Central Pneumatic
       Model 94667 Air Compressors



The Central Pneumatic model 94667 air compressor has a 21 gallon vertical tank. The maximum air pressure for this compressor is 115 PSI, adequate for running many air tools, except high demand ones.

With a reputed 3 HP motor, this pump should be able to output 10-12 CFM at 90 PSI. It cannot. You cannot run a 3 HP motor adequately when it is powered by a 120 VAC circuit, as the 94667 is.

The specifications say that it will generate about 4.9 CFM at 90 PSI configured as it is out of the box.

Central Pnematic 94667 air compressor

I suspect the actual output will be lower than that, so be careful if selecting this or a similarly sized air compressor to try and run higher demand air tools like wrenches, grinders, sand blasters and so on. They just will not work properly - or run for very long - with the relatively low output of the Central Pneumatic 94667.

There appears to be lots of interest in the model 94667 so I have created it's own forum on this page.

Fixing a 94667

A visitor by the name of Cal Covington offered the following information about his Central Pneumatic #94667 air compressor. "Looking for replacement parts for my Harbor Freight #94667 (discontinued), I found Valve Plate Kit HL026100AV normally used on a Campbell Hausfeld HL4000. This kit contains not only valve plate, reed valve and pins, but also a complete head gasket set. The cylinder head for the HL4000, Part # HL022600AV, is a great replacement for the cylinder also. Hope this helps."

Another anonymous visitor offers this advice: "Found the gaskets for the 94667 Campbell Hausfeld and Husky model HL4000 are exactly the same as the #94667. Whoever makes the compressor obviously sells them to several retailers. You can buy the head rebuild kit HL026100AV for less than $25 on ebay or lots of other web sites. It includes all gaskets, reed valves, and the head plate. And I'm guessing other HL4000 parts will fit on the #94667, too. I know this works, just did my #94667 and now it pumps right up and shuts off."

Thanks for that, folks.

Make Gaskets for the Central Pneumatic #94667

Recognize first of all that a compressor pump head gets very, very hot in operation. Yes, you can burn skin with the heat generated, so any gasket material has to be heat resistant.

Another visitor writes that they acquired gasketing material. They disassembled the pump and located all the gaskets that were present. They then either removed them to use as a template to make new ones, or used the surface where the original gaskets were installed as a template for the new one if the old gasket was beyond removal in one piece. They marked the new gasket material appropriately, and cut the material to suit.

Central Pneumatic #94667 air compressor manual

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

Central Pneumatic Model 94667 Manual

Please use the form below to post your own question about the 94667 air compressor from Central Pneumatic (Harbor Freight) after you have reviewed the existing advice and looked at the troubleshooting section which contains solutions to many common air compressor problems. Duplicate questions cannot be posted again.

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

Thanks,

Bill



Central Pneumatic Model 94667 Compressor Issues

Having an issue with your Central Pneumatic Model 94667 air compressor?

Here are other visitor's issues with Central Pneumatic Model 94667 Air Compressors

Please see below. You may find a solution to your problem already posted.

94667 air loss 
Compressor tank loses all air over night.

Need a new Power Switch assembly for 94667 
Unfortunately someone tried to help me but made one problem become 2 problems while trying to fix the air leak which appeared to be coming from the plumbing …

Two fixes for 94667 not attaining top pressure 
I have repaired my 94667 from not attaining top pressure with 2 different fixes. When my compressor continued to run while only attaining 60 psi, I …

94667 will not build above 40psi 
The compressor is an 2006 model # 94667, the compressor will not build above 40psi, i have taken off head and the piston appears to have good compression. …

94667 replacement parts if needed 
I have the same compressor i picked up for 45 bucks the other day and it needs a new top end(after i cracked the head and cylinder and bent the reed valve …

94667 15 amp reset button trips 
model 94667 air compressor; starts up sounds like its running great then after about 30 seconds shuts off and 15 amp reset button trips..then after roughly …

Add a tank 
I'd like to add a 25 gallon tank I picked up to this but I can't find any duty cycle information for it. I suspect that having it run longer and shutting …

Model 94667 - Motor failure 
My motor runs very sluggishly, than shuts off. The reset breaker does not trip. My uncle suspects the motor, but it could be the armature? …

