John Deere 3640 won't run.

[TMP]

Morning all I've been out to a JD 3640 that has had a few people at it and a lot of new parts. It started with suspected fuel problems which lead them to fit new injectors and recondition the injection pump. I've had a look and I've got lots of fuel at the injectors but she won't fire it will only fire once with lots of heat but still won't pick up and run. Just looking for ideas before I start stripping it down.

Cheers Tom

 

[Tractortech]

Now Then..
How was it running before all this?? Was it running evenly, did it stop suddenly, was there a clatter from inside the engine??
How does it sound now when you spin it over with the starter...
Have you slackened the injector pipes at the injector end rather than the pump end to bleed it??
I always put new / JD Reman or Vapormatic injectors in..

 

[L P]

Morning all I've been out to a JD 3640 that has had a few people at it and a lot of new parts. It started with suspected fuel problems which lead them to fit new injectors and recondition the injection pump. I've had a look and I've got lots of fuel at the injectors but she won't fire it will only fire once with lots of heat but still won't pick up and run. Just looking for ideas before I start stripping it down.

Cheers Tom

Are you certain it's properly bled? See what the fuel flow is like coming out of the tank to the filter first. Then check it from filter to pump. Check lift pump seals. Make sure tank is reasonably full so you have a head of fuel to push air out. Use an airline in the filler with a bit of rag to slightly pressurise the tank if needs be, crack off all injector pipes at injector end for initial prime, then tighten 4 and it should fire.

 

[clbarclay]

Check the timings of the injector pump. I've known people refit injector pumps and distributors out of phase. The result is they fire at just the right angle before tdc, but into cylinder that is just finishing it's exhaust stroke and the valves are open.

 

[Rs chunk]

Haters be hating but try some easy start, but don’t go mad with it. Are you getting smoke out the exhaust when your cranking the engine

 

[TMP]

Finally got back to this tractor yesterday and I've now got it running but it won't tick over it's hunting quite a lot.

 

[Timbo75]

Finally got back to this tractor yesterday and I've now got it running but it won't tick over it's hunting quite a lot.

Who's recon the IP ?

 

[TMP]

Who's recon the IP ?

Shorts in Cardiff I believe.

 

[L P]

Shorts in Cardiff I believe.

Bump screw wants a tweak or idle is set too low.

 

[spin cycle]

drawing air from somewhere

 

[TMP]

Bump screw wants a tweak or idle is set too low.

Sorry could be a stupid question but what do you call the bump screw?

 

[ridger]

Seen a 3040 once with a diesel tank up on top of the cab, he was going to make sure the fuel got to the engine anyway

 

[L P]

Sorry could be a stupid question but what do you call the bump screw?

Might have given you a bum steer, think it's a stanadyne pump on 3640, not a bosch, it doesn't have one. 3350 used to hunt badly if tickover was set too low, it would rough idle at 650-700rpm but smoothed out completely at 800-850. I think you can adjust pressure if needs be but need a gauge. Set idle up first.

 

[davidroberts30]

drawing air from somewhere

this^^