Harbor Freight Tools Air Compressor 67708 - Manual (Page 16)

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.