Clutch Brake

[thomastractorsvc]

Can you use a torch on a 8 speed to cut the clutch brake out or is there a seal that will get damaged on the input shaft to the tranny?

I bought another truck and just about had to shut it off at alight to get it to go into gear.  Pictures to come still cleaning it up.  

[mrsmackpaul]

There is a oil seal in the input shaft or at least there should be 

 

Used to be able to get a 2 piece clutch brake so it could be changed with pulling the trans dunno if you still can 

 

Paul

[thomastractorsvc]

I haven't checked but I just seen a video that shows one.  I know on some transmissions the input seal is protected under a cap never seen one of these out of a truck  

 

[theakerstwo]

If its a mack trans it has a seal that you will burn.If its a eaton tghen there is no seal.

[thomastractorsvc]

I messed with it today and adjusted it seems to be okay for now.  I set it for 10 thousands at full pedal and it is just about a hair or less more than 1/2" when released.  On the clutch adjustment bolt it was way out and there was another threaded portion on the other side that he jammed an undersized both into.  I am not sure if there is anything that goes in the threaded portion on the top side so I called Mack to see and if so I will order the bolt.  I think I will need to adjust the linkage as there is not a lot of free play and it got dark. 

[Challenger]

Eaton/Meritor trans---Burn it out

Mack trans---Air hammer with a sharp chisel bit and go to town.  Good times

[thomastractorsvc]

I had to redo the AUX trans linkage and while I was under there I checked the measurements again, then drove it around a little and the clutch brake is working fine.  I have not adjusted the clutch it self as it seems to be working fine but does not release until the pedal is almost all the way up.  There is no free play would that be a cable adjustment or the actual clutch itself?  My service manual only goes to 1980 and the it looks like a different setup than what it shows in the manual. 

 

[felicello122]

I use an air chisel to remove them

[MACKTRUCKS4]

http://www.truckpartsandservice.com/clutch-brake-removal-tool/

[Challenger]

1--linkage adjustment

2--Clutch adjustment at/on the clutch- Normally if its an easy pedal it has the 5/8 bolt head.  Hold the clutch pedal down, push the 5/8 bolt head in and turn right  "tighten" the bolt.  This will add freeplay.  Turning the bolt left or "loosen" will take freeplay away.   Make sure the bolt springs back out or it will turn while the engine runs.   This is what you need to do to add freeplay.  

If its a Solo clutch, its self adjusting.  This style has the wear indicator.  Basically its says new and replace,  the indicator moves as it wears.  

I normally go from the inside clutch adjustment, then outside linkage adjustment.  Some people do the opposite.