Gardner Denver Reavell 5236, Operating & Maintenance Manual

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FAULT PROBABLE CAUSE RECOMMENDATION(S)
LOW FIRST STAGE
PRESSURE
Intake filter element dirty or blocked Remove, clean and renew element.
First stage suction/delivery valve
fault.
Remove and service valves.
Gas leakage from compressor
system. Renew parts, joints and seals as necessary.
Unloader/drain valves not closing. Check solenoid valves are operating
correctly and the drain valves seat properly.
Check that operating gas pipework is not
damaged or blocked at 1st stage separator
end. Renew diaphragms and valves if
necessary.
Pressure gauge restriction. Ensure pressure gauge snubber is not
blocked. Check calibration of pressure
gauge.
Vee belt drive slipping. Check and re-tension vee belts.
1ST STAGE SAFETY VALVE
BLOWING AND/OR HIGH
FIRST STAGE PRESSURE
Faulty safety valves. Replace safety valve.
'O' ring failure. Renew 'O' rings on 2nd stage valve cover.
2nd stage suction valves faulty. Service valves.
2ND STAGE SAFETY VALVE
BLOWING
Restriction in non-return valve,
pressure switch fault, pipeline
blockage. Existing Installation:
Check functioning and setting of all control
valves, clean pipeline filters and service
elements. Check operation of pressure
switch.
New Installations:
Ensure all protective plugs are removed from
ports and control valves are set correctly.
Ascertain pipework is of adequate
dimensions with minimum of bends, check
joint gaskets for correct positioning and size.
Check operation of pressure switch.
COMPRESSOR RUNS
LONGER TO ACHIEVE
SYSTEM PRESSURE
Check LOW FIRST STAGE
PRESSURE symptoms.
Piston ring wear. Check components, renew rings and liners
on 1st and 2nd stages as necessary. Check
blowby on crankcase breather pipe.
OVERHEATING
Incorrect grade of lubricant. Drain, clean and refill with correct lubricant.
Check condition of valves and air
passageways.
Insufficient water flow, reduced
cooling efficiency. Examine condition of water circuit, remove
sludge or scale.
OVERHEATING
– R
ADIATOR SETS
Water pump faulty or drive slipping.
Insufficient water flow. Renew pump, re-adjust drive, add inhibitor.
Incorrect siting. Resite to give correct cooling airflow.
Radiator blocked. Clean and blow out.
LOW OIL PRESSURE
Oil filter blocked Fit new oil filter element.
Worn bearings. Check bearing clearances.
Bearing end plate gasket distorted
partially blocking suction port. Examine gasket, replace if necessary.
Loose pipe couplings in crankcase. Trace and rectify.
Loose big end bearing bolts or
incorrectly fitted big end bearings. Examine and retighten to correct torque.
CUTS OUT ON START UP
Overload set too low. Consult competent electrician.
Insufficient electrical supply
causing low voltage. Consult competent electrician.