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MG MG Y Type - Pedal Shaft Bushes

Hi Folks,

Has anyone replaced the sintered bushes for the brake and clutch pedal pivot shaft.

Are the old ones easy to remove?
Any reaming involved?
Where do I get replacement bushes?

I have the MGCC Y Register publication 'The Y Type pedal box' but this only really covers the clutch pedal bush.

I had assumed (fool) that the set up would be as TD and therefore would use common (therefore easily available) parts but it seems that the pivot shaft differs and so I guess so do the bushes.

I see that NTG supply the shaft....

Regards

Rob
Rob King

... and NTG can also supply the brake pedal bush - D506Y as well as the clutch bush D506L - both numbers the ones they quote for Y, Y/T and YB as opposed to funky T Types Rob.

I am not sure what the relative inside or outside diameters are or why, if they are different, they are different to T Types.

My guess would be to carefully cut through the old one with a small cut-off wheel and stop before you hit the shaft. Then use a small hack saw to gently cut the last bit through after almost cutting through the opposite side with the cut-off wheel too first. The first cut you can use as a pinch gap to gently pry open the fully cut through side with a flat bladed screwdriver. Go gently as you do not want to score the shaft ... or you make more work for yourself.

In this instance, the Haynes method of assembly being the reverse of dismantling is not a good method. The bushes may need to be reemed to fit the shaft to give you a good snug fit and you may want to entrust that to a good machine shop so as not to burr up either your shaft or the nice new bushes from NTG.

Cheers

Paul
Paul Barrow

Hi Paul,

Thanks for your reply, but I need some clarification please.

It seems that the TD had a shaft passing thru the chassis rail and both the brake pedal and the clutch pedal were fitted to the shaft over bushes thus both rotated on the shaft. Consequently Moss supply a brake pedal bush and a clutch pedal bush.

The Y did not require a brake pedal bush as it was splined and pinch bolted onto the shaft, whereas the clutch pedal had a bush as it pivoted on the shaft.

The bushes to which I refer and the ones I need advice in removing are the pair which are captive in the chassis rail. Will they 'drift' out without damage to the tube?

As far as NTG go I can only find 'chassis bush pedal shaft' D506G. Am I looking in the wrong place?

Regards
Rob
Rob King

hi Rob

I was looking in their catalog and just going from the listings they had on that page when I quoted their numbers. Now that you mention it I do seem to recall that the brake pedal is splined as you say. Best bet would be to call Paul Banyard and/Mike Green and ask them why they list them.

As to the shaft bushes in the rail, yes they should drift out OK. You will need a fairly small flat point on your drift and I would say tap all the way around the bush evenly if you are using a pin point, alternately if you have access to a lathe and a micrometer, turn down a piece of bar to the correct diameter of the tube and about 1/16 or even maybe 1/8 inch less so that when you hit the end of the bar it presses evenly against the bush.

What size to replace it with? Well again I will defer to NTG if they have them but again you will be advised to ensure you get a reemed fit on the shaft I am thinking as you do not want too much free play.

Does that make a deal of sense to you? I think I have described what I have in my mind ... but sometimes that is hard to translate into key presses!

Paul
Paul Barrow

Hi Rob,

I have just taken a look at the pedal box on my chassis which by luck is on its side up against the garage wall.
There are 2 bushes one each side of the chassis rail, it looks like you may struggle trying to knock the bushes through as there is about 3/4" gap between the 2 bushes which will probably be corroded. The bushes appear to be about 1/16" wall thickness.

So as the pedal shaft is 3/4" I would suggest getting a punch machined just under 7/8" dia, machine down to 3/4" for about an 1" to locate inside the bush, long enough to knock both bushes through.

Or you might try using an hacksaw blade and put a cut down the length of the bush then collapse the bush in and pull it out with a pair of pliers. Either way it will not be fun trying to do it laid on your back under the car.

Cheers chris
C A Pick

Paul,

Thanks for the advice, I will obviously try to source the replacement parts before I take up the hammer. Will call NTG tomorrow.
There must be someone out there who has already done this??

Chris,

Thanks for your advice...I am in the happy position of having the chassis leaning against the garage wall too.

Regards

Rob

Rob King

Chris's idea of the hacksaw would work if you can find a deep framed larger hacksaw and a narrow enough blade. You could put the blade in upside down to cut the bottom of the inside diameter and therefore be able to pull down on the blade. Then to cut the top side you would clearly need to have the blade in the correct way up but would have to excert upward pressure on the blade as you cut. The U of the frame of the hacksaw would hang underneath the frame.

An electric reciprocating saw-saw saw would also wok but if you use one of these just be careful about how deep you are cutting and remember you only want to go through the bush.

Provided the seats and floor boards are out, a bit of heat on the bushes will not go amiss, however be aware that the original wire loom is routed between the pedal box and the frame along with the Speedometer cable for the Y and Y/T too (the YB has a different route I think off the top of my head).

Paul
Paul Barrow

Guys,

Don't quote me but sure Morris Minor used the same parts you refer to, this has been covered before somewhere, too tired to look now but recall either eBay selling parts for pedal box of Morris, or one of their enthusiasts clubs.

Richard
R E Knight

Are there definetly bushes in the chassis rail then...I dont recall seeing any in mine when I replaced the clutch pedal bush a while back but then again trying to get at the tube in the chassis rail which accomodates the pedal shaft is not at all easy lying on ones back! I wasn't aware NTG sold bushes for the tube in the chassis rail either.
Can we have a full report please with photos when this is finally sorted out. Thanks.
D MULLEN

Dave,

The Y Register technical sheet which refers to Y Type Pedal Boxes includes a cross section drawing showing two bushes within the cross tube. Mr Cairns also suggests that, if replaced, these sintered bushes should be soaked in oil before fitting.

I have spoken to Mike at NTG and although there appears to be such a part listed in their catalogue these bushes have never been available and were not listed by the factory as a service part.

I have tried to attach a pretty poor photo of the bushes in my chassis but it is too high res. A lot easier to see when the chassis is leaning against a wall but still difficult to photograph.

I will try to add the photo later

Rob
Rob King

Rob

Send me the photo and I will resize it and send it back to you or post it for you- whichever you want.

Paul
Paul Barrow

Thanks Paul but I found a way....

As I say...not a good photo...but you can clearly see two brass bushes in the clutch / brake shaft tube.

Rob

Rob King

Great news Rob. Looks like a very good photo to me.

Would it be possible to get a caliper and get a reading on them do you think?

By using the tail shaft of the caliper you should also be able to get a length on them as well as the normal diameter.

I am sure armed with those stats, Mike Green at NTG should be able to source a suitable bush for us to use. If not, then drop me a note here in the US. It is amazing what I can find here! About a month or two ago I sourced some wheel bearings for an MG 18/80 that have been NLA in the UK for ages. I had my local bearing shop look into it and they had them on their counter in 3 days!

Paul
Paul Barrow

This thread was discussed between 15/02/2012 and 01/03/2012

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