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Adjusting wiper blades

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Adjusting wiper blades
#1
  This topic is about my 1950 MG TD
Bruce Cunha Avatar
Bruce Cunha
placerville, CA, USA   USA
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1950 MG TD
1967 MG MGB GT
The right wiper off the motor is not setting flat to the windshield. This is a motor I picked up at a car show.

I rechecked inside the arm. The two curved wedges are in place, and the arm is all the way in.

Can I remove material off the end of the shaft to move it in closer to the windshield without causing other issues?


Bruce E. Cunha


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Re: Adjusting wiper blades
#2
LewPalmer Avatar
LewPalmer Lew Palmer
St. Mary's Point, MN, USA   USA
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1934 MG P-Type Midget
1935 MG N-Type Magnette
"Can I remove material off the end of the shaft to move it in closer to the windshield without causing other issues?"

Yes, Bruce, you can.

Motors come new with the longest shaft needed to fit all vehicles, so shortening the shaft is your best option.

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Re: Adjusting wiper blades
#3
Bruce Cunha Avatar
Bruce Cunha
placerville, CA, USA   USA
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1950 MG TD
1967 MG MGB GT
Thanks Lew. Thought so, but wanted to confirm before I started.


Bruce E. Cunha

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Re: Adjusting wiper blades
#4
GB3 George B
Winter Haven, USA   USA
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I don’t think that is the problem. My original motor shows about the same amount of exposed shaft. Your arm is straight with the base part. It should be angled down a bit, with the spring pressing it against the glass. Many of the new crossbar links have ends slightly too long and square, which bind and won’t allow the arm to pull down to the glass. Remove the link and check the arm movement, as well as the arm spring pressure. The arm with no blade uninstalled should have quite a bend in it at the hinge passively resting. Your later TD style arm appears to have been repaired, with a rusty nut rather than a rivet. George

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Re: Adjusting wiper blades
#5
Bruce Cunha Avatar
Bruce Cunha
placerville, CA, USA   USA
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1950 MG TD
1967 MG MGB GT
Learning more with each post. Yes, the cross arm is new. I will take it off and see what that does for the blade.

I was not aware the arm should have a rivit. That bolt has been in there for some time. Perhaps 50 years.


Bruce E. Cunha

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Re: Adjusting wiper blades
#6
chrismgtd Avatar
chrismgtd Christopher Couper
Shingle Springs, CA, USA   USA
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1952 MG TD "IMoGene"
Bruce: You also have the wrong wiper arms for a early TD. You should have these:

https://mossmotors.com/160-690-wiper-arm-left-nut-on-front

After you get the arms the test will be that the left and right arms should be the same distance from the frame. So check the distance at the idler and make the motor one the same distance from the frame.


Chris
https://www.mg-cars.org.uk/mgtd/
https://www.mg-cars.org.uk/mgtf/

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Re: Adjusting wiper blades
#7
GB3 George B
Winter Haven, USA   USA
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There may also be an issue that the hole for the cotter pin in the bar is too small. There needs to be a little play to allow the angle to change as the wiper sweeps. I have a NOS bar, if I have a chance will look at the ends and measure. George

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Re: Adjusting wiper blades
#8
Bruce Cunha Avatar
Bruce Cunha
placerville, CA, USA   USA
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1950 MG TD
1967 MG MGB GT
That is what my left arm looks like. So both should have the nut on the outside?

Ok. I found the right arm with the nut on the outside. I will get that ordered right away.

Another difference between early and later TD's. Looks like this change came well into production.

Thanks Chris. Education went up another knotch.


Bruce E. Cunha



Edited 1 time(s). Last edit at 2024-04-26 01:58 AM by Bruce Cunha.

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Re: Adjusting wiper blades
#9
Bruce Cunha Avatar
Bruce Cunha
placerville, CA, USA   USA
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1950 MG TD
1967 MG MGB GT
George that also could be. This is an aftermarket replacement.

My original bar had the cotter pin holes in the wrong side. Instead of the bend for folding the windshield going towards the windshield, it pointed up (or down).

I have no clue of the story on that. I got it that way back in 1972.


Bruce E. Cunha

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Re: Adjusting wiper blades
#10
GB3 George B
Winter Haven, USA   USA
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https://mossmotors.com/160-690-wiper-arm-left-nut-on-front

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Re: Adjusting wiper blades
#11
LewPalmer Avatar
LewPalmer Lew Palmer
St. Mary's Point, MN, USA   USA
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1934 MG P-Type Midget
1935 MG N-Type Magnette
The wiper arms with the nut to the front are a pre-war pattern. Not used on TC or later. The post-war arm has the nut to the rear.

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Re: Adjusting wiper blades
#12
GB3 George B
Winter Haven, USA   USA
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Lew, For the first time ever I disagree with you. See the Moss listing for car change over. There are a ton of pictures of unrestored TDs on the net with the nut on the front. George

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Re: Adjusting wiper blades
#13
LewPalmer Avatar
LewPalmer Lew Palmer
St. Mary's Point, MN, USA   USA
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1934 MG P-Type Midget
1935 MG N-Type Magnette
George, I don't have my parts lists in front of me, but the pre-war cars certainly used the forward nut arm. I'm no longer a T-type font of knowledge, so I will bow to your knowledge. However, the both the Moss and Abingdon Spares catalog and others show the front facing nut as appropriate for late TDs and TFs, while the early TDs and TC used the front facing nut. Moss claims the changeover was at TD22316. It depends on the year of the car which dictates which arm is appropriate.

So I got some of it wrong. I had better stick to my Triple-M MGs and building and selling LEDs for British cars.

Cheers,
Lew

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Re: Adjusting wiper blades
#14
Bruce Cunha Avatar
Bruce Cunha
placerville, CA, USA   USA
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1950 MG TD
1967 MG MGB GT
Moss says the front nut arm goes to 22316. The back nut for TD after this and the TF.

I note that Brown and Gammons also lists an early and late TD number for the blades.

NTG says the front nut is for the TA through TC and YT. They list the back nut arm for the TD.

My parts manual from 1958 shows this (see picture). So that seems to go along with what Moss has.


Bruce E. Cunha


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Re: Adjusting wiper blades
#15
GB3 George B
Winter Haven, USA   USA
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Photos of original Lucas wiper bar. Note how oval the holes are. They are also very close to the end of and edge of the bar. Note rounded cross section. My 10 year old replacement bar is totally square. I suspect the repro bar's contour, likely round holes, and not being so close to the end cause the binding/lifting of the arm off of the glass. George


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