Harbor Freight Compressors


The house brand for Harbor Freight air compressors is the Central Pneumatic air compressor. Please see the Central Pneumatic air compressor pages for details about that specific brand of air compressor.

This page on this website is intended to provide a forum for problems and fixes only for Harbor Freight Air Compressors.

If you are looking for parts for your Harbor Freight air compressors, here is the place to start:

Harbor Freight Compressor Parts

Harbor Freight Customer Service: 1-888-866-5797
Monday thru Friday, 5:00 am to 7:00 pm PST
Fax your concern to 1-800-905-5215 or 1-805-445-4912
Write to: Harbor Freight Customer Service
3491 Mission Oaks Blvd., Camarillo, CA 93011-5034
Email: parts@harborfreight.com

Harbor Freight Central Pneumatic air compressor

Below, you can download manuals that folks have provided to help with your Harbor Freight compressor. There is also a form for questions about Harbor Freight air compressors. Below the form are existing posts and responses.

Please post any questions or comments about your Harbor Freight air compressor below if you would - after you have read the troubleshooting tips on this site for solutions to problems common to many air compressors - and read the postings below that relate to your air compressor problem.

If you see a question on which you can offer advice, please do as a comment on that post. All of us can then benefit from your Harbor Freight air compressor experiences.

As the numbers of comments added to this page grows, it gets harder to find the specific answer you are seeking so I've added a search box here for your use to help you find the information you need.

News: I'm gathering the specific tips that folks have sent in about Harbor Freight / Central Pneumatic air compressors and am putting them all here in one place, by model number, if possible. Hope this helps.

Thanks,

Bill


Harbor Freight compressor manuals
Click the link to download a manual to your computer. Don't forget to save it to your computer so you have it for future use.

Harbor Freight (Central Pneumatic) Model 38898 manual
Manual for Harbor Freight (Central Pneumatic) Model 47065
Manual for Harbor Freight (Central Pneumatic) Model 67708
Harbor Freight (Central Pneumatic) Manual Model 68064
Harbor Freight (Central Pneumatic) Model 90234 Manual
Harbor Freight (Central Pneumatic) Model 94355 Manual


Harbor Freight Compressor Issues

Having an issue with your Harbor Freight air compressor?

Here are other visitor's issues with Harbor Freight Compressors

Please see below.

Pressure switch problem? 
compressor will not shut off when 150psi is reached. safety valve pops but compressor will not shut off. safety valve resets when 120psi is reached after …

Oil Doesn't Drain - Drain Port Plugged? 
I have a new central pneumatic 10 gallon 125 psi compressor. I filled it with oil, let it run 30 minutes to burn it in then tried to drain the oil by …

67501 8 gal 2 hp humming noise 
Fan will start keeps kicking the internal breaker on the head all I get is a humming noise

67696 had loud pop 
Harbor Freight model 67696 was working normally when there was a loud pop. The compressor continued to run but pressure did not increase. I took …

Harbor Freight air compressor hums 
I got a central pneumatic air compressor from Harbor Freight and everytime I try starting it just hums and the reset button keeps tripping off. Any tips? …

Compressor will not shut off 
I have a central pneumatic oil-less compressor(3gal oil-less) compressor that builds to 40PS but won't shut off also at what psi is it supposed to shut …

Remove cover on 67696 
Item number 67696. 6 gal. 150 psi. Belt is broken I am attempting to remove the top so I can get into the belt and the screws don't seem to have a …

Model 95275 stopped working. 
My Cental Pneumatic Air Compressor Model 95275 stopped working. My Air compressor model 95275 that I have owned for about two years and have used …

Need fan for central pneumatic 38898 compressor 
Cooling fan dissinagrated now compressor over heats

Harbor Freight 21 Gallon (red) Broke on Ring 
I have a HF 21 Gallon 3HP the older RED model. It blew a head gasket and in trying to repair it with gasket material from Auto Zone the Piston came out …

Pancake compressor blows the safety valve 
Model 68149, pancake, 150 PSI, compressor, 6 gal, 1.5 hp. Compressor won't shut off when it reaches 150 PSI, rather it blows the safety valve. What …

67708 won't start up 
Purchased model #67708 compressor. Other than airing tires, blowing out lawn mower filters, and tire rotation....it has been used once to drive roofing …

Hooking Up HFT's Compressor Drainer Kit (#68244) 
Good morning. I've got a HFT Compressor Drainer Kit (Model #68244). The instructions state: "Locate the pressure switch on the compressor. The line …

Need a wheel for compressor model 69667 
I need to replace a wheel for my compressor model 69667, where can I buy one?

Start valve and other parts for the 67847 
Need to replace the start valve (Part #:3, page 18,owners manual). Having a hard time locating. Harbor Freight customer service says to go to e-bay or …

Harbor Freight compressor pump install question 
I bought a Harbor Freight 67697 compressor to replace a unit on my Sanborn 60ga. The Harbor Freight does not have a small port for going to the pressure …

Won't restart when pressure falls 
Brand new 21 gallon 2.5 hp compressor. takes a few resets of the reset button but then works and gets to 125psi. However, it never restarts. I don't …

Oil fill plug blew apart 
Oil fill plug on Central Pneumatics 67708 blew completely apart. Looking for replacement of entire plastic portion that screws into compressor.

Reed valve failure. Need parts 
Central pneumatic 2.5 HP 21 gal compressor. Where can I purchase a new reed valve?

