Dollshead, Upright and Laydown gearbox component

Norvil have this washer, part number 023190. I installed one in the Dolls head box in my 500T.

Andy

Previously Pete McDermott wrote:

Thanks for that Andy, one has now been ordered.As an experiment I had just started making a batch myself from 2mm gauge plate but this solvesthe immediate problem.

Pete

Pete; I have just stripped my Dollshead box to deal with excessive end float preventing good clutch take up. I note the steel washer you refer to which is flush with the face of the gear. The thrust washer is down. 5/64" from 1/4" and the pen washer over the cover bearing has started to take load. My question is did you determine the "new" thickness of the roller retainer plate and did you make any spare? I don't want to fit the thrust and deal with only half the issue.

Cheers

jon

Previously Pete McDermott wrote:

Jon,

I started to cut a few square blanks from 2mm gauge plate and got as far asboring the centre holes when Andy Barwick above kindly pointed me in the direction of Norvil. They have these hidden at the end of their page listing components for "Gearbox - Post-1957" !!

Norvil part number 023190: WASHER - RETAINING - SLEEVE GEAR ROLLERS ******, £16.80 + VAT

At that point I promptly bought one and packed up attempts atmaking them as anywayI wasn't too confident about any DIY attempt to achieve the correct degree of hardness.

There are three small dimples on the face of the retaining washer which should give an indication of wear but if you are interested there are dimensional drawings on Rob van den Brink's excellent WD Norton site.

To repeat what I said at the start, considering these washers were an essential part of every Norton gearbox built for probably a couple of decades, and the factthey seem to be missing or knackered on most sleeve gears found, they would seem a prime candidate to be manufactured for the NOC Spares service.

Hope the above helps.

Pete

ThanksPetegreat help, I had a sort through a couple ofsparesIhad and thethicknessand wearindication allseemed similar,indents intactand flush with theouter of thegear. Iwill insert a new thrustand close it up. Thanks for your adviceand therecommendation of the web site, as you say, excellent source ofinformation.

Best wishes

Jon

Hello

Another option, that will upgrade the gearbox so that this issue never happens again, is to use this kit from Ken McIntosh.

I have used this on 4 gearboxs now with excellant results.

Mark Zenor