A10 oil pump spindle

[Greybeard]

I have read that I should put a piece of gasket under the spindle end nut shaft as there's a gasket under the main body, maybe that's making the body twist?

If you did not put that gasket thickness packing under the third attachment you will have problems. The whole area of the crankcase where the pump fixes was machined in the factory to the same level so as there is gasket under the two main fixing's the third one needs to have the same thickness of packing to keep the pump straight. There is a gasket available, (from SRM?) that covers all three studs.

[muskrat]

G'day Stu.
The old worm out of my plunger is 20.07mm = 0.790"
The body of the pump has probably already twisted without the gasket under the nose.
Back to square one. Pull it apart, lap the plate & extension housing, check the tongue on the driven gear, assemble. Then lap the mounting surface flat. As already mentioned a gasket the same thickness under pump at the third stud.
I've said many times the oil pump is the heart of the motor. It MUST be working properly.
Cheers

[Stu]

Great advice, thanks I'll try that tomorrow and let you know how it comes out.
Cheers

[bikerboy]

Everybody always goes on about making sure the gears go back in exactly the same position where I dont think they can go back any other way? Two of them are thicker than the other two so only fit one side of the pump and they can only go a certain way up because of the drive system. Thats my experience anyway. I mean please correct me if I am wrong but I just went to the workshop and took one apart to convince myself and it will only go back together one way anyway. The only thing that can be put in differently is the shaft that two gears run on.

[Catz]

Everybody always goes on about making sure the gears go back in exactly the same position where I dont think they can go back any other way? Two of them are thicker than the other two so only fit one side of the pump and they can only go a certain way up because of the drive system. Thats my experience anyway. I mean please correct me if I am wrong but I just went to the workshop and took one apart to convince myself and it will only go back together one way anyway. The only thing that can be put in differently is the shaft that two gears run on.

ACE, it's an acronym for A*** Covering Exercise, happens all the time in the workplace.

[Worty]

Bergs had three of mine to look at - he ended up at the pub with the Black and Tans to steady his nerves 

[muskrat]

G'day BB.
What I was meaning is tooth for tooth, like the dots on the timing gears. I have found that if their a few teeth out no matter what I did it would have a few patches of light resistance.
The other cause of stiction is doing the through screws up uneven. I put them in finger tight then give it a spin Then tighten a little and spin again a few times till their tight.
Heart surgery .
Cheers

[Greybeard]

I think they mean match the gears tooth for tooth, (Musky got there before I'd finished writing). When I dismantled the new pump I'd bought I couldn't get it to work again. I took it back to the supplier and apologised. He sorted it out for me.

[Stu]

I checked the gasket and I hadn't put a piece under the screw end. I also remember putting the pump on slightly loose, then tightening the four bolts in situ as it was easier to get on. I won't do that again. I'll try lapping the body, cleaning it perfectly, adding the extra gasket and see how it goes.cheers

[bikerboy]

muskrat/ greybeard

Get where you are coming from :)

[Stu]

Ok.
Job done.
Stripped the pump, flattened all the surfaces, lots of bumps, not rusty but some swelling, dunno what caused that but as soon as I started they showed up immediately.
I assembled it on a flat surface and still has a little sticking, as I did the last 1/8 turn off tree screws it stuck.
I turned one of the cogs around, tightened even slower while spinning and turns lovely when a finger tip.
I put since gasket under the thin end, bolted slowly and tested by turning the engine over with a spanner and the worm turns the pump easily.
Now I'm just waiting for the cog to go with the electronic ignition and I can seal up that side.
After that it's a few wires and a bit of juice and I can see if it'll start.
If I struggle again I'll just fly one of you out here, bets on me.
Cheers