Crank Pulley and Generator pulley

[Spendo65]

My Crank pulley and generator pulley are out of alignment which is creating a throw off problem with belt. Has anyone had this problem. It is racking my brain!!! The Generator pulley is out farther than the crank pulley. I tried a new backing plate but generator holes are not the same. The generator is not new. I did not note this when I started my project. I'm assuming that it was like that when I started. the only thing that has changed is a new Skat Crank. I measured that and it is the same as my old crank. pulleys are installed correctly as they can only go on one way. backing plate only goes on one way.. I am lost. anyone else had this problem???


Thanks

[Ed T]

More likely than not, the pulley halves on the generator or on backwards. pull them off, turn them around and see it that works. I had that issue when I bought my 912. Thought it was the wrong generator, etc. Easy fix.

Ed T

[Spendo65]

been there done that not the problem but thanks. Wishing it was that easy.

[Jaems]

Pictures can sometimes help with a problem.


Did the fan bolt on OK, and can turn freely without rubbing? Is the fan on backwards? Is the back of the generator flush with the Air/fan housing (dog House) front plate? Is the Dog house on correctly? Is it the right Generator?

Sometimes it is hard to diagnose a problem without seeing it.

[Spendo65]

Ok here are some photos. the first picture is before I took the engine apart for rebuild. the others are after the rebuild trying to complete it. it looks like it was this way before I started. the only thing I can come up with is the generator is wrong size. Hope you see what I don't see.

Thanks for the help.
Spencer

[Tony V]

Hi Spencer,
Just took a look at my '68 and the backing plate is on the other way. It's recessed into the dog house rather than the way yours looks in the last picture.
Tony

[Spendo65]

Yeah, I thought that was the problem too after looking at a 356.. I went and bought the different backing plate and the mounting holes are too narrow. I'm beginning to believe that I have the wrong generator. it is a GR15X. It measures 6 3/4 inches from front to back and 10 inches total end of bolt to end of bolt..

Thanks though

[Spendo65]

Tony I think you are right I have found out that the generator had been changed out sometime ago. Upgraded to a bigger generator. the backing plate is suppose to be for a 69 912. and we now believe that I have a VW back plate. Now I just need to find the right plate and I think my problem is solved.


thanks again
Spencer.

[jittsl]

I may have an old generator with the right part. I'll let you know tommorow.

[WFBowen]

The two generators use different mounting parts all of which "fit", but can result in the wrong clearances.
Some of the parts that are different are: Rear mounting nut (towards front of car); Carrier plate; Fan; cover plate and fan hub. I did a similar conversion a few years ago and laid out all of the parts from both cars, hoping to choose those in the best condition, when I realized just how different (even slightly) the setups are.
Here's a photo posted by member djdsc several years ago when we both posted on a similar situation.

[Jaems]

The early engines will have a smaller generator and a smaller generator stand. If the early Generator has been replaced with a larger one then the stand was probably replaced. You will have to stay with a larger generator, the one for the 69 912.

The first picture is a backing plate for a small generator. The second in a picture of a large generator.

[Spendo65]

WFBowen it is the picture on the right that I need. and to Jaems the bottom pic. Just found out that it is the 1969 set up that I am looking for. I can find a new back plate but I believe there are three pieces. anyone have a pic of the third piece. I have the small ring. I can get that part I have in the pic. And I know there is a paper gasket. Is the fan different and is the set up two or three pieces? I actually think I have the correct fan by looking at WF picture.

[WFBowen]

49 900.028.008.01 Spring Washer. B 6 DIN 137 bost.
50 900.075.010.02 Hexagon Srew M 6x12 DIN 933-8G
52 616.106.181.00 Nut for fan for generator 350 W
(52) 547.09.303 Nut for fan for generator 420 W
53 616.106.011.00 Fan for generator 350 W
(53) 616.106.023.00 Fan for generator 420 W
54 546.06.204 Cover plate for generator 350 W
(54) 616.106.337.00 Cover plate for generator 420 W
55 546.06.202 Washer
56 546.06.203 Carrier plate for generator 350 W
57 539.09.314 Washer
58 539.06.201 Hub for fan for generator 350 W
(58) 616.106.201.00 Hub for fan for generator 420 W
59 539.06.102 Reinforcement flange for generator 350 W
(59) 616.106.339.00 Reinforcement flange for fan cover for generator 350 W
616.106.115.00 Cover plate for generator 420 W
60 616.106.125.00 Distance ring
61 616.106.105.01 Cover for fan housing, generator 350 W
(61) 616.106.024.00 Cover for fan housing, generator 420 W

[jittsl]

Sorry. Can't help with that piece. Thought I may have a spare used generator but I know I don't have the fan system spare.

[Spendo65]

The number 61 is for the GR 26x generator 90 mm. Mine was converted some time ago to the larger GR15x larger diameter. I did find the back plate I think. Thanks for all the help we will some how get to the bottom of this problem.


Spencer

[Jaems]

#61 pictured is for the early small generator.