Transmission oil pump question

[DuaneB]

Hi. I'm new to the forum. Currently, I'm deep into a frame-up of a '57 MGA.

I'm inspecting and - maybe, but hopefully not - rebuilding my transmission and have a question about the oil pump.

This is the part listed by Moss as a "spacer" on the ouput mainshaft, next to the spedo gear.

On mine, the pump/spacer rotates freely around the mainshaft. Is it supposed to do this, or is it supposed to be fixed to the shaft and only rotate when the shaft does?

Thanks for any help.

Duane B

 

[Dave Russell]

Hi Duane,

Welcome to the forum. Guess that the MG guys must be sleeping. If this is wrong I'll bet that this wakes someone up.

I'm not exactly sure what part you are refering to. To my knowledge, there is no oil pump. Are you refering to item #83 in this diagram?
https://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexID=29221
If so, I would think that it is just clamped by the nut #84. Not keyed or anything.
D

 

[DuaneB]

Yeah. I think that's right. It apparently is somewhat of a pump, though. The spacer/pump has a hole at the end of a spiral groove and there is a matching hole in the shaft that lines up with it. I think it supplies a small amount of oil to the insides of a couple of gears. I tightened up the nut retaining the speedo gear and everything is solid now.

Thanks - and, nice Healey.