Steve 97 Posted August 3, 2019 Share Posted August 3, 2019 Looking for some info on jake oil line DIY jakes stop working once the oil gets up to temp check all power and solenoids they working good Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/ Share on other sites More sharing options...
Mack Technician Posted August 3, 2019 Share Posted August 3, 2019 It loses oil pressure/flow to actuate jakes in lower RPM because of oil not making it to engine top with sufficient volume and pressure. What do you want to know about? Installation of kit? DIY? Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429249 Share on other sites More sharing options...
Steve 97 Posted August 3, 2019 Author Share Posted August 3, 2019 Ya just if there’s a way to make the oil lines up my self and if that will solve the problem I did oil pump and new crank bearings it has lots of oil psi 50psi + at 1500 rpm Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429251 Share on other sites More sharing options...
steeler Posted August 3, 2019 Share Posted August 3, 2019 We usually start with a rebuild kit and oil lines. Can you even get the rebuild kit anymore? I thought I heard they were no longer available, but I could be wrong there. Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429252 Share on other sites More sharing options...
Steve 97 Posted August 3, 2019 Author Share Posted August 3, 2019 Ya we have one kit here just wasn’t sure if adding the oil lines would solve the problem Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429253 Share on other sites More sharing options...
steeler Posted August 3, 2019 Share Posted August 3, 2019 8 minutes ago, Steve 97 said: Ya we have one kit here just wasn’t sure if adding the oil lines would solve the problem I don't think I've ever successfully fixed one with just the kit, but have fixed many with kit and lines. Do both. Make sure you have the new style oil feed screws, and remove the little ball and spring from the bottom. The kits usually had instructions in there. Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429255 Share on other sites More sharing options...
Mack Technician Posted August 3, 2019 Share Posted August 3, 2019 (edited) Crank bearings are = or < critical than camshaft bearings in capturing the oil drop-out. Line kits help, it’s not a waste of time. Update Jakes install externals (lines) w/flow check high volume oil pump p1 bearings on mains new cam bearings if all else fails. Edited August 3, 2019 by Mack Technician Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429256 Share on other sites More sharing options...
fjh Posted August 3, 2019 Share Posted August 3, 2019 1 hour ago, steeler said: I don't think I've ever successfully fixed one with just the kit, but have fixed many with kit and lines. Do both. Make sure you have the new style oil feed screws, and remove the little ball and spring from the bottom. The kits usually had instructions in there. Not sure they are fixable! you can maybe improve but fix not so much Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429267 Share on other sites More sharing options...
JoeH Posted August 3, 2019 Share Posted August 3, 2019 (edited) Does a mechanical 1995 e7-350 fall under the same guidelines? One head always works, the other head works 80% of the time. Usually cuts out after pulling hard. Typically works again after going easy on the motor for a bit. 19,000+ hours on the motor. Edited August 3, 2019 by JoeH Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429278 Share on other sites More sharing options...
Mack Technician Posted August 3, 2019 Share Posted August 3, 2019 Truth be told.......Until Powerleash came on the scene Mack had never had a really great engine brake. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429282 Share on other sites More sharing options...
Steve 97 Posted August 3, 2019 Author Share Posted August 3, 2019 Can a guy put the power leash on mine instead of trying to fix the jake Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429286 Share on other sites More sharing options...
DCR Posted August 3, 2019 Share Posted August 3, 2019 Had the same problem with my 2000 E7 460. Added additional oil line kit and not much improvement.next oil change added 2 gallons of Lucas and 100 percent improvement. Quote Denny330-550-6020A "Mack Pack" Charter Member Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429291 Share on other sites More sharing options...
Steve 97 Posted August 3, 2019 Author Share Posted August 3, 2019 Do you have a picture of where to get the supply for the oil lines Lucas isn’t really a option in our winters up here Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429294 Share on other sites More sharing options...
Mack Technician Posted August 3, 2019 Share Posted August 3, 2019 (edited) 2 hours ago, Steve 97 said: Can a guy put the power leash on mine instead of trying to fix the jake No, unfortunately. A reverse engineered ASET AI is the closest you’ll get to your engine with a great brake. Edited August 3, 2019 by Mack Technician Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429296 Share on other sites More sharing options...
KKERGALL Posted August 3, 2019 Share Posted August 3, 2019 Go to "Jacobs" website and check application, there was an update kit which provided additional oil pressure to brake. If you can't find I can provide the info. Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429299 Share on other sites More sharing options...
Steve 97 Posted August 3, 2019 Author Share Posted August 3, 2019 Ya I couldn’t find it I’m going to make my own lines just need to see where the spot is to put lines on the engine to get the oil to the jakes Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429301 Share on other sites More sharing options...
Mack Technician Posted August 3, 2019 Share Posted August 3, 2019 There’s more than just lines in retro kit. You need bulkhead passages, flow checks, etc. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/58421-2000-e7-460-no-jake-once-oil-hot/#findComment-429303 Share on other sites More sharing options...
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