Brooksz Posted March 30, 2018 Share Posted March 30, 2018 Has anyone ever worked on android fuel assembly on Bosch fuel pump and changed diaphragm? Cannot find out if it can be replaced while still in truck without removing injection pump. Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/ Share on other sites More sharing options...
fjh Posted March 30, 2018 Share Posted March 30, 2018 (edited) Remove the 4 screws and replace the diaphragm some have one tamper proof cap you need to work with what have you to get that out! Did you confirm it was bad with the info last post? you can also take the bulbus end off 2 screws and tunn the allen screw right in how ever this will make the thing lay down black soot when you get on the throttle your dot may can your ass for it! Edited March 30, 2018 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395473 Share on other sites More sharing options...
Brooksz Posted March 30, 2018 Author Share Posted March 30, 2018 Thanks I will get it to my garage this weekend and see how it looks. Appreciate your help Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395475 Share on other sites More sharing options...
fjh Posted March 30, 2018 Share Posted March 30, 2018 Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395476 Share on other sites More sharing options...
fjh Posted March 30, 2018 Share Posted March 30, 2018 (edited) Simular to yours the idea is the same! it can be done with out total disassembly ! Edited March 30, 2018 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395477 Share on other sites More sharing options...
Brooksz Posted March 30, 2018 Author Share Posted March 30, 2018 You have a video of them taking that android valve apart with the four screws. Or is it very easy to unbolt and put new diaphragm in. Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395479 Share on other sites More sharing options...
fjh Posted April 1, 2018 Share Posted April 1, 2018 take the 4 screws out it will become evident what you have to do the vid above is similar how ever it is not necessary TO take off any more than the 4 screws on the out side edges and the the diphram is held together with a bolt rather than a nut if I remember correctly! the trick is getting the dam tamper proof one out! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395634 Share on other sites More sharing options...
Brooksz Posted April 1, 2018 Author Share Posted April 1, 2018 Ok great I was worried when I watched the video and he was using a measuring device to try and get everything back together. Way over my pay grade. Really hope that’s what is wrong and get some power out of this truck. Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395671 Share on other sites More sharing options...
Brooksz Posted April 2, 2018 Author Share Posted April 2, 2018 Does anyone happen to have a video or instruction on how to turn the pump up ? E7 350 1996 mechanical motor Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395687 Share on other sites More sharing options...
fjh Posted April 2, 2018 Share Posted April 2, 2018 (edited) Is the diaphragm leaking ? did you try what I asked you try first? If so Do this first !!!! get the diaphragm fixed then we will talk! you have to remove the whole top of the govenrer housing as he does in the first vid to increase power! YOU DON'T need to do that !! If the diaphragm is leaking you need to fix that FIRST ! The four screws facing back! the four screws facing down Not Right Now! You don't want to get to aggressive with the stop plate you can Kill the engine with too much fuel! Just saying! You were talking pay grade maybe just fix whats broke for now! JUST SAYIN! Edited April 2, 2018 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395733 Share on other sites More sharing options...
Brooksz Posted April 2, 2018 Author Share Posted April 2, 2018 Ok I will do that first and see how it goes thanks. Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395737 Share on other sites More sharing options...
fjh Posted April 2, 2018 Share Posted April 2, 2018 No problem just trying to help! Check out the diaphragm if its broke fix it ! We can work from there I think its on par with your pay grade the hardest part is getting the screws out! Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395739 Share on other sites More sharing options...
Brooksz Posted April 2, 2018 Author Share Posted April 2, 2018 Haha Quote Link to comment https://www.bigmacktrucks.com/topic/52961-1996-mack-rd688sx-350/#findComment-395742 Share on other sites More sharing options...
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