Jump to content
Sign in to follow this  
RobertRichard

Mid-Liner air system help

Recommended Posts

Hi,

i am just a backyard mecanic but this truck is the frist one i see like this when the gouverner cut off , all the air produce by the compressor is blow off by the air dryer exaust not air from the tank just the exesse air produce by the compressor is it normal on a 99 midliner ???

thanks for your help

Share this post


Link to post
Share on other sites

This probably is normal

We had '86 & '87 CS300's with Knorr air compressors which are not equipped with unloading valves, they govern the pressure

in the brake system by having the excess air exit through the purge valve on the air dryer when the governor cuts out.

Ron

  • Like 1

Share this post


Link to post
Share on other sites

I also have a problem.... My wet tank has a lot of oil and sludge coming from it... In fact both wet and dry tanks having this issue.... Plus I can't go over 40 psi.... And no air is escaping anywhere 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

Welcome to BMT!

...The world's best antique, classic & modern Mack Truck support forum! Founded in 2000, BigMackTrucks.com is the place to go for everything related to Mack Trucks!

BMT!

BigMackTrucks.com is owned and operated by Watt's Truck Center, New Alexandria, PA. This forum and it's contents are not affiliated with Mack Trucks, Inc. or Volvo Trucks North America.

×