madman1 Posted May 10, 2020 Share Posted May 10, 2020 I have a 2000 mack rd688s with 18 speed maxitorque tranny. This is the clutch brake out of it. Picture is the side thats on throw out bearing. Other side like new. What caused this? I just bought this truck. Quote Link to comment https://www.bigmacktrucks.com/topic/62476-clutch-brake/ Share on other sites More sharing options...
Popular Post HeavyGunner Posted May 10, 2020 Popular Post Share Posted May 10, 2020 Just a guess but I know drivers who don’t know what a clutch brake is or how it works can be hell on them. Especially when they use them to stop when rolling up to a stop sign. 2 1 Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/62476-clutch-brake/#findComment-450838 Share on other sites More sharing options...
fjh Posted May 10, 2020 Share Posted May 10, 2020 (edited) First thing is thing is the throw out bearing is not being greased from what I can see there! It is possible the clutch adjustment is out of whack the linkage needs to be set so as when the pedal Just reaches the floor the brake just contacts the face of the clutch! if it was set To deep and the previous driver was in the habit of pushing the clutch to the floor with the truck in gear and rolling it will wipe the brake out! wrong thing to do poor driving habits! Edited May 10, 2020 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/62476-clutch-brake/#findComment-450839 Share on other sites More sharing options...
fjh Posted May 10, 2020 Share Posted May 10, 2020 3 minutes ago, HeavyGunner said: Just a guess but I know drivers who don’t know what a clutch brake is or how it works can be hell on them. Especially when they use them to stop when rolling up to a stop sign. AGREE! Quote Link to comment https://www.bigmacktrucks.com/topic/62476-clutch-brake/#findComment-450840 Share on other sites More sharing options...
madman1 Posted May 10, 2020 Author Share Posted May 10, 2020 We replaced clutch brake and greased throw out bearing. Like you said, hasn't been greased in a long time. works good now. Just going keep an eye on it just make sure nothing else is going on. Thank you for the help. Quote Link to comment https://www.bigmacktrucks.com/topic/62476-clutch-brake/#findComment-450860 Share on other sites More sharing options...
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