Gear selection

Hi Dan,

I had a similar issue and found that the washers under the two bolts clamping the selector plate (the one with the slot in it) were too large and stopping the selctor moving far enough up or down, I suggest you try with out the washers to check.

Regards

Andrew

Dan, on my Commando it is basically the same mechanism.

The manual says there should be a slight gap between the spring legs and the pawl.

So on your photo it looks ok.

Is the inner cover all the way home?

There is missing a nut on the top left side and the others look loose.

Did you shim the kick start shaft?

Without shimming my gearbox slipped out of

first gear after I shimmed it about 2mm it is ok now.

Dan, nothing looks obviously wrong to me but both Andrew and Uli have fair points to check. Are the spacers properly in position under the selector plate which was mentioned by Andrew. However the spring looks a little bit bent out of shape to me; On all mine the spring just lightly touches on both sides of the rocking pawl. Also as Uli has mentioned the six nuts holding the inner plate seem either loose or one missing. This definitely could make a difference.

I don't think shimming the kick shaft would make any difference but in mine when it jumped out of gear it would at least select the gear -but then jumped out under load.

I spent ages with a dial guage shimming my layshaft to perfection but found the best gearchange was after I left the shims out. Had to accept a compromise in the end.

The Maintenance Manual for the Jubilee says "before fitting, set pawl carrier lever pointing towards kickstarter bush and set the pawl square with the lever. Fit cover, holding pawl spring and washer from moving until the quadrant shaft has entered. "

It does mention that the partly dished washer is fitted with its longest flange outside the spring and that it lies between the spring and the pawl carrier. It doesn't give any info on setting the spring but I still think this is the likely culprit.

It's lovely sunshine here - 17 degrees in the sunshine- and I have a ton of soil to move from one end of the garden to another area 100 metres away. Good exercise with a wheelbarrow !!.

Hi Dan,

I did a pond a couple of years ago but I cheated with that - I borrowed a 360 tracked digger from a local builder who kept his big machinery in some old farm buildings - I only had to put in some diesel . That was good fun as I had never driven one of those before; it is not nearly as simple as I first thought but I can now handle it pretty well. At 13 tonne though it is a bit on the big side to take into the vegetable patch- so that's a spade and wheelbarrow job. Anyway I can now say the potatoes and the broad beans are in- next job is to weed the strawberries . A story of every day country life.

Sounds like a episode from the Archers.

Hi Dan,

Your outer cover looks OK - the pawl spring looks ideally shaped & is holding the pawl in the correct position. The other spring looks fit to throw away - its bent completely the wrong way.

However, I do see one thing that does not look right. The centre of your dished washer shows signs of rubbing - see photo.

From what you write - I can't figure out exactly what item is not working?

Your stop plate looks to be an early design - the later ones were a one-piece pressing, but that alone should not be an issue - either will do the job.

Does your stop plate have the two washers (item 9 in parts list) behind it?

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Previously Dan Field wrote:

Update - I changed the stop plate and fitted it with smaller washers and also changed the return spring, I kept the pawl spring and reasonable success, I now get all gears, Iâm hoping when full of oiled and engine spinning it will be all good!

Unfortunately after Iâd finished I found a ball bearing and circlip on the bench so took it all apart in case Iâd forgotten to put the ball in for the clutch rod ..... Sodâs law I hadnât forgotten, this was obviously one of my spares! Iâm hoping wire the circlip is from the ES2 piston, as I couldnât find anything in the book about a gearbox circlip!

Last thing is I fitted a new primary chain from the club, but itâs pretty tight, itâs almost perfectly adjusted without the tensioner in place, is that normal for a new chain?

dan

There is an outside circlip on the shaft of the gear selector retaining the selector plate. An internal circlip will be used in a piston to retain thegudgen pin.

GRAHAM