Motor coupling

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Grumpy-b
Posts: 991
Joined: Sat Dec 01, 2007 12:06 pm

Motor coupling

Postby Grumpy-b » Mon Mar 25, 2013 5:35 pm

It would appear that some of the coupling wear could be caused by misalignment of the motor and gearbox. I have just removed a motor assembly form a vehicle on its third coupling, and thee are no dowels in the motor adaptor or gearbox, so any alignment can only bethrough the mounting bolts.
The parts are available from Citroen,/ peugeot but the details are a bit contracdictory in the parts list. Special order also requires 5 off each of three possible parts.They are also on back order at PSA. But I have got some from Toyota stock. I will post the final part numbers once they are fitted and Im certain which to use..

So coupling wear may not be a forgone conclusion. But if you have a problem, check the dowels before you re-assemble.

Grumpy-b

Grumpy-b
Posts: 991
Joined: Sat Dec 01, 2007 12:06 pm

Re: Motor coupling

Postby Grumpy-b » Thu Mar 28, 2013 9:00 am

It would appear that the part is a 10mm pin 15mm long
The toyota part number is 090250 10232.
PSA part number 6822ct

Its possible that a roll pin could be used instead.
On the vehicle I am sorting at the moment, the pins were missing, the holes are drilled through and the pins slide nicely through it. SO not a lot of good. To solve this I drilled in from the side of the plate and tapped the hole so that a 5mm grubscrw could then hold the pin in place. Both being loctited in place.

Attached is some images of the PSA catalogue and one of an engine showing location of the dowels.

Grumpy-b
Attachments
motor dowels.pdf
(209.34 KiB) Downloaded 32 times

genawin
Posts: 66
Joined: Wed Apr 11, 2007 5:39 am
Location: north somerset

Re: Motor coupling

Postby genawin » Thu May 09, 2013 7:04 am

Our Red car let go of the coupler and lost drive causing some damage to the motor , gearbox and coupler.
P5060004.JPG
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So decided to make a new key and weld it to the shaft then weld the internal damage to coupler and reamed out the keyway plus changed the locking screws from countersunk to pointed which i think was the main cause of the problem.
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P5070008.JPG (38.87 KiB) Viewed 562 times

Grumpy-b
Posts: 991
Joined: Sat Dec 01, 2007 12:06 pm

Re: Motor coupling

Postby Grumpy-b » Thu May 09, 2013 2:40 pm

Early couplings for some reason had two grubscrews at 180 degrees, This gives a nice pivot point and does not secure the shaft properly or push it to one side. The dimples on the shaft do take the grubscrew ends but it doesnt stop the coupling frombeing able to wobble on the pivit so created. They would have been more effective with just one screw. The later ones do have two screws at 120 degrees which effectively pushes the shaft to one side of the coupling. Ideally pushing it to the side with the key way.

Grumpy-b

mattcarr
Posts: 389
Joined: Sat May 12, 2007 2:27 pm
Location: Hampshire

Re: Motor coupling

Postby mattcarr » Fri May 10, 2013 12:45 pm

It is interesting to see the variations on the cars - perhaps this was part of their continuous improvement on them ??

The heater in my car has decided to stop working now - but it is okay at the moment as the weather has improved now. But I will have to schedule in some time to strip it down once more and see what has happened to it. When I turn on the heating I can hear the water pump running, but it just does not heat up - I know it is not drawing any power as the voltage does not drop at all when it is on - it used to drop by 1 volt.

Grumpy-b
Posts: 991
Joined: Sat Dec 01, 2007 12:06 pm

Re: Motor coupling

Postby Grumpy-b » Fri May 10, 2013 2:14 pm

I think continuous improvement is a reasonable way of putting it. As for the heater, if its an element let me know in good time and I will see if there are any spares. If my memeory serves me you have one of the earlier ones with a screw in element.

Grumpy-b

mattcarr
Posts: 389
Joined: Sat May 12, 2007 2:27 pm
Location: Hampshire

Re: Motor coupling

Postby mattcarr » Mon May 13, 2013 9:11 am

I had a another heater fitted, a larger black one that is rated at 3kw.

Grumpy-b
Posts: 991
Joined: Sat Dec 01, 2007 12:06 pm

Re: Motor coupling

Postby Grumpy-b » Mon May 13, 2013 10:26 am

If you have one of the black plastic cased ones made by MEAs, then they dont seem repairable and are approaching £500. Also not generally available. I currently have two to take to bits and see if there is any way they could be repaired. SOmething else to get around to.

Grumpy-b

mattcarr
Posts: 389
Joined: Sat May 12, 2007 2:27 pm
Location: Hampshire

Re: Motor coupling

Postby mattcarr » Tue May 14, 2013 9:31 am

Yes, it is one of the black case ones. Fortunately I shouldn't need the heater at this time of year.

Grumpy-b
Posts: 991
Joined: Sat Dec 01, 2007 12:06 pm

Re: Motor coupling

Postby Grumpy-b » Mon Jun 03, 2013 8:05 pm

This is a prototype of my replacement coupling.

Using a clutch centre gives a degree of flexibility missing in the original.

Grumpy-b
Attachments
P1016195.JPG
P1016195.JPG (236.37 KiB) Viewed 530 times


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