CV Joint Dished Washer--Why does Bentley say to discard?

[RalphWiggam]

[Abscate]

Someone probably garnered up the courage to file those Rockfords a bit, Jim.
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[SGKent]

old thread but I was researching this on Google and it hit this thread. The irony is that the kits even with the raised area on the shaft side come with the spring washer. Guess Lobro did not get the message.

The bulletin that started this is August of 1974, (below) which is a new model year where the later transmission and FI engines were coming out in North America, however the bulletin is not country or engine specific. The Technical Bulletin says the item was deleted and that there is no need to put it back when servicing. It does not say, "do not put it back." It sounds more like "we decided we really don't need this for it to work right so you can eliminate it." The 1976 Orange Manual printed in Germany by VWOG does not show the spring washer in the description and service instructions. Below is the 1974 Technical Bulletin and translation:

[Nitramrebrab72]

It is just to save time, VW fitters ,even with the correct tool/system set up were wasting too much time with the finicky sprung washer and the consequences were so minimum as the splines are grease packed as a solid/sprung side to side motion lock is better but not necessary they just decided to deleted it... Unlike oiled splines as per the 091 gearbox output shafts where the spline spring washer were always fitted and no recommendations to remove were ever made, which is totally understandable as unlike grease, gear oil does not have the required viscosity to firstly create a required barrier between the 2 parts, and most important the required viscosity to stop a rotational induced side to side oscillation that would prematurely wear the splines of the gear box output shafts and are therefore a solid/sprung fit.
As regards Bentley who are not VW specialists but more like literature parrots, didn't analyse the removal in detail or just wanted to keep it simple and went with a cross the board decision stating to remove on all models as VW did for simplicity of communication. If it was for a known fault/reason they would of stated why.
As stated by splined drive shaft manufacturers a solid/sprung on greased splines is recommended but not obligatory were as oiled splines it is.

[Wildthings]

This is the translation Google Translate gives:

Starting with the 1975 model year, the diaphragm spring behind the constant velocity joint was removed from all Type 2 vehicles. The T spring is not to be reinstalled, even when repairing existing drive shafts.

The way I read it, VW is saying NOT to reinstall the washer.

[Nitramrebrab72]

[SGKent]

I used Google Translate again three times on it this morning, and in each it cames back the same as an optional delete. The 1976 Dealer Service manual published by VWOG does not show or mention it. My 1971 used them, never gave me an issue putting the circlip on, still wore out. Maybe someone can look at the Vanagon Service manual if they have one.

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"Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin

[Wildthings]

[kreemoweet]

[SGKent]

just finished a search. ETKA shows it up to 1975 then no longer. It is not present in Vanagons either. The main difference that I could see between the bus and Vanagon CV is that the Vanagon CV has a gasket on both sides. One is a 211 part and the other a 251 part.

I am leaving the cupped washer out. Some may still use it but I am Ok with the delete. Someone posted earlier that they had never had any issues with the delete. Hans and his co-worker, Frederick, the two engineers who made the decision back in 1974, have been gone a long time.
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"Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin

[raygreenwood]

[SGKent]

makes sense. From 1975 at the delete, to 1979, the last North American year of the bay, VW sold 1,071,764 buses. If there was a problem with the delete, it surely would have shown up in their technical bulletins, and we would have threads about CVs falling off. Not all mechanics have the tools and skills to compress the washers and then put the snap ring on properly.
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"Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin

[Wildthings]

When I did run the concave washers, I would use a set of duckbill snaring pliers to get them on the shaft and then select a socket that would fit over the shaft but sit at least somewhat on the snap ring and give the socket a hit with a 3-4 pound hammer to momentarily flatten the concave washer. and let the snap ring pop into place. I would then work my way around the snap ring tapping it fully into place. This made the job quite easy.

[SGKent]

[raygreenwood]

Yep....pretty much the same method.

At a later point in time, having some snqp rings with pointed ends in aome kits yhat do not work well wth the duckbl pliers I have taken my dremel with a diamond point and made a small notch on each end and can use pin type snap ring pliers.

Ray