plrodarte

Thanks for the information, you nailed it right on the head, it was an easy fix, the clutch brake was setting on the inspection cover when we pulled it off. I'm assuming, being a rookie, I engaged the brake while driving. Live and learn, thanks for the help its greatly apreciated.

you should be able to see what is left of your clutch brake when you take down the inspection cover at the bottom of the bellhousing. If there is still brake material left on the brake disk, all you have to do is adjust the clutch fork so that it travels farther. Usually on Macks you adjust the fork at the top of the bellcrank that the clutch cable connects to on the side of the transmission. Once you've got it adjusted so that you can feel the brake engage when the pedal is about an inch off the floor, all you have to do is make sure you have freeplay in the clutch pedal. If you don't have enough, you adjust freeplay on the clutch pressure plate. If your clutch brake is completely wiped out you can replace it without pulling the transmission. You will have to carefully cut off the old one (I've done it with a torch, but it's not a lot of fun!) and you can replace it with a two piece clutch brake that wraps around the pilot shaft and pins together.

I need to adjust or install a new clutch brake on my 94 I just bought 3 months ago, can anyone give me the run down on how this is done, or what to look for or an idea what I should pay a shop to do the work. Thanks

It has 450,000 miles, it was originally a lowboy truck. I called Mack, here in Seattle they said "Great engine, however an inframe rebuild is at least 20 thousand, I could swap the e-9 to an E7-400 for around 15000.00. The last E-9 was produced in 1998, and parts are hard to find. Most people with E-9's rebuild evrything, such as the turbo, injection pump etc,however the inframe parts they can get no problem."

In my area the comparable rig is around 12 grand higher, so I'm thinking "Take the savings I get today and know someday my rebuild will equal that"

I found a 1994 Mack CL713 E-9 T2180B, very nice truck, new tires wheels, new brakes, drop axle, highlift gate, The truck literally looks like new, problem, I know nothing about mack engines.