mack88 Posted June 6, 2023 Share Posted June 6, 2023 Was wanting to get my injection pump rebuilt but mack said only 50/50 chance of getting parts anyone know where a person could buy a rebuilt according to them need specialty tools to install cause of timing 1987 E6 350 4V Pump Model 300 PLM 4503638 Quote Link to comment https://www.bigmacktrucks.com/topic/72926-injection-pump/ Share on other sites More sharing options...
steeler Posted June 8, 2023 Share Posted June 8, 2023 That's an ambac pump, correct? Our local pump shop we've used for years won't rebuild them anymore because of parts I assume. I'm sure you can find one somewhere though with enough searching. If it's an ambac, you don't need anything special to install it other than a rig to hold the gear while you torque the retaining nut, assuming the new pump comes without the gear installed... Quote Link to comment https://www.bigmacktrucks.com/topic/72926-injection-pump/#findComment-532623 Share on other sites More sharing options...
mack88 Posted June 8, 2023 Author Share Posted June 8, 2023 see what happens might look for something with cat with 3406B Quote Link to comment https://www.bigmacktrucks.com/topic/72926-injection-pump/#findComment-532627 Share on other sites More sharing options...
BOBWhite Posted June 8, 2023 Share Posted June 8, 2023 1 hour ago, mack88 said: see what happens might look for something with cat with 3406B Like injection parts for a 3406B or a truck with a 3406B? On the chance that it Is a Bosch pump and not an Ambac those are real easy to find people and parts to rebuild them. Why do you think your pump needs rebuilt? Quote Link to comment https://www.bigmacktrucks.com/topic/72926-injection-pump/#findComment-532632 Share on other sites More sharing options...
mack88 Posted June 8, 2023 Author Share Posted June 8, 2023 truck with 3406b. Flutter at low rpms loses hold prime after 2 days local mechanic said guy had issue with his losing prime to R600 changed all the fuel lines and it was good after that he said those braided lines suck air over time i'm sure mine are original so hes making new lines for mine. I'm not sure what type of pump mine is but will try and find out its a nice truck shame that parts are obsolete. Quote Link to comment https://www.bigmacktrucks.com/topic/72926-injection-pump/#findComment-532634 Share on other sites More sharing options...
steeler Posted June 8, 2023 Share Posted June 8, 2023 If there are 3 bolts holding the pump to block, it's an ambac, 4 studs with nuts would be the newer bosch. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72926-injection-pump/#findComment-532646 Share on other sites More sharing options...
mack88 Posted June 8, 2023 Author Share Posted June 8, 2023 It's a ambac pump three bolts Quote Link to comment https://www.bigmacktrucks.com/topic/72926-injection-pump/#findComment-532647 Share on other sites More sharing options...
mack88 Posted June 16, 2023 Author Share Posted June 16, 2023 A little bit of digging got reman pump on its way. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72926-injection-pump/#findComment-533026 Share on other sites More sharing options...
JoeH Posted June 26, 2023 Share Posted June 26, 2023 Losing prime is usually the injector leakoff lines along the tops of.the heads. Or at least on the 2v heads that's the case. Not sure how the 4v heads are set up. Quote Link to comment https://www.bigmacktrucks.com/topic/72926-injection-pump/#findComment-533595 Share on other sites More sharing options...
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