Thread: Accelerator Adjustment

first off see if the lever actually moves towards the stops.

Yep, when moved manually the lever will touch the fuel screw, and do so with the fuel screw wound out another 3 full turns. (but i've since wound it back).

Those 2 screws in your pics are the idle speed and maximum speed adjustments.

The full load fuel adjustment screw is on the side of the governor, not the top.

Originally Posted by Bush65

Those 2 screws in your pics are the idle speed and maximum speed adjustments.

The full load fuel adjustment screw is on the side of the governor, not the top.

Well that is a revelation that explains a lot! as a positive though, I am very good at making an .... of myself in public

Awesome thread. I'll throw you a bone flagg and say that I don't know where the fuel screw is. Initially I was expecting a lock nut and screw facing outwards of the injector pump (which is maybe still true). But when I read this, I thought, "OHHH that IS the fuel screw!". haha Better you starting a thread than me though.

Obviously I'm of no value on that topic, but I can at least provide a photo of my cable mount. No rivets on mine.

Fuel screw is on side of pump towards the back. It turns into the side of the pump. There's a pic on here somewhere.

Just be careful how much you adjust it. A little does a lot.

This pic shows the full load fuel adjustment screw (bottom centre of pic).

There is a tamper-proof shield over the head of the screw and the locknut.

Be careful removing the shield, someone on another forum was too ham-fisted and broke the housing. From memory, if you spin the shield around, you can find a longitudinal seam, where you can start to pry it apart to reveal the screw.

If yours has a drilled screw and a seal with wire, instead of the shield, that is a sign that the pump has been serviced by a diesel injection shop. That is what your pic of the maximum speed screw looked like (stock that screw has the same shield).

To increase full load fuel rate, back the screw out, so that the lever can travel further before it stops against the screw.

Thanks everyone. In my defence, when reading the injector pump manual the general description diagram only shows the speed screw, and not the governor screw. This was reinforced when I installed the turbo, a twist of the speed screw got me from 6 to 16 psi.

I also misunderstood the speed verses load thing. I've read (or understood) governor adjustment as only having an effect when you give it some boot. For some reason I though that was speed of the engine, not load on the engine. ie, you move the accelerator a little bit, not change. You put your foot to the floor, big change. However I have learned now that the governor has a HUGE effect throughout the whole rev range. It changes the amount of fuel the IP provides when the engine is under any load - small or large. So even a small change in the accelerator gives a much larger squirt of juice to get the engine in balance again.

1.5 turns on the governor gives me 22psi, 525 DegC EGT max and a whole lot of oomph. Huge change also in exhaust note. The 3" mandrel high flow has quite a growl when you give it some boot.

To the original question though - yes my accelerator cable is knackered doesn't have the throw it should. But now it doesn't matter that much.

I hardly knew one end of a spanner from the other when I got this 110.. and it really is a great thing to be learning with