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)
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.
My Compressor takes about 15 mins to fill to 115 psi.
(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, 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.