Lancia Motor Club Forum Banner
28 March, 2024, 10:48:46 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Need to contact the Forum Administrator? e-mail forum.admin@lanciamc.co.uk, for Database Administrator e-mail database.admin@lanciamc.co.uk      -      Copy deadline for Viva Lancia is 12th of each month.      -      For Events e-mail events@lanciamc.co.uk      -      To Join the club go to http://www.lanciamc.co.uk/join.htm
 
   Home   Help Search Calendar Register  
Pages: [1]   Go Down
  Print  
Author Topic: Dynamo removal  (Read 1884 times)
0 Members and 1 Guest are viewing this topic.
DavidHill
Senior Member
*****
Posts: 127


« on: 20 December, 2021, 12:29:11 PM »

A question on dynamo's....when i rev the engine the fan moves in slightly and touches the radiator making a nasty metal on metal rubbing noise.  I have tightened the large nut holding on the fan blade, but realised it is not that, the whole inner part of the dynamo holding the fan is able to move in and out slightly.  I think my best approach is to remove the fan, take the dynamo off the car and tighten the dynamo up before refitting it to the car and refitting the fan.  My question is - is it possible to remove and reattach the dynamo whilst the radiator is still on the car (as i do not want to remove the radiator if i can at all help it!)

Many thanks
David.
Logged
Raahauge
Senior Member
*****
Posts: 127


« Reply #1 on: 20 December, 2021, 07:28:33 PM »

The answer is that Lancia designed it to be removable but 70 years on things are often not original.
Both the OD of the nut that holds the fan onto it's taper and the ID of the fan itself both have grooves in which should sit a spring clip which engages with both components. There is enough slop in the assembly to allow the nut to tighten the fan but when the nut is undone it is able to pull the fan off the taper, the fan can then be removed and the dynamo can be withdrawn forwards.
If you can remove the nut completely you don't have the clip, if it gets tight then keep going and the fan will come off.
The spring clip is fitted when the nut is inserted into the fan and (as far as I can see) neither the nut nor the clip can later be removed without destroying the fan.
My experience is that the clip is often (usually) missing which makes thing more difficult. I think it would be very difficult to fit the clip in situ.
I have heard that sliding the dynamo forwards sharply, in the manner of a slide hammer works to break the taper though it seems a bit brutal on the rad.
I have the dimensions of the clip (though no spare clips) if needed. Best of luck.
 
Logged
davidwheeler
Permanent resident
**
Posts: 1469



« Reply #2 on: 20 December, 2021, 07:40:47 PM »

I have never seen such a clip and I find the fan comes off without much trouble just by undoing the nut.   I would be interested in seeing the clip and its dimensions.
Logged

David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
Sliding Pillar
Permanent resident
**
Posts: 1702



« Reply #3 on: 21 December, 2021, 07:41:58 AM »

I thought there is a woodruff key on the tapered shaft, but it is a long time since I did any work on an Aprilia.
Logged

1955 Aurelia
1961 Lamborghini
DavidHill
Senior Member
*****
Posts: 127


« Reply #4 on: 21 December, 2021, 07:41:39 PM »

Thanks all for the advice, this morning i removed the nut (the spring clip was missing) and then the fan blade slide off with a bit of gentle screwdriver levering.  There are two big screws that go through the dynamo front to back and they were loose...so I tightened them up and applied a bit of threadlocker and then successfully put the dynamo back in and reattached the fan... problem solved...thank you again!  More noises to investigate now as a shake down the Aprilia - as its finally on the road for the first time in around 30+ years (short trips round the block only currently) and a restoration starting when i bought it in 2013...
Logged
Raahauge
Senior Member
*****
Posts: 127


« Reply #5 on: 21 December, 2021, 08:00:54 PM »

Here is a picture of the spring clip, a car we had many years ago had the clip as has the recent acquisition but the V groove on the fan was so worn that I had to change it. I cut it in half to extract the clip and was thus able to take a photo. I have had a number of spare fans but none with the captive nut.


* CD2C05D1-CA3E-4867-AC3D-02141DA00923.jpeg (77.17 KB, 640x480 - viewed 199 times.)
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Contact the Forum Administrator

LMC Forum copyright © 2007 - 2021 Lancia Motor Club Ltd

Powered by SMF 1.1.20 | SMF © 2006-2011, Simple Machines
Page created in 0.064 seconds with 21 queries.