During retract cable adjustments, tele 1 must
remain fully extended.
7. Extend the boom until tele 2/tele 3 extends several cm
(in).
8. Adjust retract cables so that tele 3 section stop block
bottoms out 3 mm (.12 in) before the stop block on tele 2
bottoms out.
9. If stop block on tele 3 cannot be properly adjusted
without excessive thread 114 mm (4.5 in) protruding out
from the jam nuts, back off the nuts on the retract cables
25 mm (1.0 in) and back off the swivel nuts 25 mm (1.0
in).
10. Adjust retract cables until stop block on tele 3 bottoms
out properly. Install jam nuts.
11. If the retract cables can still not be adjusted properly,
remove all the tension in the retract and extension
cables and return to step 1.
CAUTION
When adjusting cables, hold the cable end and turn the
nut. Do not turn cable. Turning cable while adjusting will
result in damage or failure of cable.
CAUTION
Overtightening of the retract cable will damage the cable.
Take care when retracting the boom fully, while adjusting
the cable, to avoid full boom retraction if the tele 3 section
contacts its stop block more than 3 mm (.125 in) before
tele 2 contacts its stop block on tele 1.
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