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34 Pict 3 Accelerator Pump Linkage
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mnussbau
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PostPosted: Thu May 29, 2008 5:46 pm    Post subject: 34 Pict 3 Accelerator Pump Linkage Reply with quote

Picked up a used OG 34 pict 3 carb for $5, rebuilt it, and got a new Bosch SVDA to go with it. The carb has the generator style accel pump linkage. I haven't tried to install it but am anticipating it will hit the alternator.

I have an H30/31 (with the low profile-type accel pump linkage) that this carb will replace. Any reason I can't pull that linkage and put it on the 34 pict 3? Is it a direct replacement? If possible I'd like to avoid grinding the alternator body.
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PostPosted: Fri May 30, 2008 7:05 pm    Post subject: Reply with quote

I dunno. The H30/31 fuel inj. pump link is probably engineered specifically for the fuel shot for that carb. I would get out my 4 1/2 in. grinder and carefully grind off a small amount at a time until the fuel inj. linkage does not interfere with the alt. casing. Problem will be solved.
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PostPosted: Fri May 30, 2008 7:07 pm    Post subject: Reply with quote

Or find the correct part.

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mnussbau
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PostPosted: Fri May 30, 2008 7:37 pm    Post subject: Reply with quote

I just now got a chance to look at the H30's linkage carefully. The attachment on the right side is not bolted on to the throttle shaft like the 34 pict's, instead it looks pressed on somehow. So I'd have to use the entire throttle shaft including the arm. Not sure I want to go mucking up an otherwise good carb. Confused

Glenn wrote:
Or find the correct part.

Yeah, I've done some looking, nothing so far. This might be a good excuse to buy that Dremel I've been putting off...
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PostPosted: Fri May 30, 2008 8:19 pm    Post subject: Re: 34 Pict 3 Accelerator Pump Linkage Reply with quote

mnussbau wrote:
Picked up a used OG 34 pict 3 carb for $5, rebuilt it, and got a new Bosch SVDA to go with it. The carb has the generator style accel pump linkage. I haven't tried to install it but am anticipating it will hit the alternator.

I have an H30/31 (with the low profile-type accel pump linkage) that this carb will replace. Any reason I can't pull that linkage and put it on the 34 pict 3? Is it a direct replacement? If possible I'd like to avoid grinding the alternator body.


i thought the 34 pict 3 accel pump linkage was able to be flipped to accomodate a generator or alternator... (as per Glenn's pic)

i think i have a 34 pict around here....
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DrDarby
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PostPosted: Fri May 30, 2008 8:24 pm    Post subject: Reply with quote

No, you cannot flip the linkage it is an entirely different beast.
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mnussbau
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PostPosted: Sun Jun 01, 2008 4:22 pm    Post subject: Reply with quote

Ok, so I installed the carb as is and ended up filing down the side of the alternator just a bit.
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PostPosted: Sun Jun 01, 2008 5:38 pm    Post subject: Reply with quote

cool. i love using my dremel.
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mnussbau
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PostPosted: Sun Jun 01, 2008 6:38 pm    Post subject: Reply with quote

I really thought this would be the job to prompt me to buy one, but alas, I found a "flat bastard" file in the basement. (Hey, wasn't he in an Austin Powers movie?!) Laughing
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PostPosted: Mon Jun 02, 2008 4:13 am    Post subject: Reply with quote

make sure that accel pump lever does not touch the alt. casing at all when the carb is mounted. I had to grind quite a little bit off of mine to get the clearance,.. maybe almost 1/4" deep. Verify that the lever has not been bent, set the adjustment setting in the middle, and go from there.
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gobeatle
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PostPosted: Sun Jul 27, 2008 11:35 pm    Post subject: Reply with quote

Can someone tell me how I might go about getting the correct linkage, shown in Glenn's post, if I have an alternator in the way of you 34-3 linkage. The alternator linkage setup doesn't seem very common.
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PostPosted: Mon Jul 28, 2008 7:13 am    Post subject: Reply with quote

