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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Re: Tell me I don't need an injector pump

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samn40

10-03-2013 18:42:33
31.51.74.24



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Have you primed it up with the hand primer on the lift pump? Did it run out of fuel? Sometimes they need a lot of purging to get the fuel to the top bleed screw. Slacken one injector pipe off a few turns and shake it a bit to break the connection . Try to crank it and keep slackening the bleed screws ...tightened up to finger tight should be good enough to start the engine. When the engine runs you can tighten the injector pipe. CAUTION wear adequate protection as diesel fuel can harm your skin! Sam

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Fred Werring

10-03-2013 19:23:11
162.213.224.3



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 Re: Tell me I don't need an injector pump in reply to samn40, 10-03-2013 18:42:33  
Plenty of fuel in the tank.

Never tried the hand lever on the lift pump, figured cranking with the starter accomplished the same thing...is there a difference?

Cranking the engine gets me a lot of fuel out of the lower bleed screw...tightened it back up, loosened the top screw, never got a bit of fuel out of it.

So I need to break an injector line loose while looking for fuel from the top screw?

I did replace the lift pump last winter, actually that was my first thought what was wrong, but it seems to be working from what I'm seeing cranking the engine.

Thanks

Fred

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Dieseltech

10-04-2013 04:34:10
98.206.80.148



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 Re: Tell me I don't need an injector pump in reply to Fred Werring, 10-03-2013 19:23:11  
Top bleed screw is seperate from injector line nuts, it can be bled later with engine running. Fuel must be at each injector with the nuts about 1/2 turn loose to get air out of each line while cranking with stop in run position. When you see air free fuel tighten the nuts and start engine. If you never get fuel at the injectors, you have pump trouble.



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Fred Werring

10-04-2013 11:27:03
162.213.224.3



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 Re: Tell me I don't need an injector pump in reply to Dieseltech, 10-04-2013 04:34:10  
Upon further review...

THOUGHT I had good air-free fuel flow from the bottom bleed screw, but found that wasn't the case, all kinds of air. (in my defense, it was getting dark, was hot, tired, aggravated, blah blah blah)

Went back to my original suspect, the lift pump, found it's not pumping at all. When I opened it up, found both of the check valves had come un-staked from the casting. Ever had any luck staking those back in?

So I guess the fuel that was coming from the lower bleed screw was the injector pump moving fuel around, had I used the hand lever instead of cranking the engine, would have figured out it was the lift pump last night.

Thanks to you and Sam for the replies

Fred

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Dieseltech

10-04-2013 13:27:11
199.16.223.2



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 Re: Tell me I don't need an injector pump in reply to Fred Werring, 10-04-2013 11:27:03  
Never had much luck with restaking the valves once they come loose, might work awhile but they usually get loose again. New assembly works best.



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Fred Werring

10-04-2013 16:51:05
162.213.224.3



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 Re: Tell me I don't need an injector pump in reply to Dieseltech, 10-04-2013 13:27:11  
Got a new pump coming, wont be here till next Wednesday.

Put the valves back in, staked them with a chisel and screwdriver, tractor was still running when I got it back up to the shop and got the loader off of it. The hood won't open but 3" with the loader on, makes it fun getting it bled.

I'll put the new one on when it gets here, maybe keep this one on a shelf for an emergency backup

Thanks again

Fred

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