15
SYMPTOM: Pump Overheating
71° C – 90° C (160° F – 195° F) is normal output air temperature when the pump is continuously running.
This heat is dissipated as it travels through the respirator’s air supply hose until it reaches ambient air
temperature.
Make sure that both the inlet muffler and outlet filter are clean. Replace if necessary.
The pressure relief valve is set too high - reset to a lower pressure. Be sure the outlet pressure remains in the
proper range for the respirator as specified by the respirator manufacturer - see the respirator’s instruction
manual.
Flush the pump with Loctite ODC - Free Cleaner & Degreaser (P/N 22355) to remove excess dirt, sand,
particles, moisture or oil in the rotor assembly. See the Maintenance Section on page 11 of this manual for
proper directions on flushing the pump. When parts are reassembled, attach the respirator and turn the
pump on, monitoring its performance and overheating.
The electrical circuit to which the pump is connected is overloaded. Check the amperage load of the circuit
and disconnect other electrical equipment, if necessary, from the circuit.
SYMPTOM: Outlet Air Temperature Too Warm
Be sure that the air supply hose is laid out (not coiled) to permit excess heat to dissipate from the hose
Keep the air supply hose out of direct sunlight and off warm or hot surfaces.
Put a coiled section of the air supply hose in the bottom of a large container. Fill the container with water
and ice and cover with a lid. For best results, locate the container as close to the worker as possible.
SYMPTOM: Outlet Air Temperature Too Cold
Let the pump warm up approximately 15 minutes before using.
Coil the first 25-50 feet of air supply hose closest to the pump.
Keep the air supply hose off cold surfaces.
SYMPTOM: Moisture In Air Supply Hose Line
Locate the air inlet muffler in a dry, clean air location, where breathable air can be assured at all times.
With the air supply hose connected to the pump and a suitable quick-connect plug installed in the respirator
end of the supply hose (do not connect the respirator), turn the pump on and run for approximately 15
minutes to purge the hose of excessive moisture.
IF THESE STEPS FAIL TO RESOLVE THE PROBLEM, CONTACT YOUR DISTRIBUTOR, OR 3M CANADA’S
OCCUPATIONAL HEALTH AND ENVIRONMENTAL SAFETY HOTLINE at 1-800-267-4414.
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