MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MG Y Type - Wiper Motor Lucas CR

Hello,

please, can somebody tell me a detail on the wiper motor? What means the pressed in ball -- see arrow in attached photo.
Is it an oil valve to the bearing bush or just the closing of a bore?
I tried with low force to press on it, but it does not move (yet).

Thanks for a hint.
Walter

Walter Prechsl

Hi Walter,
Not a good picture of the ball, can you get one looking directly down at the ball. If is springloaded the outer edge of the ball is covered with a tiny surround (bit like a tiny washer)to stop it falling out?? can you see the end of the shaft below the ball at the back?.
The ball looks as if its recessed a little,if you fill this up with light oil and then gently tap a pin punch on the ball with a toffee hammer you may see the oil disappear.I have a couple of motors with the same idea but the spring movement is very tiny when you press on the ball,If you can see the shaft you should be able to see the oilite bush in runs in, if so turn the motor with the shaft pointing upwards get a small piece of cotten cloth (not nylon or wool or the like) dowse the cotten cloth (cotten wool balls are better) with light oil and place against the shaft, leave for two or three days. the oilite bush will suck what oil it needs by capillary action.
John UMG524
JC Jebb

Thanks John,
you wrote "If is springloaded the outer edge of the ball is covered with a tiny surround (bit like a tiny washer)to stop it falling out?"

It looks like that, but I canīt move the ball. What I can see from the brass bushīs side is a little hole which goes to the ball.
Maybe I should punch a bit harder on the ball?

I just wonder, is there any maintenence rule to oil these motor axle regularly? In that case it would be clear, to have a spring loaded ball valve here.

Walter
Walter Prechsl

Hi Walter,
Maintenance of wiper motors is really quite low, after all it does not really do much work ( unless you live in the Rain Forest!!)compared say with the dynamo which you only need to put a few drops of oil in the back of it or grease the wick every 3,ooo miles,so if you do the same for the wiper that should more than suffice,
John UMG624
JC Jebb

Walter,
The last line of your last posting? do you mean Kommutator Welle??
John UMG624
JC Jebb

Yes, John, I meant this "Kommutator Welle" ;-)

I forgot to mention, this "ball" is to be found also on the other side of the housing. Please look at this photo here. And it is also not to move (without force).

This second oiler is not so easy to access as the other one, it lays a bit hidden on the underside because of the gear housing.

Most probably these are oiling nipples/valves that allow a regular (but seldom needed) oiling? And they probably should be oiled with a little oil can, where the pointed tube pushes the ball in and let oil go in.

So I have to make the ball valves "going".

Walter


Walter Prechsl

Hi Walter,
Are you sure that is a ballbearing?It does not look like one to me looking at your photo as best i can through a watchmakers glass,it looks too flat it's more like a blanking plug also at the top of the ball?plug just to the left of your drawn arrow looks like sehr klein Abstecken Markierung.
John UMG624
JC Jebb

John and others,

canīt you please try this on your Y-type wiper motor -- meaning try to push that ball down?
The one from the 1st image is easily accessible.

Walter
Walter Prechsl

Hi Walter,
Is the motor off your y type?? because it does not look like the lucas CR series wiper motor fitted to Ys and YBs, late YBs had a slightly modifyed motor but that was only a overheat provision.I am still of the opinion that thatyour ball is the top of a rounded end of a securing pin, there is one on the y motor between the gearbox and motor its not an oiler as the picture shows if it were a ball it would fall out and i can't see any signs of staking the other way of keeping it in.If you tap it with a punch and hammer it feels too solid to be anything spring loaded.If i find time i might strip my spare motor down find an answer to what its for. JohnUMG624

JC Jebb

Hi Walter, I have just had a look at my wiper motor and I agree with John - I feel sure that this is a securing pin and is not for any form of lubrication. No matter how "jammed up" it was there would be some sign of movement when hit with hammer and punch. Hope this helps, John PUO 75
J Foster

I have a Lucas Manual which covers the CR wiper.
In the maintenance section, it does not mention any oilers.

Jim B.

JA Benjamin

Thanks for your hints.
Please see again the attached image. Is the wiper a correct version for the early Ys?

At the arrows you can see where one ball (valve/closing?) is. The other is at the back ofv the angle gears and more important at the right image, the little bore which goes from the closing ball to the bush of the commutator shaft. So at least it was planned for a greasing or oiling job?

regards Walter

Walter Prechsl

Hi All,
After stripping a motor down i think Walter is right and i was wrong in some ways, the ball is sealing a shaft which goes down to the oilite bush. In production after assembly a oil impregnated wick was inserted into the shaft which was then sealed with a ballbearing to stop dirt etc getting in,if you bush a probe into hole in bush it feels quite spongy. there are two of these oilways one on the motor and one on the gearbox i have looked at the gearbox one, i think my advice to Walter would be seal one side of bush up with a (plastic cap/ cork what have you fillbush with light oil leave for 24 hours, new grease in gearbox etc reassemble service done fot onther 60years!!
John UMG624
PS i did try plusgas on top of the ball overnight none seeped past the ball.
JC Jebb

This thread was discussed between 12/11/2016 and 20/11/2016

MG MG Y Type index

This thread is from the archives. Join the live MG MG Y Type BBS now