Operation - Ingersoll-Rand 7700-E Series Installation, Operation And Maintenance Instructions

Operation

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• Do not operate this hoist before reading Product Information Manuals.
• Read all documentation supplied with the product.
• Contact factory if in doubt about installation, operation, inspection and maintenance
instructions.
• Do not discard manuals. Keep manuals readily available for all personnel.
OPERATE HOIST CAUTIOUSLY to become familiar with the performance of the hoist. Hoist shall be operated from a
position that will not be hazardous to the operator. Abrupt operation, resulting from "jerking" of controls, should be
avoided.
The rate of lift or descent of any ARO
and pendant controls provide unlimited variation between full speed and the slowest "INCHING" movement. This
is accomplished by movement of pull chain handles or pendant control levers. Pulling down on pull chain control as
far as possible or depressing pendant control levers fully will result in maximum hoist speed.
On pendant control models, the control handle is supported by a strain cable to prevent stress on hoses.
BEFORE STARTING TO LIFT, ensure chain is properly seated in the sprockets (or pocket wheel). Do not lift or move
load more than a few inches until load is well balanced in sling or lifting device. Care shall be taken in hoisting to
ensure that chain is not kinked or twisted and load does not contact any obstruction Be certain hoist is centered
over load to prevent danger of load swinging when lifted. Side or end pulling should always be avoided. Take up
slack chain carefully to avoid overstress caused by jerking load when lifting. Be certain that safety latch on load
hook is properly closed. On 1 ton link chain models to avoid jamming of chain in lower block, allow only sufficient
slack in chain to permit attaching hook to load.
DO NOT wrap the hoist chain around the load. The load shall be attached to the hook by means of slings or other
approved devices and shall be properly seated in the saddle of the hook.
The maximum lift rate of a hoist is constant, provided that air pressure and load are also constant. The maximum
descent rate of a hoist, with the exception of sparkresistant models (see spark-resistant hoist section), can be varied
within fixed limits by means of regulating valves located on the underside of the head housing.
Hoists are shipped from the factory with regulator valves preset for rate of descent and fastest rate of lift. If a faster
rate of descent is desired, turn regulator valve clockwise by small increments while testing with desired or rated
load attached. If a slower rate of lift is desired, turn regulator valve counterclockwise by small increments while
testing with desired or rated load.
The operator shall test the brakes each time a load approaching the rated load is handled by raising the load just
enough to clear the floor, or supports, and checking for proper brake action and lift continued only if brake is
functioning properly.
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• DO NOT OPERATE HOIST WITHOUT CHAIN STOP ATTACHED PROPERLY TO HOIST LOAD
CHAIN. DO NOT USE CHAIN STOP AS A LIMIT SWITCH (to stop hoist when operating in the
"up" mode). The chain stop function is to keep the lower hook components (lower block on 1
ton models) from striking control arm (37719) should an over-run condition ever occur.
• DO NOT EXCEED RATED LOAD CAPACITY OF HOIST.
• DO NOT OPERATE HOIST OVER PEOPLE.
W W A A R R N N I I N N G G
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chain hoist can be governed manually by the operator, both the pull chain
C C A A U U T T I I O O N N
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