Central Pneumatic Model 94667 refuse to build up the pressure

by Roland Autran
(Fort Lee, NJ)

Central Pneumatic air compressor model 94667 (Photo: http://auction.repocast.com)

Central Pneumatic air compressor model 94667 (Photo: http://auction.repocast.com)

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 up the pressure higher than 20psi.

Looking at your site, I guess it must be one of the gasket but the compressor behavior is unusual.

When running air is coming out of the Air Filter instead of going in.

Do you have an idea if it is a gasket or may be the valve or piston?

Thank you for your help.
_______________________
Roland, if air is bleeding out the intake valve that means that the air intake valve is failing, and instead of blocking the air from getting out when the compressor piston is in the compression stroke, rather than the air going into the tank, it blows right back out of the intake.

You need a valve kit, and if you do that, I suspect you'll want to replace the gaskets too.

Cheers,

Bill

Comments for Central Pneumatic Model 94667 refuse to build up the pressure

Click here to add your own comments

Nov 04, 2015
94667 Parts
by: Bill

John, another visitor says that head rebuild kit HL026100AV has the valves and gaskets for the 94667.

If you Google "head rebuild kit HL026100AV" you'll find sources.

Nov 03, 2015
gasket
by: john M

I took the top apart and found the gasket is broken. Where do I find proper parts to buy for this Model 94667 . I have a parts list its the 3B gasket on top and 5B gasket underneath. I dont know where to get the parts.

Click here to add your own comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Central Pneumatic Model 94667 Compressor Issues.

My Compressor takes about 15 mins to fill to 115 psi.

by Tony
(El Paso, TX, USA)

My compressor has always taken a long time to fill up with air. Is this normal. I had to replace the valve plate gaskets recently as it would not go past 40 psi.
This site helped my decipher that issue. The compressor is actually a tad less noisy, but it takes a long time to fill with air. I have checked for leaks and have fixed the 2 I did find. What else can I check? I thought about checking the piston rings to see if they are phased correctly. Would this cause a slow fill??

Thank you in advance.

Tony
________________
Tony, assuming the valves are working properly, the motor is up to snuff, the tank check valve isn't crudded up to partially block flow into the tank, that the intake filter is clean, then I would suspect that you have a gasket leak inside the pump.

If so, that gasket may not leak until a threshold of pressure is reached, and then, if it lets go at that pressure, air recirculates inside the pump instead of being forced into the tank.

Cheers,

Bill

Comments for My Compressor takes about 15 mins to fill to 115 psi.

Click here to add your own comments

Jan 21, 2013
an improvement
by: Tony

Thanks for the insight. I had forvetten to mention that this is Central Pneumatic 94667. It has roughly 100 hours on it. It is very clean. I meazured the gasket that I removed against the gasket material I bought. To my surprise, the original gasket was .062 and the new gasket is .031. I made up the difference using silicone gasket maker/sealer on both sixes of each gasket on the valve plate. My compresspr now takes 6 mins exactly to fill up. Much better than 15 min. I was hoping for somewhere in the range of 3 1/2 mins as I have seen on the internet, but I'll gladly take this vast improvement.

Thanks for your help.
_________________
You are welcome, Tony. Sounds like you still have a gasket leak, though much less.

B.

Click here to add your own comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Central Pneumatic Model 94667 Compressor Issues.