Old Diesel engine revving flatout
Discussion
So i started up an old tractor that hasnt been started in well over 15 years. All i did was put a battery on it and swing it over. After some swinging it fired up and reved flat out. The throttle must of been stuck open and i pulled the stop and that didnt seem to work.
I got out the tractor and tryed pulling the stop on the pump and that didnt work. So i got some spanners and started undoing all the fuel pipes and that didnt work and just put diesel all over the hot sparking engine. Eventually got the fuel feed to the fuel pump off and that stoped the bugger.
Bit sacry to say the least in this heat wave as well in a barn of hay. Since thought prehaps should of put my hand over the air intake but it could of had a hole somewhere els in the intake.
Any idea why it decided it was going to thrash it self as soon as it started and contine to?
P.s note to self, always put water in the radiator first.
I got out the tractor and tryed pulling the stop on the pump and that didnt work. So i got some spanners and started undoing all the fuel pipes and that didnt work and just put diesel all over the hot sparking engine. Eventually got the fuel feed to the fuel pump off and that stoped the bugger.
Bit sacry to say the least in this heat wave as well in a barn of hay. Since thought prehaps should of put my hand over the air intake but it could of had a hole somewhere els in the intake.
Any idea why it decided it was going to thrash it self as soon as it started and contine to?
P.s note to self, always put water in the radiator first.
Sounds like engine runaway: https://en.wikipedia.org/wiki/Diesel_engine_runawa...
Scary as hell I should imagine!
Scary as hell I should imagine!
hidetheelephants said:
You killed it by shutting off the fuel supply, so probably just a seized/stuck governor mechanism in the injector pump.
Probably, i was woundering if it was the old oily fuel causeing it to revving its tits of. I guess its becuase the pump hasnt moved for years and the valves have stuck in the pump. After reading a few fourms i think im very lucky it didnt explode whislts i was stood next to it choaking on the smoke, trying to stop it. All vrey frightening 😬
The fuel pump is powered by the fan belt so as the engine revs faster it turns the pump faster and if the valve is broke in some way i guess it just kept reving faster and faster till somthing was limiting the fuel supply. So i had a few ways of stopping it and i tryed the hardest. ?? haha ffs lol, shuting off the air intake, stalling it with a high gear but it was a hyra-shift that doesnt really work so probably wouldnt have stalled it, cutting of the fuel like i did via either breaking a fuel line but somthing els that would of worked was throwing a spanner in the works ?? by breaking the fan belt so it doesnt drive the fuel pump.
I dont think it would of lasted much longer had i just run away and preyed that it didnt cause to much damage. Just thank full that the injectors wernt pulling fuel through the excess fuel return pipes. I count my self luncky yet again
I dont think it would of lasted much longer had i just run away and preyed that it didnt cause to much damage. Just thank full that the injectors wernt pulling fuel through the excess fuel return pipes. I count my self luncky yet again
Tom.goode90 said:
The fuel pump is powered by the fan belt so as the engine revs faster it turns the pump faster and if the valve is broke in some way i guess it just kept reving faster and faster till somthing was limiting the fuel supply. So i had a few ways of stopping it and i tryed the hardest. ?? haha ffs lol, shuting off the air intake, stalling it with a high gear but it was a hyra-shift that doesnt really work so probably wouldnt have stalled it, cutting of the fuel like i did via either breaking a fuel line but somthing els that would of worked was throwing a spanner in the works ?? by breaking the fan belt so it doesnt drive the fuel pump.
I dont think it would of lasted much longer had i just run away and preyed that it didnt cause to much damage. Just thank full that the injectors wernt pulling fuel through the excess fuel return pipes. I count my self luncky yet again
Are you sure about the fuel pump running off the fan belt?I dont think it would of lasted much longer had i just run away and preyed that it didnt cause to much damage. Just thank full that the injectors wernt pulling fuel through the excess fuel return pipes. I count my self luncky yet again
Tom.goode90 said:
Yeah its a david brown 1212 i think so its the injector pump.
It's driven off the timing gear.Some have automatic excess fuel so it looks to me like the pump is sticky or rusty inside, it's gone to excess fuel or at least full throttle and got stuck. Local man with van will sort that out.
Willy Nilly said:
It's driven off the timing gear.
Some have automatic excess fuel so it looks to me like the pump is sticky or rusty inside, it's gone to excess fuel or at least full throttle and got stuck. Local man with van will sort that out.
So any man can sort it out? Ive had a van before. Thought you needed to be a engineer or somthing to mess with them Some have automatic excess fuel so it looks to me like the pump is sticky or rusty inside, it's gone to excess fuel or at least full throttle and got stuck. Local man with van will sort that out.
Tom.goode90 said:
Willy Nilly said:
It's driven off the timing gear.
Some have automatic excess fuel so it looks to me like the pump is sticky or rusty inside, it's gone to excess fuel or at least full throttle and got stuck. Local man with van will sort that out.
So any man can sort it out? Ive had a van before. Thought you needed to be a engineer or somthing to mess with them Some have automatic excess fuel so it looks to me like the pump is sticky or rusty inside, it's gone to excess fuel or at least full throttle and got stuck. Local man with van will sort that out.
Edited by Willy Nilly on Thursday 5th July 21:27
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