TheSamba.com :: View topic - 34 PICT 3 Throttle Shaft/Bushing Question

Sun Feb 03, 2019 11:20 am

I bought a used Solex 34 PICT 3 carb for my 74 Std (PN 113129031K). I have it in pieces right now working on cleaning all the bits on the ultrasonic cleaner I just got.

I have read about the issues with the throttle shaft bushings leaking gas and letting air in under vacuum. I was able to get the throttle shaft out but what I have looks different to the other pictures I have seen on the forum/internet. My carb only has one plastic split bushing instead of two. The right side of the carb has the split bushing but the left side has a brass one that is part of the throttle lever mechanism.

The carb has two levers which I believe means it would allow a throttle positioner to be installed. That said, the carb came with the dashpot which does not use that lever anyways. The *fast idle* is the one that has the brass bushing for the throttle shaft.

Question: With this type of carb would I only need to replace the one plastic bushing? Also looking for recomendations on where to buy the bushing(s). I read that some of the eBay ones can be hit or miss.

Sun Feb 03, 2019 2:02 pm

Email Tim at volkzbitz.com

I don't know if he sells the bushing by themselves or not. I simply sent him my lower main body and had him install new bushing in my German 34-3 carb body. I then rebuilt/restored it when I got the parts back.

Best $ I could spend.

Mon Feb 04, 2019 3:39 pm

wcfvw69 wrote: Email Tim at volkzbitz.com

I don't know if he sells the bushing by themselves or not. I simply sent him my lower main body and had him install new bushing in my German 34-3 carb body. I then rebuilt/restored it when I got the parts back.

Best $ I could spend.

Thanks, I sent him an email to see if he sells them by themselves.

I also found another type of bearing in the MacMaster-Carr website that might work for this application (10mm OD / 8m ID). They are split bearings similar to the plastic one I found in the carb. This one has a steel casing with a Teflon insert backed by bronze. Saw a few of these on eBay as well for the 34 PICT 3. PTFE is Teflon - material compatibility with gasoline is not a problem. It is 10mm wide same as the original plastic one.

Mon Feb 04, 2019 4:08 pm

Be advised that bushing installation requires proper step drills & reamers ......
e-square12 wrote: I also found another type of bearing in the MacMaster-Carr website that might work for this application (10mm OD / 8m ID).

Mon Feb 04, 2019 4:28 pm

FeelthySanchez wrote: Be advised that bushing installation requires proper step drills & reamers ......
e-square12 wrote: I also found another type of bearing in the MacMaster-Carr website that might work for this application (10mm OD / 8m ID).

Understood, thanks for the info. Based on the ID side of my carb I should be able to use a 10mm reamer for the bushing above.

Just waiting to see if anybody has any feedback on the left side busing that does not seem to be replaceable.

Sun Feb 10, 2019 3:50 pm

The bushings were a bit oversized on the steel casing. Since I bought two I tried sanding the casing of the first one on a drill but soon realized that wouldn't work. It required too much material to be removed.

The ID in the carb was big enough to go directly with a reamer. I bought a 10mm reamer and with a slow and steady pass managed to get the carb opening to the right size for the bearing to fit in. It was a snug fit with a nice press near the end. Shaft slides freely with no play whatsoever. Since the brass bushing on the other side was still good I decided to leave it as is. Final verdict will come after I finish rebuilding the carb and get in installed on the engine.

Mon Feb 11, 2019 11:13 pm

Nice work! All sounds well so far.

Now please advise us how warped the carb base flange is ...... does it rock at all when setting on a flat surface, like window glass?

Tue Feb 12, 2019 2:02 pm

FeelthySanchez wrote: Nice work! All sounds well so far.

Now please advise us how warped the carb base flange is ...... does it rock at all when setting on a flat surface, like window glass?

I need to clean the flange as it still has some residue from the gasket it had. As is, it does sit flat on a piece of plexiglass I have laying around. I am planning on sanding the mating surfaces a bit to make sure they are all flat. Already did the same to the intake flange from when I cleaned the H30/31 that came with the car.

Tue Feb 12, 2019 7:12 pm

Pay attention the the mating flanges on the accelerator pump cover and where the cover lays against the body. Both surfaces on my German Solex 34-3 were warped a bit. I flattened them on level glass and it's perfect now.

Sat Feb 23, 2019 5:41 pm

Finally got some time to work on the carb rebuild. Just need to add green thread locker to secure the butterfly bolts and it is done.

Before...

After... :D

:?: Question: Is it ok to use blue Loctite on the two mounting studs?

Sat Feb 23, 2019 6:49 pm

That looks nice. Looks like Volksbiz finished product. Now let us know how it runs.

Sat Feb 23, 2019 7:05 pm

e-square12 wrote: :?: Question: Is it ok to use blue Loctite on the two mounting studs?

Yes, OK; but lock washers will be plenty, that's up to you.

Loctite was a sister company of my employer, and their products were high quality, as are Permatex.

Sun Apr 21, 2019 6:21 pm

Got to drive the car around the block a few times today. I'll get some help to fine tune the idle later but with the basic setup instructions I got the 34 PICT 3 running ok. Tried some carb cleaner around the new bushing and there was no change in the RPMs. As I get some miles on the car this summer I'll keep an eye on it and report back.

If all goes well I'll post a summary of the tools and steps I took to use this type of bushing.