Forum

[Old Enfield]

Hi All, I could do with some help on the assembly of my my Model CO primary chain case. I've got 2 questions.

First up, I dont have the steel washer (22937), leather washer (22938), packing coller (23941)and locking plate (27236)that fix the inner case to the crank case and our hosts have Nil Stock. Could anyone with said items not fitted, give me some dimensions so I can try and make some? Also, could anyone tell me how they all fit?

Secondly, can any one tell me how distance washers 22697 and 22684 fit to the foot rest bar? I'm guessing one goes on the outside of the outer primary chain case but I'm unsure if the other (Bigger or Smaller)fits to the other side of the chain case or if it should go on the other side of the bike and bare upon the other footrest, and where does the felt oil seal go? Would any one know the dimensions of the smaller distance piece as our hosts don't have that in stock either.

[Tinshanks]

I rebuilt a '47 Model G and should be able to say something useful about the chain case but it's not easy to do chapter and verse and I don't have any diamensions. In my case the inner case was bent out of shape so there was a lot of putting together, measuring up, removing banging and welding and re-fitting before it all went together properly and was ready for re-assembly. Will it ever keep the oil in? The main thing is to get it to sit in the right position or the clutch or chain will rub on the side or back of the case. Once you have fiddled around you will see there isn't much play. The front mounting bolt has a spacer behind the case of about quarter inch. A suitable old nut or a few washers with plenty of goo should do the trick. The back of the case is held on very well with brackets but one must get the space between the casing and the gearbox sprocket very accurate or the felt seal will either not work at all if too wide or not for long if too tight. The outer case needs to be held tightly and in the right position. I ended up with the large washer outside, slightly smaller washer inside followed up with the felt seal to prevent the oil leaking down the middle spacer tube. It is all very agricultural and bound to leak anyway and I am sure you will work it out with bits of tube and washers to get it in the right position. The good thing is, in my opinion, that the primary chain is better tensioned by moving the gearbox rather than the later models with chain tensioner pad.

[Chris]

I re-built my 1944 WDCO a few years back and remember some bits. I'll try and answer as I recall.

"I've got 2 questions. First up, I dont have the steel washer (22937), leather washer (22938), packing coller (23941)and locking plate (27236)that fix the inner case to the crank case and our hosts have Nil Stock. Could anyone with said items not fitted, give me some dimensions so I can try and make some? "

The large washer and leather washer simply seal the large hole in the outer chain case, the footrest goes against the washer and the nut tightens it down. Inside the outer case is enough tube so that the washer is pulled down onto it, without crushing the outer chaincase and tight enough to have a firm footrest. I just made up the gap with loose washers as required.

Also I used more of the felt washers (32383) to pad-up as required and stop any oil leaks, between the inner case and the engine.

It's a bit vague as I haven't had to remove it for a long time. When you put it together, just think about where a leak might occur and use a felt washer if required. Nothing should be strained, so make sure that spacers are working correctly.