Hook n ladder 1 Posted August 31, 2013 Share Posted August 31, 2013 My clutch brake stopped working a few days ago. There was a slight grown everytime I went to activate it. If it needs to be repaired or replaced does the clutch also have to be replaced or is it separate. Its a 98 CH with a10 speed eaton. Quote Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/ Share on other sites More sharing options...
MACKS Posted August 31, 2013 Share Posted August 31, 2013 They do make a two piece clutch brake,I never installed one thou,is you clutch adjusted right do you have an inch or two of free pedal. Quote Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-202893 Share on other sites More sharing options...
br549 Posted August 31, 2013 Share Posted August 31, 2013 If no other clutch problem, replace clutch brake with a 2 piece one old 1 can be cut out with a air chiesel or a cutting torch, not easy working in tight spot but we do it if there is no other clutch problem. They usually don last as long as a factory clutch brake but if it go bad again it can easily be replaced again. Quote Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-202897 Share on other sites More sharing options...
RowdyRebel Posted September 1, 2013 Share Posted September 1, 2013 Yup...don't take but 2 or 3 minutes to install a 2-piece clutch brake once the old one is out. Mine usually quits working when it breaks and falls out on its own... Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-202942 Share on other sites More sharing options...
Hook n ladder 1 Posted September 2, 2013 Author Share Posted September 2, 2013 Thanks men! Quote Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-203193 Share on other sites More sharing options...
Popular Post theakerstwo Posted September 2, 2013 Popular Post Share Posted September 2, 2013 Let me leave a couple of tips on making a clutch brake last till you clutch is replaced. The hardest thing on a clutch brake is the driver and I mean if you hold the clutch down against the brake any time the wheels are moving while in gear the clutch brake is acting as a brake to stop the the wheels from turning. I work with dump truckers ever day and in the shack were we are dispatched from many have ask me why does this cause a problem and most have never tought of it like that. Another thing is adjusting the gap between the brake and the throwout brg too narrow and the clutch is not completely disengaged and the clutch brake is expected to stop the disc and shaft from turning.When I was still working I and many other mechanics have changed clutchs with the clutch still good and clutch was worn out. So if your haveing the clutch brake disc go bad look at what is causeing it. It should if adjusted properly last till you need a clutch. Another tip some truckers want a two piece disc install when the cltch is installed so later the disc is clutch disc is easy to replace. That is a bad ideal cause the two piece disc does not have a over ride spring in it and it will not last as long as the proper clutch disc. 4 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-203203 Share on other sites More sharing options...
other dog Posted September 2, 2013 Share Posted September 2, 2013 The hardest thing on a clutch brake is the driver and I mean if you hold the clutch down against the brake any time the wheels are moving while in gear the clutch brake is acting as a brake to stop the the wheels from turning.that's exactly right Glenn, I'm not a mechanic, but I learned this when I first started driving. A lot of drivers don't seem to understand this, I see lots of drivers in fairly new trucks get in a truck that's idling go to put it in gear and just sit there and grind before finally just jamming it in gear because they've worn the clutch brake out. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-203213 Share on other sites More sharing options...
gearhead204 Posted September 2, 2013 Share Posted September 2, 2013 as glenn said two 1/4 in tangs on a input shaft cant hold 40,000 lbs my advice is if you run off road set clutch brake to grab @ 1/2 in. from very bottom of pedal travel. if on road 1 in. works fine. there are several styles to chose from one uses screws to hold together the two haves the other uses a rollpin. I would suggest the latter for a mack trans. due to the under slung cross shaft. Quote Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-203277 Share on other sites More sharing options...
j_martell Posted September 2, 2013 Share Posted September 2, 2013 I try to catch first or low (or something) before I stop to save my clutch brake....so far it's working.....30000kms and he mechanics haven't had to adjust it yet..... Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-203280 Share on other sites More sharing options...
Challenger Posted September 3, 2013 Share Posted September 3, 2013 Adjust the clutch. Quote Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-203497 Share on other sites More sharing options...
ForkliftJim67 Posted September 15, 2013 Share Posted September 15, 2013 (edited) I installed a new clutch brake and could not get pedal adjustments to specks, then discovered the clutch cable that was formerly installed was a replacement cable build wrong from the original, and they disposed of the original. Does anyone know/have the correct clutch cable for a 1983 Mack , model WS788LST, vin 1M2Y15C3DM001630, I could purchase? Even an old one or used one that I could have copied? Also need a drivers side windshield and cannot find one. Any suggestions? Edited September 15, 2013 by ForkliftJim Quote Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-206278 Share on other sites More sharing options...
theakerstwo Posted September 15, 2013 Share Posted September 15, 2013 Have you call the mack dealer? Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-206284 Share on other sites More sharing options...
thomastractorsvc Posted September 17, 2013 Share Posted September 17, 2013 Have you call the mack dealer?I agree Mack for the cable and LKQ (used)or a reputable glass shop can get the glass, safelight keeps them in stock, they are just a little pricy I thought Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-206703 Share on other sites More sharing options...
John Searcy Posted September 24, 2013 Share Posted September 24, 2013 I installed a new clutch brake and could not get pedal adjustments to specks, then discovered the clutch cable that was formerly installed was a replacement cable build wrong from the original, and they disposed of the original. Does anyone know/have the correct clutch cable for a 1983 Mack , model WS788LST, vin 1M2Y15C3DM001630, I could purchase? Even an old one or used one that I could have copied? Also need a drivers side windshield and cannot find one. Any suggestions?... I know who can get you exactly what you need. Call Mack One Call @ 800-866-1177 and ask for the phone number to the Mack Museum. They will be able to assist with locating any old parts. Quote Link to comment https://www.bigmacktrucks.com/topic/32559-clutch-brake/#findComment-208157 Share on other sites More sharing options...
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