Harrington Hoists and Cranes MCR Trolley - Manual (Page 21)

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3.5 Air Supply System Requirements
3.5.1
NOTICE
Pressure and Flow - Verify that the air supply system has capacity to supply your
air trolley hoist with required pressure and flow. Otherwise the hoist may operate poorly or may fail to
operate. See
Section 3.6 .
3.5.2
CAUTION
Lubrication - The trolley hoist requires lubrication for proper operation. The oil in
the air supply is the primary source of lubrication to the hoist. Therefore, a dedicated air supply
lubricator must be used with the trolley hoist. Refer to
Section 3.7 .
3.5.3
CAUTION
Air Quality - Good air quality is essential to prevent damage to your trolley hoist
and to ensure its proper operation. The air must be clean and free of debris such as dirt and rust.
Refer to
Section 3.8 for filtration requirements. The air must also be dry; free of moisture and water.
Refer to Section 3.9 .
3.6 Air Supply Capacity And Regulation
3.6.1 Capacity - The air supply system must be capable of delivering the required airflow (cfm) to the trolley
air supply inlet port. Without the required airflow the hoist will not operate properly or may not operate
at all. See
Section 2.0 for your trolley hoist air consumption requirements. In determining if your
system is capable of supplying the required airflow, consider the following:
Capacity of compressor(s) and tank
Other air consuming equipment
Flow restrictions such as pipes, hoses, valves and fittings
Inadequate capacity will cause a significant drop in pressure when the hoist or trolley is operated, and
could cause poor performance or failure to operate.
3.6.2 Regulation - The trolley hoist requires a constant supply of air at a pressure of between 60 and 90 psi.
If the air supply is not regulated or is regulated at a pressure greater than 90 psi, then a regulator must
be used. The regulator may be located anywhere upline of the lubricator in the air supply to the hoist.
3.7 Lubrication
3.7.1
CAUTION
The trolley hoist must be supplied with its own lubricator. The lubricator must be
located as follows:
1) Best location - At the trolley inlet. In this case the lubricator can be either the mist type or drop
type.
2) Second best location - No more than 15 feet away from the trolley hoist, at the same elevation
or above the trolley inlet. In this case the mist type lubricator must be used.
3) Third best location - No more than 15 feet away below the trolley hoist. In this case the mist
type lubricator must be used.
3.7.2
CAUTION
The lubricator must be set to deliver the equivalent of 10 to 15 drops of oil per
minute (2 to 3 cc/minute). The hoist and trolley exhaust will emit a fine oil mist when properly
lubricated.