Top of my air compressore on my c15 acert leaking by

is it leaking from a little plate with two screws holding it down?

 

that is your compressor unloader valve you need a new one or you can take out and try cleaning and re install to get you by maybe lube o rings with little lite grease what model is your comp? if it's same as mine i got part number at shop but won't get it to you till tomorrow night

 

If it is leaking from the little plate with the screws in it then that is the unloader valve. More than likely you have a broken o-ring in it and/or the unloader is coked up (burnt oil residue). Both are common problems on the ACERT motors.

 

Yep, you need an unloader kit. I just bought one for a 2006 Acert C15 just a week ago from KW in Dallas for about $100. I was surprised it cost that much, but that KW for you...

Very easy to install. You can try cleaning your old one, but often times the o-ring breaks apart and the spring is often times worn out.

 

I'm sure about bad unloader valve, but identify your compressor first!

Is it Wabco, Knott, Bendix, Holset???? Parts differ and prices too!!!

 

Why on a bendix air comp on c15 this big line on top of comp keeps blow that line and fitting out which pulls threads out of head

 

There was a bulletin that addressed this issue....got rid of the steel line and replaced with a stainless/Teflon hose. See your local CAT dealer for parts.