Ingersoll Rand MLK Serie Manual De Instalación Y Operación página 7

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Always use an air line filter and lubricator with the hoist.
Air Line Lubricator
Always use an air line lubricator with these hoists. Use a lubricator having an inlet and outlet at least
as large as the inlet on the hoist motor. Install the air line lubricator as close to the air inlet on the
hoist motor as possible.
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Lubricator must be located no more than 3 m (10 ft) from the hoist motor.
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Shut off air supply before filling air line lubricator.
The air line lubricator should be replenished daily and set to provide lubrication at a minimum rate
of 1 to 3 drops per minute adjusted at maximum hoist speed, of SAE 10W oil or a good grade of
hydraulic oil.
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Do not use automotive type detergent oil. Detergents will delaminate the MLK and HLK
hoist motor vanes and cause premature failure.
Air Line Filter
It is recommended that an air line strainer/filter be installed as close as practical to the motor air inlet
port to prevent dirt from entering the motor. The strainer/filter should provide 10 micron filtration
and include a moisture trap. Clean the strainer/filter monthly to maintain its operating efficiency.
Moisture in Air Lines
Moisture that reaches the air motor through the supply lines is the chief factor in determining the
length of time between service overhauls. Moisture traps can help to eliminate moisture. Other
methods, such as an air receiver which collects moisture before it reaches the motor or an aftercooler
at the compressor that cools the air prior to distribution through the supply lines, are also helpful.
Overload Device
An overload device is required on all hoists with a rated capacity of over 1 metric ton (2,200 lbs) used
for lifting applications.
The overload device is integrated into the hoist air motor and prevents the hoist from lifting a load
greater than the overload value listed in the specifications chart. If an overload is detected, inlet
supply air is stopped and the hoist will not operate.
If the overload device is activated the load must be lowered and reduced. Alternative methods should
be used to accomplish the task. To lower the load reset the hoist by pressing the "ON" button of the
emergency stop device and press the hoist control lever to lower.
Adjustment of Bleed Screws on MLK and HLK Pendent Control Hoists
The two bleed adjustment screws, located under the valve chest, used on MLK and HLK hoists with
a pendent control are factory adjusted to provide optimum control and performance at 6.3 bar/
630 kPa (90 psig) air pressure. If the hoist is used with other air supply pressures, the bleed
adjustment screws may require readjustment.
For maximum performance and control, adjust the bleed screws as follows:
1. Loosen the adjustment screw locknut.
2. Back out the adjustment screw approximately one third (1/3) of a turn.
NOTICE
NOTICE
NOTICE
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