Rolair 13GR30HK30 Manuel D'utilisation page 11

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WARNING
Make sure you completely understand all of the safety warnings and operation of each system control
component before attempting any maintenance or repair. Always drain the tank pressure completely, make sure the
power cord is unplugged, and unit has time to cool before performing any maintenance or service operations.
PROBLEM
Low discharge pressure
Knocking
Overheating
Excessive starting/stopping
Excessive belt wear
Oil in discharge air or
oil blowing out of
crankcase vent
Water in crankcase
(Oil appears milky in color)
Motor/compressor fails
to attain speed
NOTE: Reciprocating compressors consume a certain amount of oil under normal operation. If you are concerned
about your oil consumption, monitor and record oil consumption daily before consulting your dealer. When oil
consumption is normal and what appears to be milky oil is found in your lines, this is caused by small particles of oil,
along with water vapor, condensing in your air lines. To eliminate this problem: Air-Cooled Aftercoolers, Refrigerated
Dryers and Filters are available through your dealer.
CAUSE
Air leaks
Restricted air intake
Loose/slipping belt(s)
Compressor too small
Blown gasket
Broken valves/worn rings
Loose pulley/flywheel
Loose belt(s)
Lack of oil in crankcase
Internal pump problem
Poor ventilation
Dirty cooling surfaces
Incorrect flywheel rotation
Blown gasket(s)
Broken valves
Excessive air leaks
Unit too small for application
Air storage capacity too small
Motor pulley or flywheel out of alignment
Flywheel/pulley wobble
Improper belt tension
Wrong oil viscosity
Improper flywheel rotation
Crankcase overfilled
Obstructed crankcase breather
Inadequate ventilation
Restricted air intake
Worn piston rings
Infrequent cycling
Incorrect or inferior oil
Loose belts
Low voltage
Improper wiring
Defective check valve
Motor overload
Inoperable relief valve
SOLUTION
Correct air leaks
Clean or replace intake element
Adjust belt tension
Perform pump-up time test
Replace head gaskets
Replace valve/rings
Tighten appropriate item
Adjust belt tension
Add oil
Take pump in for service
Relocate air compressor
Clean compressor
Contact an electrician
Replace head gaskets
Replace valve/head gaskets
Correct air leaks
Add/replace air compressor
Add reserve air tank
Reposition pulley or flywheel
Replace appropriate item
Adjust belt tension
Use correct type of oil
Contact an electrician
Drain to proper oil level
Clean or replace breather
Relocate compressor
Clean or replace intake element
Take pump in for service
Install crankcase heater
Use correct type of oil
Correct belt tension
Contact an electrician
Contact an electrician or factory
Replace check valve
Push motor reset
Replace pressure switch
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