Air Lines
Inside diameter of winch air supply lines must not be less than sizes shown in Table 4 on page 11. Before making final connections, all air supply lines should be purged with clean, moisture free air or nitrogen before connecting to winch inlet. Supply lines should be as short and straight as installation conditions will permit. Long transmission lines and excessive use of fittings, elbows, tees, globe valves etc. cause a reduction in pressure due to restrictions and surface friction in lines.
Table 4–Minimum Allowable Air Supply Line Sizes
Model | inch | mm | |
FA5 |
| 38 | |
| |||
FA5T | |||
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Air Line Lubricator |
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Refer to Dwg. MHP0191 on page 11.
Always use an air line lubricator with these motors. The lubricator must have an inlet and outlet at least as large as inlet on motor. Install air line lubricator as close to air inlet on motor as possible.
CAUTION
•Lubricator must be located no more than 10 ft. (3 m) from motor.
•Shut off air supply before filling air line lubricator.
The air line lubricator should be replenished daily and set to provide 6 to 9 drops per minute of ISO VG 32 (SAE 10W) oil. A fine mist will be exhausted from throttle control valve when air line lubricator is functioning properly.
Air Line Filter
Refer to Dwg. MHP0191 on page 11.
It is recommended that an air line strainer/filter be installed as close as practical to motor air inlet port, but before lubricator, to prevent dirt from entering valve and motor. The strainer/filter should provide 20 micron filtration and include a moisture trap. Clean the strainer/filter periodically to maintain its operating efficiency.
Air Out
Regulator
Air In
Lubricator
Filter
(Dwg. MHP0191)
Air Pressure Regulator
If an air pressure regulator is used, install between lubricator and filter. Refer to Dwg. MHP0191 on page 11.
Moisture in Air Lines
Moisture that reaches the air motor through air supply lines is a primary 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 motor or an aftercooler at compressor that cools air to condense and collect moisture prior to distribution through supply lines are also helpful.
Mufflers
Make sure mufflers are installed in winch exhaust manifold and control valve exhaust port. An additional muffler is used on winches equipped with an emergency stop and overload device. Check mufflers periodically to ensure they are functioning correctly.
Motor
For optimum performance and maximum durability of parts, provide an air supply of 90 psig at 700 scfm (6.3 bar/630 kPa at 20 cu. m/m) as measured at motor inlet. The air motor should be installed as near as possible to compressor or air receiver.
Emergency Stop and Overload System (optional feature)
Refer to Dwg. MHP1492 on page 12. old style
The air supply line is connected to the shutoff valve which is connected to the air control valve. When Emergency Stop valve is activated, a pilot signal is sent to the shut off pilot valve which directs shutoff valve to cut off air to winch, immediately stopping all winch movement.
CAUTION
•If winch continues to move (payout load) after shutoff valve activates, brake(s) are not holding load and need to be adjusted or repaired.
The overload system also activates shutoff valve. When
MHD56037 - Edition 5 | 11 |