Is it possable to file and notch the exsisting cam that hooks to the linkage to look and work like Glenn's post? I took it apart and it looks like it can be done that way. Is the correct linkage for an alternator setup shorter than what I have now. I really don't want to bend the cam to get it to go around the alternator.
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gregthomas
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PostPosted: Mon Jul 28, 2008 7:27 am    Post subject: Reply with quote

Isn't the linkage on an H30/31 adjustable. If so, I think you could use it and then adjust it for the correct shot for your carb.
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gobeatle
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PostPosted: Mon Jul 28, 2008 10:38 am    Post subject: Reply with quote

Okay, thanks, that's good information. I'm wondering also about the cam attached to the shaft. There must be a cam specific for the alternator application or can I find that on another carberator, like a 30/31. Thanks for your help.
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PostPosted: Mon Jul 28, 2008 7:42 pm    Post subject: Reply with quote

No. I dont think there is a cam you can put on your 34 pict 3 carb that will clear the alt. Get a diff. carb or start doing some judicious grinding. Shocked
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mnussbau
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PostPosted: Mon Jul 28, 2008 9:10 pm    Post subject: Reply with quote

gregthomas wrote:
Isn't the linkage on an H30/31 adjustable. If so, I think you could use it and then adjust it for the correct shot for your carb.

yes, that linkage is adjustable. It's just not movable onto the 34pict 3!
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PostPosted: Mon Jul 28, 2008 10:04 pm    Post subject: Reply with quote

Does everyone with an alternator and a 34-3 have their linkage and cam like what Glenn's pic shows. I took mine apart and couldn't get it to look like that. The cam had to be reversed and did not look like the photo. Did Solex make a spicific cam for an alternator 34-3 carb aplication?
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PostPosted: Mon Jul 28, 2008 10:46 pm    Post subject: Reply with quote

Gobeatle,
If it was an OE fitment, yes. VW changed the plates to suit. Since my car was originally generator equipped, I ground clearance into the alternator body.

I've done the same as you. Basically, you either pillage an alternator carby or fab your own. I found no-one (VW shops) that sold the plates seperately.

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PostPosted: Tue Jul 29, 2008 8:52 am    Post subject: Reply with quote

gobeatle wrote:
Does everyone with an alternator and a 34-3 have their linkage and cam like what Glenn's pic shows. I took mine apart and couldn't get it to look like that. The cam had to be reversed and did not look like the photo. Did Solex make a spicific cam for an alternator 34-3 carb aplication?



jzjames wrote:


No. I dont think there is a cam you can put on your 34 pict 3 carb that will clear the alt. Get a diff. carb or start doing some judicious grinding.


Yes there is a specific linkage made for alternator...

(And as Dr Darby noted in his post) Many look at that picture or diagram that Glenn and others have posted and think all you have to do is just "flip flop" the linkage parts over etc and that does not work, the parts are different. IF you flip it over the adjustment has to be moved all one direction and even then the linkage is not in position to "work properly".

I have a method where I take gen style linkage bits and cut one piece with hacksaw and then mig weld it back with the slotted end for the throttle shaft oriented correctly... one other minor mod to the threaded screw hole and wallah! ....Alt linkage. I do them in batches of about 8 or ten... With more and more people converting to alternators and original alt style linkage in short supply I had to figure something out Very Happy

Grinding the alt and some on the lock screw of the gen style can get the job done... but BENDING the linkage (like some people do) is not good IMHO|

H 30/31 accelerator pump parts are unique to that carb.
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gobeatle
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PostPosted: Tue Jul 29, 2008 9:12 am    Post subject: Reply with quote

Ah, thanks Keith, thought you would never jump in. So you copied the alt. linkage setup when you fabricated your? I think I need to get one of those from you. Thanks for the info.
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