Rusty Bolts Posted February 21, 2015 Share Posted February 21, 2015 hey all, working on a 237 putting on a Jacobs compression release brake model 675. dose any one know the adjustment for the slave cylinder ? I normally take the adjuster down till it touches the washer then back off 3/4 turn, the trouble is brake dose not want to work at all, I have 12 volts at solenoids and they seem to be working and engine is warmed up to temp. just not sure on the adjuster never had this before. thanks, any thoughts. Quote Link to comment https://www.bigmacktrucks.com/topic/39016-jacobs-brake/ Share on other sites More sharing options...
theakerstwo Posted February 21, 2015 Share Posted February 21, 2015 I can not copy and paste any more on this forum.But you need to go to jacbos brake home page and look in the parts and service section.There will be the complete install manual there as well as a parts section.I could look it up but best you read it.Also have you installed the oil screw and o/ring in the rockers so oil can be transferred?And when its working don't expect too much from it. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/39016-jacobs-brake/#findComment-280024 Share on other sites More sharing options...
farmer52 Posted February 21, 2015 Share Posted February 21, 2015 Here you go...http://www.jacobsvehiclesystems.com/I posted the Troubleshooting Guide in the Wiki section. Hope this answers your questions. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/39016-jacobs-brake/#findComment-280029 Share on other sites More sharing options...
Rusty Bolts Posted February 23, 2015 Author Share Posted February 23, 2015 thanks for the input, I will give it a try, not sure on the oil screw I removed the brake from a motor then put it on the motor I am working on. I was told the brake worked but not sure now, so I have to start from the beginning. I will let you know the out come. thanks for the pdf file i will try it out Quote Link to comment https://www.bigmacktrucks.com/topic/39016-jacobs-brake/#findComment-280331 Share on other sites More sharing options...
theakerstwo Posted February 24, 2015 Share Posted February 24, 2015 You have to install the oil screw on each set of rockers so you did or you did not ? Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/39016-jacobs-brake/#findComment-280430 Share on other sites More sharing options...
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