Ingersoll-Rand 2475N7.5-P Owner's Manual page 12

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POSSIBLE CAUSE
Clogged or dirty inlet and/or discharge line filter.
Loose beltwheel or motor pulley, excessive end play in motor
shaft or loose drive belts.
Inadequate ventilation around beltwheel.
Lubricant viscosity too low.
Air leaks in air discharge piping.
Lubricant viscosity too high.
Lubricant level too high.
Lubricant level too low.
Detergent type lubricant being used.
Extremely light duty cycles.
Compressor located in damp or humid location.
Pressure switch differential too narrow.
Improper line voltage.
Wiring or electric service panel too small.
Poor contact on motor terminals or starter connections.
Improper starter overload heaters.
Poor power regulation (unbalanced line).
Drive belts too tight or misaligned.
Compressor valves leaky, broken, carbonized or loose.
Automatic drain valve clogged, leaking or defective.
Carbon build-up on top of piston(s).
Piston rings damaged or worn (broken, rough or scratched).
Excessive end gap or side clearance.
Piston rings not seated, are stuck in grooves or end gaps not
staggered.
Cylinder(s) or piston(s) scratched, worn or scored.
Connecting rod, piston pin or crankpin bearings worn or scored.
Loose bearing spacer on crankshaft.
Defective ball bearings on crankshaft or motor shaft.
Wrong beltwheel direction of rotation.
Leaking, broken or worn inlet unloader parts.
Auxiliary valve dirty or seats worn.
Crankshaft seal worn or crankshaft scored.
Leaking or maladjusted centrifugal pilot valve.
Leaking check valve or check valve seat blown out.
Extremely dusty atmosphere.
Defective safety/relief valve.
High pressure inlet valve leaking.
Low pressure discharge valve leaking.
Automatic start and stop mode is not suitable for air demand.
Pressure switch unloader leaks or does not work.
Ambient temperature too low.
Worn cylinder finish.
Beltwheel out of balance, tubes not braced or secured, wrong
pulley speed.
Engine not grounded properly.
Gasoline exceeds storage time or contains water.
No fuel in tank.
Fuel valve closed.
Low oil pressure.
Excessive condensate in receiver tank.
Loose fittings/elbows/connectors
Maladjusted or defective oil pressure regulator valve
Maladjusted or defective hydraulic unloader valve
Defective oil pressure gauge
Oil foaming in crankcase
Debris or other obstruction blocking oil flow
POSSIBLE SOLUTION
Clean or replace.
Check beltwheel, motor pulley, crankshaft, drive belt tension and
alignment. Repair or replace as required.
Relocate compressor for better air flow.
Drain existing lubricant and refill with proper lubricant.
Check tubing and connections. Tighten joints or replace as
required.
Drain existing lubricant and refill with proper lubricant.
Drain excess lubricant.
Add lubricant to crankcase to proper level.
Drain existing lubricant and refill with proper lubricant.
Run compressor for longer duty cycles.
Relocate compressor or install crankcase heater kit.
Adjust pressure switch to increase differential, if differential
adjustment is provided. Install pressure switch with differential
adjustment feature if differential adjustment is desired.
Check line voltage and upgrade lines as required. Contact
electrician.
Intall properly sized wire or service box. Contact electrician.
Ensure good contact on motor terminals or starter connections.
Install proper starter overload heaters. Contact electrician.
Contact power company.
Adjust belts to proper tension and alignment.
Inspect valves. Clean or replace as required. Install Valve/Gasket
Step Saver Kit..
Inspect valve and clean, repair or replace as required.
Clean piston(s). Repair or replace as required.
Install Ring/Gasket Step Saver Kit.
Adjust piston rings.
Repair or replace as required.
Inspect all. Repair or replace as required. Install
Bearing/Connecting Rod Step Saver Kit.
Inspect bearings and replace if required. Install
Bearing/Connecting Rod Step Saver Kit.
Check motor wiring for proper connections. Reverse two leads on
three-phase motors.
Inspect parts and replace as required.
Inspect parts. Clean, adjust or replace as required.
Replace seal. Install shaft sleeve if required. Install
Bearing/Connecting Rod Step Saver Kit.
Replace pilot valve o-ring. Adjust pilot valve.
Replace check valve.
Install remote air inlet piping and route to source of cleaner air.
Install more effective filtration.
Replace.
Inspect, clean or repair as required.
Inspect, clean or repair as required.
Adjust auxiliary valve for constant speed operation.
Realign stem or replace.
Install crankcase heater kit. Convert to All Season T30 Select
lubricant. Relocate compressor to warmer environment.
Deglaze cylinder with 180 grit flex-hone.
Check vibration level, change pulley or beltwheel if required,
tighten tube clamps.
Ground battery to engine as recommended.
Replace gas, add fuel stabilizer.
See manufacturer's instructions for refueling.
Open fuel valve.
See manufacturer's instructions.
Drain receiver tank with manual drain valve or install automatic
drain valve.
Re-torque fittings per specified torque requirements
Adjust valve to proper setting
Replace regulator valve
Replace hydraulic unloader valve assembly
Replace gauge
Drain existing lubricant, thoroughly clean crankcase, replace
lubricant
inspect/clean all oil passages