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crvc
Samba Member
Joined: April 28, 2004
Posts: 1308
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 Posted: Mon Jul 21, 2014 2:20 pm Post subject: Mounting new fan |
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This is for a doghouse fan.
So I got the new 35mm fan to go along with the new hub. The kit came with the hub, two spring washers and a new nut. I don't know why I need two washers. Online videos show him putting one flat washer on the hub, then the fan, then the spring washer then the nut. Any ideas? Do I 'sandwich' the two washers between the fan then put it all on the hub?
thanks,
crvc |
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Her74buggy
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Joined: September 29, 2013
Posts: 367
Location: Houston
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| Posted: Mon Jul 21, 2014 2:34 pm Post subject: |
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Are you talking about the main fan off the gen/alt that mounts to the fan shroud? It's something aftermarket if you are mounting it to the dog house.
If it's the former I would invest in a manual rather than trusting utube videos.
I can take a picture of the schematic in the manual if that helps. A lot of times you will see when you take apart the original you are replacing though, as long as it hasn't been hacked. |
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crvc
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Joined: April 28, 2004
Posts: 1308
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| Posted: Mon Jul 21, 2014 3:14 pm Post subject: |
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No, it's the 35mm fan for a 1974 engine. The fan sends air to the oil cooler through the doghouse. I just talked to the shop owner. He said don't use both spring washers. Put a flat washer on the hub, then the fan, then a spring washer then the nut. I guess the second washer is an extra.
crvc |
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mukluk
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Joined: October 18, 2012
Posts: 7028
Location: Clyde, TX
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| Posted: Mon Jul 21, 2014 4:22 pm Post subject: |
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The flat washers placed between the hub and the fan are used to adjust the gap between the fan and backing plate... one may be enough, might need two, might need three, gotta measure the gap to be sure. The gap should be about 2mm (needn't be precise). You really shouldn't need two of the thick spring washers, not really sure there'd be enough room on the hub to fit them both.
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1960 Ragtop w/Semaphores "Inga" |
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flyboat
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Joined: April 21, 2010
Posts: 2752
Location: Bath NC
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| Posted: Mon Jul 21, 2014 6:55 pm Post subject: |
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| mukluk wrote: |
| The flat washers placed between the hub and the fan are used to adjust the gap between the fan and backing plate... one may be enough, might need two, might need three, gotta measure the gap to be sure. The gap should be about 2mm (needn't be precise). You really shouldn't need two of the thick spring washers, not really sure there'd be enough room on the hub to fit them both. |
Ditto
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62 Ragtop Bug
66 tintop Westy
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09 Z06 Vette track car |
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crvc
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Joined: April 28, 2004
Posts: 1308
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| Posted: Wed Jul 23, 2014 7:26 am Post subject: |
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I tried adding shims one-at-a-time but ran out of shims and knew I'd need some for adjusting the fan belt tension.
I ended up using both of the heavy spring washers. One was flatter than the other. I put that one on the hub first, then the fan, then the second washer then the nut. Before that I'd tried adding shims one-at-a-time but ran out of shims and knew I'd need some for adjusting the fan belt tension.
I found the whole reason for the problem was I forgot one of the three studs that the oil cooler attaches to. With only two studs securing it the cooler was at an angle which sorta bent the shroud. The shroud at an angle prevented the four 10mm nuts from securing the large plate that attaches the generator to the shroud. The warped shroud caused the fan to rub at the bottom where the cooling vent is.
crvc |
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