Harbor Freight Tools 67708 Page, For technical questions, please call, Problem, Possible Causes

Problem		Possible Causes		Likely Solutions
Overheating	1.	Filters need cleaning/replacing.	1.	Check inlet and outlet filters. Clean and/or replace as needed.
	2.	Crankcase oil too thin or	2.	Drain oil and refill to proper level with recommended oil.
		incorrect type.
	3.	Crankcase oil level too low.	3.	Add oil to proper level, check for leaks.

4.Unusually dusty environment. 4. Clean and/or replace filters more often or move unit to cleaner environment.

	5.	Cord is too small of a gauge or	5.	Increase cord size or use shorter length extension cord, or
		too long to handle compressor.		eliminate extension cord. See Recommended Wire Gauge for
				Extension Cords in Safety section.
	6.	Unit not on level surface.	6.	Reposition unit on a level surface.
Compressor	1.	Compressor not large enough	1.	Check if accessory SCFM is met by Compressor. If
starts and stops		for job.		Compressor doesn’t reach accessory SCFM, you need a larger
excessively				Compressor.
	2.	Loose fittings.	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	1.	Drain oil and refill to proper level with recommended oil.
		or oil is incorrect thickness or
		type.
	2.	Crankcase oil level too low.	2.	Add oil to proper level, check for leaks.
	3.	Loose or damaged belt guard.	3.	Replace belt guard.
	4.	Loose fittings.	4.	Reduce air pressure, then check all fittings with a soap solution
				for air leaks and tighten as needed. Do not overtighten.
	5.	Unit not on level surface.	5.	Reposition unit on a level surface.
Moisture in	Too much moisture in air.		Install inline air filter/dryer, and/or relocate to less humid
discharge air			environment.
Oil in discharge air	1.	Crankcase oil too thin or	1.	Drain oil and refill to proper level with recommended oil.
		crankcase overfilled with oil.
	2.	Crankcase vents clogged.	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	Loose fittings.		Reduce air pressure, then check all fittings with a soap solution for
or fittings			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.

Page 16 For technical questions, please call 1-800-444-3353. SKU 67708