injector pump

[naildriver]

I did a search and did not find what I was looking for but I recall seeing it at some time. My question is oil for the injector pump. Does it use oil from the engine or have it's own. If so, what kind and where?

[Mark]

Diesel fuel lubricates the injector pumps on our tractors.

[jambug123]

if your tractor has a mechanical governor you change the oil at the same time as the engine oil, it uses the same oil as the engine,
if you have a pneumatic governed pump you do not need to do any maintence apart from cleaning the filter capsual.

Regards
James

[naildriver]

if your tractor has a mechanical governor you change the oil at the same time as the engine oil, it uses the same oil as the engine,
if you have a pneumatic governed pump you do not need to do any maintence apart from cleaning the filter capsual.

Regards
James

I think it is mechanical by the pics in my manual also it is a 64 model. Super Dexta. So, Looks like conflicting info here or maybe I misunderstand. Oil or no oil??? Also, in my pics in manual, It shows a fuel filler??? Do I fill before attempting to start or does pump move fuel "through" if I open bleeder??

[jambug123]

you have oil in your pump if its a super.
there is a priming lever on the feul pump which is mounted on the side of the injection pump, you open the bleeders and pump oil through using the lever on the pump.

Regards
James

[Dunggatherer]

If you own a 64 super most likely you have a mechanical pump.
You can see a big square nut on top,that's the filler plug.
On the bottom there's a hex nut,the drain.
On the side,just above the two bolts that set the RPM there's the level plug.

Take out the drain and the filler plugs,and hope there's oil pouring out.
Then replace the drain and remove the level plug.
Now pour oil in the filler hole till it runs out of the level hole.
Put the filler plug back in and go and have a cold one,job done!

Good luck,Rob.

[Bensdexta]

Ref lubrication of pneumatically governed fuel pumps on earlier Dextas, I agree that the owners manual makes no mention of lubrication.

However the fuel injection shop who reconditioned my pump say it is a good idea to put some motor oil into the cambox to lubricate the cams and lift pump arm. This can be done by removing the inspection cover plate on the side of the pump.

I note also that the workshop manual Section 4 - Fuel System, page 11 para 14 says: "Add engine oil to the cambox until it runs out of the oil level hole at the base of the pump."

Also what is the purpose of the pig-tail in the pipe that fits into the oil level hole?


Is it to trap oil? But it doesn't come high enough to keep oil at shaft level in the cambox?

It's all a bit of a mystery??

[Dunggatherer]

Guys,if you visit the old board,then on the Dexta forum there,1st page,there's a post called "Fuel Pump".
There Brian explains the difference between the two types of pumps,and also the purpose of the pigtail.

Have fun!

Rob.

[Bensdexta]

Guys,if you visit the old board,then on the Dexta forum there,1st page,there's a post called "Fuel Pump".
There Brian explains the difference between the two types of pumps,and also the purpose of the pigtail.

Thanks, Rob - yes, it's good to Search. So it seems Mark was correct - pneumatic pumps are lubricated by diesel.

Diesel leaks into the cambox and lubricates the cams & bearings. Any excess diesel then drips out through the hole at the base of the pump. The pigtail forms a fluid seal to stop dirt getting up the pipe into the pump.

So if you see the ocassional drip of diesel from the pigtail, all should be well.

[Mark]

Ben,
By jove I do believe you've got it!

[Brian]

I've been telling people that for 40 years and people still think that you have to put oil in the cam box, even if it is diluted with diesel and gone in a few hours.

Ben is our first convert!

[Bensdexta]

It's the expert tuition to be sure!
But I will be watching for those drips of diesel

[Mark]

Brian,
I have to give credit where credit is due, you were the one that told me that along time ago.