Central Pneumatic 67708, Set Up And Operating Instructions Manual

Page 16

For technical questions, please call 1-800-444-3353.

SKU 67708 

Problem

Possible causes

likely Solutions

Overheating

1.  Filters need cleaning/replacing.
2.  Crankcase oil too thin or 

incorrect type.

3.  Crankcase oil level too low.
4.  Unusually dusty environment. 

5.  Cord is too small of a gauge or 

too long to handle compressor. 

6.  Unit not on level surface.

1.  Check inlet and outlet filters.  Clean and/or replace as needed.
2.  Drain oil and refill to proper level with recommended oil. 

3.  Add oil to proper level, check for leaks.
4.  Clean and/or replace filters more often or move unit to cleaner 

environment.

5.  Increase cord size or use shorter length extension cord, or 

eliminate extension cord.  See Recommended Wire Gauge for 

Extension Cords in Safety section.

6.  Reposition unit on a level surface.

Compressor 

starts and stops 

excessively

1.  Compressor not large enough 

for job. 

2.  Loose fittings.

1.  Check if accessory SCFM is met by Compressor.  If 

Compressor doesn’t reach accessory SCFM, you need a larger 

Compressor.

2.  Reduce air pressure, then check all fittings with a soap solution 

for air leaks and tighten as needed.  Do not overtighten.

Excessive noise

1.  Crankcase overfilled with oil 

or oil is incorrect thickness or 

type.

2.  Crankcase oil level too low.
3.  Loose or damaged belt guard.
4.  Loose fittings. 

5.  Unit not on level surface.

1.  Drain oil and refill to proper level with recommended oil. 

2.  Add oil to proper level, check for leaks.
3.  Replace belt guard.
4.  Reduce air pressure, then check all fittings with a soap solution 

for air leaks and tighten as needed.  Do not overtighten.

5.  Reposition unit on a level surface.

Moisture in 

discharge air

Too much moisture in air.

Install inline air filter/dryer, and/or relocate to less humid 

environment.

Oil in discharge air

1.  Crankcase oil too thin or 

crankcase overfilled with oil.

2.  Crankcase vents clogged.

1.  Drain oil and refill to proper level with recommended oil. 

2.  Clean Crankcase vents.

Safety Valve “pops” Safety valve needs service.

Pull on test ring of safety valve.  If it still pops, replace.

Air leaks from pump 

or fittings

Loose fittings.

Reduce air pressure, then check all fittings with a soap solution for 

air leaks and tighten as needed.  Do not overtighten.

Air leaks from tank

Defective or rusted tank.

Have tank replaced by a qualified technician.

 Follow all safety precautions whenever diagnosing or servicing the 

compressor.  disconnect power supply before service.