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M A I N T E N A N C E
FILTERS:
• Change inlet filter every 200 running hours or if the pressure gauge shows a drop in pressure.
• Change discharge filter every 200 running hours or if the pressure gauge shows an increase in pressure.
FLUSHING INSTRUCTIONS:
1. Perform this procedure in a well ventilated area.
2. Wear solvent resistant gloves and eye protection while performing the flushing procedure.
3. Disconnect airline hose and respirator to prevent contamination.
4. Remove inlet filter assembly and pressure relief valve, to prevent damage to pump from back pressure.
5. Add 10-15 squirts of flushing solvent, Allegro P/N: 9700-11, through the inlet port opening.
6. Turn pump on and let run for 1 minute to flush out contaminants.
7. Repeat flushing procedure if pump is in extremely dirty or is under performing.
8. Replace inlet filter assembly and pressure relief valve.
9. Replace exhaust filter and inlet filter.
10. Reconnect airline hose and respirator, do not use respirator until all steps are complete.
11. Turn pump on for 10 minutes, this allows the flushing solution to dry out completely.
AIR DRIVEN MOTOR: (P/N 9850)
1. Disconnect inlet plumbing from pump and muffler assembly.
2. Add 10-15 squirts of solvent into the inlet port.
3. Rotate the shaft by hand in both directions for a few minutes.
4. Reassemble plumbing and reconnect the inlet air supply line and slowly apply pressure.
5. Flushing liquid should slowly exit the exhaust port, let run for 10 minutes
6. Reassemble exhaust assembly.
WARNING!
Keep face away from exhaust port. DO NOT flush unit with KEROSENE OR OTHER COMBUSTIBLE
LIQUIDS. Personal injury and/or property damage will result.
LUBRICATION: (For Air Driven Pump Only P/N: 9850)
To lubricate the air motor (which drives air driven Model: A-400AD), use a detergent SAE #10 automotive engine
oil. DO NOT lubricate air pump. For proper operation and maximum service-life, an automatic air line lubricator
has been installed inline just before of the air motor.
• The lubricator should be adjusted to feed one drop of oil per minute.
• Lubrication is necessary for all internal moving parts and rust prevention.
• Excessive moisture in the air line can cause rust formation in motor and might also cause ice to form in the
muffler due to expansion of air through the motor.
• The moisture problem can be corrected by installing an additional moisture separator inline.
VANE REPLACEMENT: (Consult factory prior to replacing vanes.)
To replace vanes or inspect the pump interior:
1. Remove only the endplate by removing the six bolts holding the end plate to the body.
2. Remove the endplate and the four vanes, pay attention to the direction the vanes are facing.
3. Do not remove the rotor or loosen any electric motor “through-bolts.”
4. Inspect used vanes for signs of cracking due to backpressure.
5. Inspect interior surface of chamber and rotor, for any signs of scaring or metal to metal contact.
6. Ensure surface is smooth and free of rust or contaminants, sand down surface if needed.
7. Clean with appropriate flushing solution.
8. If necessary align body to set proper clearance.
9. Insert the vanes with the beveled edge fitting the contour of the body bore of the pump.
10. The rotor should be turned while setting clearance to assure that all points on the rotor clear the body.
11. Replace the endplate and endplate bolts securely. (Do not over-tighten).
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