Injector pumps

Kiwi Kev · Post by **Kiwi Kev** » Tue Apr 20, 2010 12:56 pm

Can anybody help me identify the types of injector pumps I have.

The first one is on an industrial engine( date casting 6H23) that used to drive a generator. I would imagine it would need to run fairly constant revs for the generator. Now in my tractor, it is pretty constant revs, even under load. Number on the pump is SPE4A75S51?

The second one is on an industrial engine (date casting 26.3.66) It came out of another tractor, but is now in my tractor. No visable number on the pump. Revs are constant with no load, but any load drops the revs. So you are constantly adjusting the revs up and down to suit the load.

What type of pump is it

Post by **Brian** » Tue Apr 20, 2010 4:55 pm

No1 is a Mechanical governor from a Mk1 or Mk 2 engine, early Fordson industrial.

No 2 is either a truck Minimec, it has the brake vacuum drive, or another industrial engine after 1962. This pump should be very sharp and snappy on the governor. Have you checked the oil level in the governor housing? Level plug, below stop control, same level as the lift pump, drain plug on the bottom.

Of course, if its a truck pump it will have different governor characteristics that may not suit a tractor.

Kiwi Kev · Post by **Kiwi Kev** » Tue Apr 20, 2010 9:00 pm

Thanks Brian
Yes, both engines are industrial (with S prefix), and I agree, 2nd governer not really that suited to tractors. Will have to learn to "drive" tractor differently to get most out of it. Will put a foot throttle on(similar to Henks one) to make the engine more controllable.
Will check oil level tonight. What is the correct oil for it.
Kiwi Kev

Post by **Brian** » Wed Apr 21, 2010 7:31 am

Same as in the engine, 1/3rd of a pint.

Kjetil · Post by **Kjetil** » Wed Apr 28, 2010 2:17 pm

I have a similar engine as No 2. Casting code on engine block is 3F21, which I belive is May 21, 1963.

To my knowledge, it has been on a generator.

What is the reason for putting the fuel pump on the Injection pump, like shown in the photo?

My idea was to put it on a NPS Major.

The flywheel is different on this engine, compared to a tractor engine. Can I simply change the flywheel, or is the flywheel and engined balanced to fit each other?

Can I change the governor on the injection pump, or has it to be done by specialists?

Kjetil

Post by **Brian** » Wed Apr 28, 2010 4:59 pm

Because in some applications you had another item, like the brake air pump, driving off the back of the injection pump so the normal lift pump would be in the way.

Flywheel will change without problems.

You could have the pump serviced and fueled to a tractor spec. Then take the lift pump off it and blank the hole.