american bosh pump.

[rustred]

i got a 400 case and would like to know which shaft seizes in this pump, before i remove it. sat for 20 years filter and tank have 20 year old diesel it them. might get lucky or not?

 

[Billy Shafer]

I think Dieseltech. Is going to need some numbers off the pump.In order to help you. I have burned fuel that old because we had no choice.But I wouldn't run a rebuilt pump on.

 

[Dieseltech]

Either the hydraulic head plunger breaks, or the quill shaft that turns the head plunger breaks due to the stuck head plunger on AB PSB pumps..

 

[rustred]

i am implying that due to the fuel being old the pump should be ok and not stuck. i just pulled the lines off now and they are full of fuel. if it had todays diesel i would be worried! i am no rebuilding the pump if i dont have to. plus he knows what pump it is. and what i am getting at ... does the pump have to be disassembled to free it up? this fuel smells old so i think i am ok.

 

[Dieseltech]

DON'T count on the old fuel keeping the pump parts from sticking, then breaking first time engine is cranked! Any traces of water in the fuel WILL stick the plunger when pump sets awhile without running. Only way to keep from breaking a good pump is to remove it from engine, and turn it by hand gently. Just turning the engine to see if it's loose WILL break a stuck pump plunger.

 

[Billy Shafer]

It MAY start and run fine. But understand it MAY not. I have started some that ran fine. But in my line of work(generators). There was no MAY. It had to work. The main problem I have found is water.

Dieseltech is the kind of person. I always had rebuild the pumps for me. He knows better than anyone what can go wrong.

 

[rustred]

as i said i plan to remove the pump to check it but dont know where this shaft is or how to actually check whats stuck everyone is dancing around my question. i definitly want to turn it by hand. will the pump need to be totally taken apart or is this easy unstuck? i have no parts mauual either for reference. as i said i might get lucky with it being free but OFF the tractor.

 

[Billy Shafer]

My last words on it. Yes it may turn and you might get lucky. But why take the chance.

 

[Dieseltech]

I did not dance around your question, I said the head plunger and/or quill shaft is what breaks when the plunger is stuck. Wreck the head, and good luck finding another one.

 

[Fatamus]

Pictures and manuals help communication.
but pictures OF manuals ...

 

[jon f mn]

That is an in-line pump. He has an American bosh rotary
pump

 

[Fatamus]

(quoted from post at 07:48:40 06/12/20) as i said i plan to remove the pump to check it but dont know where this shaft is or how to actually check whats stuck everyone is dancing around my question. i definitly want to turn it by hand. will the pump need to be totally taken apart or is this easy unstuck? i have no parts mauual either for reference. as i said i might get lucky with it being free but OFF the tractor.

Then spend that 1000 bucks on manuals and 25 years of education (school of hard knocks) and learn how to do it yourself
OR
be just a little nicer with some manners and you might get THE RIGHT answer faster
We are just tiring to help so we might ask a few questions that my seem odd to you but we have a different perspective than you do of the equipment. Our combined backgrounds consist of 100's if not 1000's of years of experience. Why would you argue with that?
And Good luck with your endeavor I hope everything works out for you.
Fatamus AKA Fat Dan

 

[Fatamus]

Oops I didn't see that part - Mybad.
see pictures do help

 

[rustred]

my last words , thats why i want to take apart to find out. so what i am asking when turning by hand there must be some way to tell if it has to be taken apart. like is it a light turn by hand or how stiff , none gave me info like that. i am pretty cautious with stuff. not like i dont know when there is a problem. guess i will do my own thing on it then, as i asked if i can free it up or need actual technician. thank you. and with all these broken shafts being talked about i would think a picture posted saves a lot of back and forth posting.

 

[Dieseltech]

Will try to get some photos on soon of a damaged hydraulic head. Here's another thought, head might not have a broken plunger, but due to severe wear the head won't pass low speed cranking fuel delivery on the test stand, especially when hot. I've got two Case 400 PSB heads like that now, not broken, but worn out. Might want to find why the tractor was parked and set unused, might be it wouldn't start when hot..

 

[Olliejunkie]

(quoted from post at 12:59:43 06/12/20) Will try to get some photos on soon of a damaged hydraulic head. Here's another thought, head might not have a broken plunger, but due to severe wear the head won't pass low speed cranking fuel delivery on the test stand, especially when hot. I've got two Case 400 PSB heads like that now, not broken, but worn out. Might want to find why the tractor was parked and set unused, might be it wouldn't start when hot..

I know they say every head and plunged are a match but have you ever tried swapping them around on worn ones to see if they would work?

 

[Oliver 500 Wa]

I got the "don't eff around with an injector pump without really knowing what you are doing" lesson from seeing my neighbor try to fix a leaking pump on his Kubota. Despite him thinking he would be careful enough, he broke something in it and the end result was having to pay ~$700 at a salvage yard for a used one.

 

[rustred]

the tractor sat for over 20 years. the old guys died . farm got sold and the guy got it with farm . he said that it was running before. i found engine stuck also so am pulling the heads today.