heavyhauler Posted November 8, 2011 Share Posted November 8, 2011 Many antique Mack trucks were and still are equipped with Cummins diesel engines. I have been told that the single disk injection pump was prone to run away, going to full throttle without warning. It was replaced by a double disk version that was supposed to be an improvement but it was plagued with mechanical problems including chronic leakage. It was discontinued in 1954 and replaced by the revolutionary PT or pressure-time pump. I would greatly appreciate any experiences or comments relating to these early fuel injection systems. Many thanks!John Quote Link to comment https://www.bigmacktrucks.com/topic/21498-early-cummins-fuel-injection-systems/ Share on other sites More sharing options...
dirtywhiteboy Posted November 9, 2011 Share Posted November 9, 2011 PT pump was used up till electronics took over,...right color strips on the spring an a 0 buttun!! Quote Link to comment https://www.bigmacktrucks.com/topic/21498-early-cummins-fuel-injection-systems/#findComment-90335 Share on other sites More sharing options...
heavyhauler Posted November 10, 2011 Author Share Posted November 10, 2011 Does anyone know anyone that can rebuild a Cummins single disk injector pump?? Anyone?John Quote Link to comment https://www.bigmacktrucks.com/topic/21498-early-cummins-fuel-injection-systems/#findComment-90456 Share on other sites More sharing options...
GreenGiant2 Posted November 10, 2011 Share Posted November 10, 2011 we got an old timer out here in alexander. john Oneil. his shop was bought out by waltons milk hauling. john worked for cummins for many many years. he may be able to help you,gg2 Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/21498-early-cummins-fuel-injection-systems/#findComment-90505 Share on other sites More sharing options...
heavyhauler Posted November 11, 2011 Author Share Posted November 11, 2011 Green Giant: Do you have any contact info for John Oneil? Many thanks.John Quote Link to comment https://www.bigmacktrucks.com/topic/21498-early-cummins-fuel-injection-systems/#findComment-90549 Share on other sites More sharing options...
GreenGiant2 Posted November 12, 2011 Share Posted November 12, 2011 John, the phone # is 585 591 2591. ask for john Oneil, there are a few guys in the shop, his prices are alittle high but he knows his stuff. do you have the pump off or is it on the engine.if need be give me a call . cell # is 716 432 4267. gg2 don smith Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/21498-early-cummins-fuel-injection-systems/#findComment-90609 Share on other sites More sharing options...
heavyhauler Posted November 12, 2011 Author Share Posted November 12, 2011 Don: It took 3 attempts to get that pump to work on the 1950 Mack (200HP Cummins) that you see pictured as my avatar. My intent is to try and learn as much as I can about rebuilding these old pumps, and to identify people who could rebuild the pump in the future as a resource. I personally am working on a technical article on SD, DD and PT pumps that should be finished (hopefully) next week so, really, I am trying to pull this all together. Thanks for the info, Don; I'll call John early next week.John Quote Link to comment https://www.bigmacktrucks.com/topic/21498-early-cummins-fuel-injection-systems/#findComment-90682 Share on other sites More sharing options...
red smith Posted January 29, 2012 Share Posted January 29, 2012 If you are interested in having single disc pump rebuilt / repaired call 860 573 8017 or email redsmitheng@sbcglobal.net, have some parts & years of exp. Quote Link to comment https://www.bigmacktrucks.com/topic/21498-early-cummins-fuel-injection-systems/#findComment-100114 Share on other sites More sharing options...
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