OPERATING CONTROLS AND PROCEDURES
OPERATOR MANUAL 600E2
3-6
PUBLISHED 04-26-2019 CONTROL # 113-09
HOIST SYSTEM OPERATION
The hoist is mounted at the rear of the boom and has
capacities independent from the rest of the crane The hoist
can normally pull more than the crane itself can withstand.
Therefore, care must be taken to insure that the load being
lifted is within boom rating. To lift some of the heavier loads
on the load chart, it will be necessary to multiple part reeve
the hoist block to increase the lifting capacity of the hoist (the
speeds will be proportionately slower) and remain in the
strength limitations of the hoist and wire rope.
Using Multiple Part Lines
The hoist load rating chart on each machine provides the
information for pull limitations on the hoist with various
applicable part reevings. These ratings are based on
providing the proper operating safety factor on the wire rope
supplied with the machine. Therefore, any replacement rope
must meet the rope specification sections of this manual.
General Rules When Operating Hoist
1.
Always payout the loadline while extending the boom.
This will maintain clearance between the boom tip and
loadline hook.
2.
Do not rely on the ATB System to eliminate two blocking.
Use the system as a backup to safe operation.
3.
Make certain the hoist cables are not twisted or kinked
and that cables are properly seated on the drum and in
the sheaves.
4.
Before lifting a load, always make certain that three full
wraps of wire or synthetic rope will remain on the drum
at all times throughout the lift.
5.
When lifting a load approaching the rated hoist load,
raise the load a few inches and return the control to
neutral to determine if the brake is working properly.
6.
Do not drag loads in any direction with the hoist.
7.
Never attempt to lift loads which are not loose and free,
such as frozen down material or poles out of ground.
8.
Maintain tension on the loadline at all times to prevent
the cable from becoming twisted or kinked or improperly
seated on the hoist drum or sheaves.
Lifting the Load
After the vehicle and crane have been properly set up and it
has been determined the load to be lifted is within the ratings
of the crane and hoist reeving system proceed with lifting the
load.
1.
Rotate, extend or move up or down until boom tips
directly over the load.
2.
The crane is normally equipped with a rotation stop. It is
important that you be aware of the position of the stop
before lifting in order to assure maximum rotation and
prevent excessive handling of the load.
3.
During operations, the controls should always be
metered when beginning or terminating movement to
prevent sudden starting or stopping, which imposes
undue shock loads on the equipment. This is especially
true when handling heavy loads. The control should be
slightly actuated to begin movement and then slowly
increased to desired operating speed. The results
obtained from metering the oil flow with the control lever
can also be aided by carefully coordinating the throttle
control.
4.
Lower loadline and attach load.
5.
Control load by use of a non-conductive tag line.
6.
Do not leave crane unattended with the boom elevated
in operating position. Always secure the boom in the
boom rest before leaving the work area.
7636
FIGURE 3-2
Fo
r
Reference
Only
Содержание National Crane 600E-2
Страница 1: ...Operator Manual National Crane 600E 2 F o r R e f e r e n c e O n l y ...
Страница 2: ...F o r R e f e r e n c e O n l y ...
Страница 10: ...TOC 6 TABLE OF CONTENTS OPERATOR MANUAL 600E2 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 121: ...F o r R e f e r e n c e O n l y ...
Страница 122: ...F o r R e f e r e n c e O n l y ...