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Trouble
Low power or low free speed
Rough operation
Scoring of End Plates and
Cylinder
SAVE THESE INSTRUCTIONS. DO NOT DESTROY.
MAINTENANCE SECTION
TROUBLESHOOTING GUIDE
Probable Cause
Dirty Air Strainer Screen and/or
Muffler
Worn or broken Vanes
Worn or broken Cylinder
Improper lubrication or dirt
build–up in the motor
Worn or broken Shaft Bearing or
Rotor Bearing Seal Assembly
Worn Rotor Key
Improper assembly
Rotor Bearing Seal Assembly
misalignment
19
Solution
Using a clean, suitable, cleaning solution in a well–
ventilated area, clean the Air Strainer Screen
and/or Muffler. Allow to air dry.
Replace complete set of Vanes.
Examine Cylinder and replace it if it is worn or bro-
ken or if bore is scored or wavy.
Lubricate the Pump as instructed in
LUBRICATION. If lubrication does not result in
satisfactory operation, disassemble the Pump,
inspect and clean all parts.
Examine each bearing. Replace if worn or
damaged. Replace the Rotor Bearing Seal if the
outside diameter of the hub is worn to 1.76" or
smaller and/or the large inside diameter is worn to
0.910" or larger.
Replace the Key. Check the Rotor Shaft and Rotor
for keyslot wear and replace if necessary.
Make certain that all motor parts are properly
aligned prior to clamping the motor assembly.
Remove the Backhead. Rotate the motor by hand to
align the Seal.
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