Fuel problem on the Y60 4.2TD

[Bat21]

Just returned home and when switching the motor off it just carried on, it sort of went off for a split second and then carried on again.... off for a second and then carried on again etc.

I lifted the bonnet and discovered this thing (Red arrow). The center was going round and round (Green arrow)

The link rod attached to it was pulling intermittently on this arm that is on the back of the infector pump. I assume it is the cut off thing because when the arm was back the motor almost stopped, but once it had turned another half turn the motor reved up again.

The only way to stop the motor was to disconnect this plug.

With the engine stopped reconnecting the plug causes the round thing to start rotating again even though the key is off

Any ideas what's gone wrong :nenau

 

[Bat21]

I have just removed this Green 30amp fuse from the small fuse block behind the main battery. This stopped the rotating thing from rotating, I then placed it back in and all seems to be ok now, then motor starts and stops as it should do... what the heck was all that about :nenau

PS ignore the temporary fuse for the glow plugs :augie

 

[davemud]

Hi looks like a step motor from the pics and a serviceable one to, screws on front cover give it a way, looks very rusty.
see if you can find that spare one from the scrap yard, then its got to be worth a strip down and service of the old one clean up contacts in side..

Davemud

 

[Bat21]

Nice one, thanks Dave.... I'll try and get hold of a spare and service it before the trip :thumb2

It's not rust on the step motor.... that's desert sand, it gets kin everywhere :doh

 

[floyd500b]

But what does the "rotate-y" thing do?

Agreed it looks like a stepper motor with a crank and con-rod

 

[Bat21]

But what does the "rotate-y" thing do?

Agreed it looks like a stepper motor with a crank and con-rod

When it rotates it stops the engine, I assume that the arm it 'pulls' is some sort of fuel shut off valve (the arm in the second photo).

I have a feeling it does more though because when the engine is being cranked it does a complete full turn then settles :nenau

 

[Bat21]

The rotating thing is aparently an EDIC, I have managed to find this info but it doesn't explain why it went into warp drive.

The EDIC Control

EDIC stands for Electronic Diesel Injection Control. On a Patrol Y60 it is a simple way to turn the diesel engine on and off. It is also the method which which you use to turn the amount of fuel delievered up and down. The EDIC is a little elctronic motor hooked up to a relay that is connected to the key position of your truck. It has three positions: on, off, and start. In the "ON" position it slides a bar that is connected to the fuel pump to a position that allows the pump to deliever it's normal amount of fuel. In the "off" position it moved the bar to stop allowing the pump to deliever fuel, turning off your truck. In the "start" position, which is engaged when you have the key actually running the starter motor trying to start the truck. The start position allows the fuel pump to be in the "over inject" position allowing each cyl to have extra fuel sometimes required to start the truck.

EDIC is considered somewhat of a more modern diesel engine contraption as diesel engines have been around for a long time and previously the way of turning one off was to cut off it's air supply, like a diesel powered unimog which has a lever. When you remove the key in a unimog, the truck still runs. Ironically enough I've rigged my HJ60 to continue to run for a set amount of time after I remove the key to allow the turbo to cool down. This is done through a turbo timer.

In other more complex systems and particularly computerized and electronic systems, EDIC can plays a more crucial role and is sometimes directly integrated into the fuel pump.

 

[Toolbox]

With most inline injection pumps, the rack that operates the amount of fuel the pistons pump to the injectors is pulled to the maximum fuel position by an internal spring when the engine is not working. When the engine is running the governor and or throttle cable react on the rack pulling it back against the pressure of the spring.
When it comes to stopping the engine there is normally a solenoid that is operated when the key is turned off and most often is controlled by a timer unit that allows a preset amount of time for the rack in the pump to be pulled fully back to stop the engine.
What you have fitted looks as though it should only do half a turn and stop when shutting the engine down and then half a turn again after turning the key on to start up.
I would think there should be contacts in the motor much the same as a park on a wiper motor that need cleaning.

 

[Toolbox]

You beat me to it you have answered your own question