B275 stops running

It has been running perfectly for the last 10 years and recently I replaced the glow plugs as it was hard to start in the winter.

It worked perfectly after this for about two weeks, now after about 10 - 20 mins of running it just shudders to a stop.

I have replaced fuel, ran injector cleaner, replaced fuel filters, bleed the fuel injector pump.

It doesn't matter how many times I turn it over or try to crash start it. It then sits for a few days and then after many times turning it over it will fire and run well for another 20 - 30 minutes.

I have had the injectors looked at and they were fine too.

The only thing that I can think of now is that the timing is out???? It has a fuel injector pump on the right hand side of the engine, (looking from the front).

Can anyone shed some light on how this operates? And whether it easy to check if it is setup correctly?

Thanks for all your help it is greatly appreciated.

Cheers

Daniel

I have bled the system again and it has started first time. I also took the oil filled air filter off and replaced the oil in this.

I have taken some photos to see if the fuel injector pump can be identified. It is fed via to fuel lines from the canister fuel filter. It also has a pipe that comes down from the exhaust manifold and goes into the front of the case where I assume the drive cog is.

Here are the photos....

Http://hindry.net.nz/photography/tractor/sm0003.JPG
Http://hindry.net.nz/photography/tractor/sm0002.JPG
Http://hindry.net.nz/photography/tractor/sm0001.JPG

Thanks

Daniel

The later B275s have CAV rotary pumps and the governor is all inside the pump.

I mention that because the older B275s can get stuck air shutters and act like they're running out of fuel. It happened twice to mine from mud-wasps plugging it up.

On both my B275s, they've died slowly, and would then restart after sitting. That was caused by diesel bacteria plugging up the fuel screen in the tank. Very easy to fix once you know what it is.

Hope this helps.
JimB

Sounds like the fuel system is sucking in air, while running. Then after it stops, if given time it will purge the air by graviety as the fuel tank is above the pump. If that is the case, the leak must be very close to the pump, even within the pump. The reason I say this, you don't mention having to bleed it to get it restarted. Quite often cracks in the fuel system can cause this, either lines, fittings, filter bases, even pump housing. I can tell you, some of these cracks can be hard to find, especially if it's small enough to suck air, yet not leak fuel.

One other thing could the return line from pump to fuel tank be plugged. I've never had this happen, thus I don't know the symptoms, but have noticed in discussion it causes problems. There are guys here on YT with this experience.

When it is running it runs brilliantly, no smoke full power. No missing at all.

When the fuel lines are removed from the injectors, how powerful should the pressure of the fuel be?

They tend to squirt out a jet about an inch in length.

Cheers

Daniel

JimB

When you bleed the pump make sure you get fuel coming out the top hole in the injection pump. This is where the governor control resides and it relies on Diesel fuel for lubrication.

Still believe your tractor problems are fuel related.

JimB

Placed an inline fuel cartridge in with a clear body so that I can see the fuel flowing.

Bled the tractor and it started first time. Runs better than it ever has.

Took it for a test drive, up some hills etc didn"t stop once. Hooked the boat up to it this morning, and only got about 500 meters down the road and it died again.

I am going to have a look at the diesel fuel injector pump filter and see if that is blocked too.

Only seems to be when under load it dies.

I don"t think it is air in the fuel lines, I introduced an air leak the other day, and the tractor didn"t miss a beat when sucking in air.

Cheers

Daniel

Here in New Zealand Diesel fuel has had something removed from it recently, might be sulfur? From what I have found it was used as a lubricant.

I am going to go to the shops and see if I can find an additive to add to the fuel.

Put it back together and runs a treat.