Metering Oil Pump to clutch cover fit

[wayne]

I'm stumped. I'm trying to reinstall the metering oil pump on to the clutch cover. I've done this in the past on one other bike and there was no issue. But something is amiss this time.

If I fit the metering oil pump driven spigot into the slotted end of the drive shaft (10) and try to fit the metering oil pump body flush with the clutch cover, I get about a 1 mm gap between pump body and clutch cover.

The standard gasket is only around .25 mm so it's not going to take up the gap.

The shaft that drives the pump (10) has a slotted drive end and the other end has a gear which is driven off the timing gear. This shaft has a single washer (11) on the end inside the clutch cover where the shaft sits in a casting in the alloy.

The metering pump itself was not dissassembled. What is going on here ? Anyone encountered similar ?

I have since partially disassembled the metering pump to ensure that it's driven shaft is properly seated and not catching on the internal worm drive preventing it fully seating. It is seating correctly. I can also feel that it is the end of the metering pump shaft itself which is the "high point" and not the removable alloy housing which contains the tiny oil seal inside the body of the pump. That housing is definitely seated properly.

It's hard to explain what's going on here and probably even harder to try and help but I've run out of ideas.

If I remove the washer at the end of the drive shaft inside the clutch cover, the seating problem would be solved but this washer was there on disassembly and is shown in the parts book.

Any ideas appreciated.

Thanks,
Wayne

[steveuk]

on all my re5's the washer was at the slotted end of the pump drive shaft and the spigot on the pump goes through the hole in the washer and then into the slot.

when i assembled as the drawing shows with the washer the other end and bolted the pump housing to the clutch cover it would lock up the drive shaft, i have tryed this on 4 engines, so i think the drawing is wrong.

steve

[wayne]

Steve, I think you have it.

Despite taking 500 + photographs of the disassembly, I missed this particular component.

However, after reading your post, I first tried what you said and that does work although, strangely, that washer is pretty sloppy up the other end.

In light of your comment, I searched my photos again and found another one which just happens to have the base of that shaft incidentally pictured in its original position partially obscured by the timing gear. Blowing up the picture I can see that the washer was not on the end of the shaft as pictured in my parts book.

But I wouldn't have been that confident without your comments as the picture needs to be blown WAY up.

Also I note that both the metering pump drive shaft in the clutch housing and the tacho drive shaft have the same machining on their supported ends behind the timing gear. And the tacho drive doesn't use a washer at that end so why have one on the other shaft ?

Many thanks Steve, I've been toying with this for days and it's the only thing holding back reassembly of the right side of the bike. The whole left side is finished.

There is more than one error in that parts book and I note both my early and late books show it incorrectly.

Cheers and thanks,
Wayne

[ziggystardust]

I can confirm what Steve says is correct, the drawing from the service manual is wrong.

[Jess]

The drawing is wrong...

The washer goes at the other end..

Best,

Jess

[ziggystardust]

[wayne]

Thanks Ziggy, Jess.

That's the photo I missed taking and I couldn't remember how it had come apart as it was well over a year ago.

Much appreciated, the photo gives me full confidence as well. Great help from you all.

Thanks,
Wayne

[Jess]

Gosh Ziggy... I feel soooooo trusted Don't you?

Just giving you crap Wayne... ;D

Best,

Jess

[wayne]

From you Jess......................I'd expect no less ! : )

Cheers,
Wayne