Harbor Freight Tools 66399 Troubleshooting, Problem Possible Causes Likely Solutions

Note: Turn the Compressor upside		inflator nozzle bag, and slide Fuse
down to allow the oil to penetrate		holder back into slot. Fasten back
onto the piston rings.		into place with screws.
c. Slide the Front Cover back on and	8.	When the tool needs servicing, it
secure in place with the four screws.
		should only be serviced by a qualified
6. If the Fuse (26) needs to be replaced,		technician.
snap off Fuse cover and then remove
and replace Fuse.

7. Slide out Fuse holder, replace old Fuse with new Fuse included in the

Troubleshooting

Problem		Possible Causes		Likely Solutions
Decreased output.	1. Not enough air pressure and/		1.	Check for loose connections.
		or air flow.
	2.	Blocked air inlet Filter (3).	2.	Clean air inlet screen of buildup.
	3.	Air leaking from loose housing	3.	Make sure housing and connections are
		or connections.		properly assembled and tight.
	4.	Mechanism contaminated.	4.	Have qualified technician clean and where
				possible, lubricate mechanism.
Severe air	1. Cross-threaded housing		1.	Check for incorrect alignment and uneven
leakage.		components.		gaps. If cross-threaded, disassemble and
(Slight air leakage				replace damaged parts before use.
is normal,	2. Loose housing.		2.	Tighten housing assembly. If housing cannot
especially on older				be tightened properly, internal parts may be
tools.)				misaligned.
	3.	Damaged valve or housing.	3.	Replace damaged components.
	4.	Dirty, worn or damaged valve.	4.	Clean or replace valve assembly.
No output	1. Poor clamp connection.		1.	Clean clamps and reconnect properly.
	2.	Power Switch in Off (O)	2.	Turn Power Switch to On (I) position.
		position.
	3.	Run-down battery.	3.	Recharge battery.
	4.	Blown Fuse.	4.	Replace Fuse.

Follow all safety precautions whenever diagnosing or servicing the tool. Disconnect from inflated item before service.

REV 10d

SKU 66399 For technical questions, please call 1-800-444-3353. Page 9