Link-Belt RTC-8090 II Operator's Manual page 17

15. Do not "two block" (pull the hook block, hook ball,
and/or the load into the head machinery) as this
can cause winch wire rope and sheave breakage
resulting in an accident.
16. After slack winch wire rope operation, ensure the
winch wire rope is properly seated in sheaves and
on drums before continuing to operate. Use a stick
or mallet to set the winch wire rope, not your
hands.
17. Do not lower the load beyond the point where less
than three full wraps of winch wire rope are left on
the drum. This condition could occur when lower­
ing a load beyond ground level. If all the winch wire
rope runs off the drum, the load will jerk which
could break the winch wire rope.
18. Ensure there is a safety latch on the hook, and that
it works properly. Without a latch, it is possible for
slings or chains to come off the hook, allowing the
load to fall.
19. Don't alter any part of the crane. Additions to or
changes in any part of the equipment can create
loadings for which the crane was not designed.
Such changes may seriously affect the usable ca­
pacities and make all capacities in the Crane Rat­
ing Manual invalid. Alterations can dangerously
overload or weaken critical parts and may cause
disastrous failure.
20. Do not exceed the rated capacities of the crane un­
der any circumstances. While a crane has more
stability when lifting over a corner (as compared to
straight over the side) the crane capacity is not in­
creased. Anytime the load exceeds the rated ca­
pacities listed in the Crane Rating Manual, the
crane is overloaded. Overloads can damage the
crane and such damage could cause failure and
accidents.
21. When operating on outriggers, all beams must be
equally extended; all fully retracted, all intermedi­
ate extended or all fully extended. Jacks must be
extended so all tires are clear of the ground, and
the crane must be level. Ensure that pontoons are
set on firm surface, adequate to support the block­
ing, pontoon, crane and load without settling, slip­
ping or collapsing. Blocking or matting under pon­
toons must form a smooth level surface under the
entire pontoon. Do not block under outrigger
beams inside the pontoons as this reduces stabil­
ity. Blocking must be under pontoons only. Re­
member-there are tremendous loadings on pon­
toons and blocking - the weight of the entire crane
plus any load.
Figure 1-9
Crane level, all beams extended equally (all
fully extended, intermediate extended, or fully
retracted) and tires clear of the ground.
When blocking or matting under pontoons, ensure
that each pontoon is supported fully - no unsup­
ported pontoon area is permissible. Ensure pon­
toons are on a smooth surface. Rough surface,
rocks, etc., under pontoons will cause unequal
loadings, and can puncture them, causing them to
collapse.
Capacities are based on all outriggers being equal­
ly extended: all fully retracted, all intermediate ex­
tended or all fully extended. Working on outriggers
that are not equally extended will reduce capaci­
ties and crane stability considerably and could
cause an accident. Do not make any lifts while on
outriggers without the outrigger beams equally ex­
tended.
Section 1 - Operating Instructions
Operator's Manual
Right
1-5