Troubleshooting - Gardner Denver GD 70 Parts List, Operating & Service Manual

EN
PROBLEM
Abnormal piston, ring or cylinder wear.
Air delivery drops off
Unit does not come up to speed
Unit is slow to come up to speed
Unit runs excessively hot
Excessive noise during operation
HYD-7-610

TROUBLESHOOTING

POSSIBLE CAUSE
Lubricant viscosity too low
Lubricant level too low
Detergent type lubricant being used
Cylinder(s) or piston(s) scratched worn or
scored.
Extremely dusty atmosphere.
Worn cylinder finish
Clogged or dirty inlet and / or discharge line
filter
Air leaks in air discharge piping.
Lubricant viscosity too high.
Compressor valves leaky, broken, carbonized
or loose.
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.
Defective safety/relief valve.
Lubricant viscosity too high
Compressor valves leaky, broken, carbonized
or loose.
Defective ball bearings on crankshaft or
motor shaft.
Lubricant viscosity too high
Leaking check valve or check valve seat
blown out.
Ambient temperature too low.
Inadequate ventilation.
Compressor valves leaky, broken, carbonized
or loose
Wrong beltwheel direction of rotation
Lubricant viscosity too high
Lubricant level too low
Compressor valves leaky, broken, carbonized
or loose.
Carbon build-up on top of piston(s).
Defective ball bearings on crankshaft or
motor shaft.
Leaking check valve or check valve seat
blown out.
POSSIBLE SOLUTION
Drain existing lubricant and refill with proper
lubricant.
Add lubricant to crankcase to proper level.
Drain existing lubricant and refill with proper
lubricant
Repair or replace as required
Install remote air inlet piping and route to
source of cleaner air. Install more effective
filtration.
Deglaze cylinder with 180 grit flex-hone.
Clean or replace
Check tubing and connections.
Drain existing lubricant and refill with proper
lubricant.
Inspect valves. Clean or replace as required.
Install valve kit.
Install ring kit.
Adjust piston rings
Repair or replace as required
Replace
Drain existing lubricant and refill with proper
lubricant.
Inspect valves. Clean or replace as required.
Install valve kit.
Inspect bearings and replace crankshaft
assembly if required.
Drain existing lubricant and refill with proper
lubricant.
Replace check valve.
Relocate unit to warmer environment. Install
crankcase heater kit.
Relocate unit for better air flow
Inspect valves. Clean or replace as required.
Install valve kit.
Check motor wiring for proper connections.
Reverse two leads on three-phase motors.
Drain existing lubricant and refill with proper
lubricant
Add lubricant to crankcase to proper level
Inspect valves. Clean or replace as required.
Install valve kit
Clean piston(s). Repair or replace as required.
Inspect bearings and replace crankshaft
assembly if required
Replace check valve.
EN-11