U.S. General Model US660V 
Head gasket for compressor failed, need replacement. Where can I purchase a replacement part?

Harbor Freight 90234 
I need a pressure switch for 90234 Harbor Freight air compressor. Where can I purchase one?

61454 oil drain location? 
Where is oil drain? Not found in instructions

61693 quit working on 3rd use 
I purchased a Harbor Freight 21 Gal 2.5 hp compressor (item# 61693) at one of the stores sales. It was purchased for $110, but the cashier rang it up …

Complaint - 21 1/2 Gal, 2.5 HP 
I hope this helps Harbor Freight with this and other compressors such as mine. I bought this compressor from Harbor Freight (21 1/2 Gal. 2.5 HP) after …

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Where to buy parts CP # 95275 compressor 
Where can buy parts for CP 95275 compressor?

oil come out of fill cap when compressor kicks on 
2.5 hp 21 gallon 125 psi. Had this compressor for a few years with no trouble now it is shooting oil out of the fill cap when the compressor starts. The …

Harbor Freight 22 gal blows the internal breaker 
this is a Harbor Freight 22 gal 110 v. blows the internal breaker not the house breaker

Building your own compressor 
I have a new tank and regulators etc. I am thinking about building my own twin cylinder compressor. Do you have any experience or knowledge about the compressors …

125 PSI Harbor Freight compressor pops overload 
2-1/2 hp gallon air compressor used for 1/2 hour out of the box. Put the oil in as required. Not abused at all. Now the compressor pops the overload …

model 3048 us660v builds to 70 psi keeps running  
builds to 70 psi keeps running but stops building pressure-60 gal model 3048 us660v

harbor freight air compressor 4 hp 10 gal 90234 leaking air 
When I plug in my harbor freight air compressor which is a harbor freight air compressor 4 hp 10 gal model number 90234 it is leaking a huge amount of …

90234 compressor won't run 
I have a 4 hp - 10 gallon model 90234 compressor that worked properly until it accidentally tipped back to the vertical position. After that, it won't …

harbor freight 21 gallon compressor runs constantly 
I have a harbor freight 21 gallon compressor and I accidentally popped of the pressure switch. I thought I got it back together correctly but now the …

New H/F compressor model 67847 wont stop running 
New H/F compressor(67847)wont stop running, Gets to about 90psi, stays running I got a HF air compressor the other day, the 67847 model, 2.5 HP, 21 …

New HF compressor model 3848 will not turn on ... 
I have the comprssor wired up. both leads coming in have power at the pressure switch. when power switch is turned on, the leads at the motor also have …

Harbor Freight compressor runs fine but will not build pressure ... 
I used it pm, it is like new few hours use, I left it plugged in turned off valve, next am heard it running, opened garage noticed oil on floor, unplugged …

Oil spilling out of Harbor Freight air compressor ... 
The plastic combo oil filler/dipstick with crankcase breather on my little 2.5 gallon Harbor Freight compressor was cracked and falling apart. I put …

Harbor Freight compressor will not inflate a bike tire 
Have a 90 psi Harbor Freight compressor. Pressure guage reads 90 psi when it shuts off, but still can barely inflate bike tire to 45 psi. Tried on car …

Harbor Freight compressor regulator is not regulating ... 
Have a cheap H/F compressor rated for 4.5 SCFM @ 90psi, tool is rated 4 SCFM @ 90psi. With the reg set at 90 and tank pressure reading 120, when I …

2.5 HP Harbor Freight air compressor problem 
compressor shuts off without reaching full operating pressure (circuit breaker trips) ________________________________ Jon: Make sure the power …

21 gal compressor trips breaker 
Just picked up an "as is" 21 gal compressor, was hoping all issues with it were resolved, it starts up just fine and refills but when it stops it trips …

NPA = NO Parts Available HF Air Compressor Model 99781 
I wasted 1 hour on phone waiting for the Harbor Freight Service and Support representative to pick up. (5 callers ahead of me) Agent Eric was pleasant …

Small Harbor Freight compressor stopped pumping pressure into tanks  
Small two tank Harbor Freight compressor used to air up tires occasionally stopped pumping pressure into tanks Approximately 1 1/2 years old handle …

Air line kinked and pulled the red oil dip stick out broke it 
The coiled air line I was using kinked and pulled the red oil dip stick out and fliped it and broke the measuring stick part of the plug....Harbor freight …

Chicago compressor bought from harbor freight - will not make air 
I have a Chicago compressor bought from harbor Frieght. The compressor runs but don't make air . Why The runs find it looks like the person I bought …

I fixed Model 94667 Harbor Freight compressor would not build pressure ... 
My new HF 2Hp 8 Gal. 125 PSI Air compressor is shooting out oil from the oil plug vent hole (2 tiny holes on the bottom of plug, 1 on top). It is definatly …

leaking air at I believe unloader valve 
I believe air is leaking at the unloader valve, how do I fix this? ________________ Ron, see the page on Check Valves for guidance. If your check …

Harbor Freight air compressor will not do anything ... 
i have a 21gal 3hp compressor . it wont do anything i wired around circuit breaker fan turns starting cap is not damaged or leaking. ________________________ …

Harbor Freight air compressor shuts off before filling ... 
copressor shuts off before filling. _________________ Bill says... Note at what pressure the compressor shuts off. Drain the tank, start it again, …

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Harbor Freight compressor thermal switch keeps popping out ... 
i have the 90234 air compressor from harbor freight. i have used it quite often for over a year. i have even pushed it multiple occasions running it …

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