Specific number of what to torque the head bolts of 94667  
Specific number of what to torque the head bolts to. I'm rebuilding the top end of my 94667 compressor.. I need specific numbers on head bolt torque.. …

94667 wont exceed 70 PSI and wont ever shut down 
Hi. My 94667 will only build, 70 psi, wont exceed that and wont ever shut down. It will build 70 psi, keeps running and wont shut down ever. Some people,say …

Head bolts torque 
Anybody know what the torque numbers are for the head bolts? Got a new kit, thank you all for that, and need to know what the torque specs are. Gary …

Central Pneumatic 94667 ran yesterday, won't start today. 
it's a Central Pneumatic 21, model #94667. I haven't used it for a year or more and needed to air up a tire. it turned on just fine, but only built …

94667 kicks overload after a few seconds 
my cp 94667 runs slow motor hums and kicks overload switch caps test ok. checked everything this site recommended.

94667 compressor will not compress 
My 94667 compressor will not build any air pressure. I did find the limit switch had popped out, reset that, now the electric motor/fan will turn, …

94667 switch valve leaks ? 
Im having a problem with the plumbing below the on off switch im not sure what you you call that square piece below the switch but it has a featherlike …

Compressor Starts ONLY if I hold in valve on cylinder head 
My CP compressor is brand new. Once the prep steps were completed it started and filled the tank fine. I ran the tank down a ways and tried a manual …

Model 94667 Has No Sustained Air Pressure 
When using pneumatic tools such as an impact gun or just a simple air nozzle the air pressure runs way down before the compressor turn back on. I believe …

Compressor completely drains from the switch box 
I had my compressor run from nearly no pressure in the tank and I noticed that after the tank was full and motor stopped, there was a heavy leak that was …

reset button on motor throws and turns motor off. 
Strange thing is can run motor contiously as long as it wants and no heat issue or throuwing of motor breaker. Only when the unit has built maz pressure …

Compressor only "clicks" when turned on 
compressor only "clicks" when turned on,do I need a pressure swtch? _________________ Don't know for sure, John. Empty the tank, start the compressor, …

Central Pneumatic air compressor model 94667 refuses to build air pressure ... 
I bought this compressor from Horbor Freight in 2011 and got about 2hours of work in 2 years. The compressor just failed yesterday: it refuse to build …

My 94667 air compressor leaks oil ... 
the unit seems to work fine but the compressor leaks oil and leave oil all over the floor and of course the oil needs to be topped up regularly. Event …

Model 94667 tries to start but will not run 
My air compressor will try to turn over but will not start. I took it to my shop and drained the water from the drain valve, set it upright and it ran …

My air compressor is very sluggish  
my air compressor Is slow and sluggish and wont stay on _________________ Is yours the 94667, John? Tell me, as a comment here, about how you are …

Click here to write your own.

Will not fill past 40 lbs. Just runs and runs........ 
same as above . compressor will not fill past 40 lbs. Just runs and runs...... Model 94667 _________________ See the troubleshooting pages, the one about …

UNLOADER VALVE ON THE Central PNEUMATIC AIR COMPRESSOR MODEL # 94667 
MY UNLOADER VALVE HAS A CRACK IN IT AND IT IS LEAKING AIR CAUSING THE AIR COMPRESSOR TO RUN MORE THAN IT SHOULD IT IS A SMALL CRACK. WHERE CAN I BUY A …

central Pneumatic air compressor model 94667 will only build to 85 PSI ... 
Compressor will only build up to 85 psi then shuts down and recycles. Where is pressure switch located? I don't see it listed in the manual! Could that …

will not start 
My Model 94667 will not start. It started real slow the last time I used it and this time it will not start at all. I pushed the circuit breaker button …

Flapper valve replacement for a Central Pneumatics model 94667 
apparently the valve has failed. Harbor freight says the Central Pneumatics upright air compressor Mod# 94667, is obsolete? My searches have been a BIG …

Central Pneumatic 94667 air compressors broke pressure switch and need a new one 
Where can I buy a pressure Switch for central pneumatic 94667 compressor or what switch will work on this compressor the switch is a fenwi FW-10 ______________ …

My central pneumatic 94667 air compressor will not stop running 
My compressor wont stop running and continues to build pressure until it pops its release valve. Wont restart until totally out of air. ___________________ …

Click here to write your own.