Do you mind if I create this thread so that I keep all questions about my pending carb rebuild in one place?
First up, I have ordered the tools I will be needing, and these packages should be on their way to Old Jeep Carbs shipping address. They will have my name on them. Please keep a look out for them!
Second question, I have disassembled my candidate carb for rebuild. The throttle body has 458 cast into the body. Does that mean that I have a 596S? (I suspect so).
Third question.... If I do have a 596S, is the rebuild kit you have assembled for me, and the rebuilt throttle body, applicable to the 596S? I think I previously (erroneously) told you it was a 636SA.
Last question for now: The choke shaft on the candidate carb is quite worn and loose. I can feel the wear in the shaft with my fingers. Is this something that needs to be addressed, or is it acceptable to run a carb with a worn choke shaft?
Do you mind if I create this thread so that I keep all questions about my pending carb rebuild in one place? Be my welcome associate!
First up, I have ordered the tools I will be needing, and these packages should be on their way to Old Jeep Carbs shipping address. They will have my name on them. Please keep a look out for them! You know I will!
Second question, I have disassembled my candidate carb for rebuild. The throttle body has 458 cast into the body. Does that mean that I have a 596S? (I suspect so). Hmm. Yes and no. The 596S was used on the CJ2 Agrijeep. For a solid identification, I ask you to forward a few photos of the carb.
Third question.... If I do have a 596S, is the rebuild kit you have assembled for me, and the rebuilt throttle body, applicable to the 596S? I think I previously (erroneously) told you it was a 636SA. The rebuild kit is the same for both, however, there are significant differences in the linkage on the throttle.
Last question for now: The choke shaft on the candidate carb is quite worn and loose. I can feel the wear in the shaft with my fingers. Is this something that needs to be addressed, or is it acceptable to run a carb with a worn choke shaft? Is the shaft obviously worn down with a large worn area?
OK, so here is why I thought I had a 596S.... Reference to a 458 casting number on the "face of flange".
Here is a closer view of the disassembled throttle body. I-458 is clear in the casting:
This is what led me to believe that I had a 596S!
Now the throttle base, STAMPED numbers and markings.
There is a "N", a much fainter "2", and a very faint "505", double stamped which created a bit of a shadow (looks like the camera lost focus, but it's stamped like that). The 505 stamp only emerged last night after cleaning.
Now, CAST 458 vs STAMPED 505. What gives?
Here are some other pics of the linkages.
I'm pretty well confused between castings, stampings, 458's, 505's, 596s and 636s......
I've done some more digging and comparing photos. I see I have a 636S/SA! The language between 458 casting and 505 stamping confused me. But I'm all good now! Do you want to move this thread to the correct part of the forum?
I can't vouch for the accuracy of it, but it's pretty useful for identifying the minute differences between carb models. Or even if you think you have a carb salad, which part comes from which model carb!
I see the throttle shaft material for example is chromed brass. That's interesting. My worn choke shaft is bi-coloured silver and brass, and now I know why. Wondering now if this would help tighten up the choke shaft if I get it re-chromed to add some material back to replace that which has worn away....?
Anyway, I'm having fun cleaning everything and making good progress on this. I plan on getting the big bits and the linkages glass bead blasted. Is there any part I shouldn't bead blast? Should the bead blasting be external only, or can the underside of the bowl cover also be bead blasted, for example?
It warms my heart to see you discover more and enjoy yourself with it. The composition of the shaft is actually Nickel/Brass. I would not bother replating it because the wear is uneven along the length and getting the correct amount of plating will be difficult. But, if you want to experiment, be my guest. As to the chart, it and another are here; ID. From the photos, it is definitely a 636. You're on the right track. No tools yet.
Post by jeepsaffer on Sept 10, 2019 13:48:31 GMT -5
Thanks Scout. There should be a float level gauge and metering rod gauge in that package. You can open the package to confirm if you like, or to repack the tools with the rebuild kit, if you need to. An accelerator pump stroke gauge and rivet extractor tool are coming from another vendor, so I am expecting another package, yes.
I see that the nozzle, nozzle retainer and nozzle retainer gasket have different part numbers between the 636S and 636SA. Does this mean the rebuilt kits needs to be specified correctly in order to get the correct parts in the kit?
For what it's worth, the numbers stamped into these parts that I removed are legible and correspond to the 636SA. So that would be what i have then!
Post by Scoutpilot on Sept 10, 2019 14:57:38 GMT -5
By carefully removing the old parts and comparing them to the new parts, laying them out in the order they were removed, will help identify all parts. Do not throw away anything. You will see the differences in the nozzles and retainer gasket. Both nozzles and both retainers are in the kit. For further verification, shine a torch down the nozzle passage and note the final insertion slot.
oilleaker1: +2 this AM. Things are looking positive. Good Coffee.
Jan 16, 2020 7:03:50 GMT -5
Scoutpilot: The shop will be closed tomorrow. I have a funeral to attend.
Jan 16, 2020 16:05:22 GMT -5
Scoutpilot: Good night Y'all.
Jan 16, 2020 18:59:57 GMT -5
rickg: Mornin guys! Whoever put on the pot this morn done goood!
Jan 17, 2020 9:24:48 GMT -5
Scoutpilot: 30 on the back deck. Coffee's hot. Good morning Y'all.
Jan 18, 2020 5:33:22 GMT -5
64cj5: Up to 20* at 0835 and no wind.
Jan 18, 2020 10:36:06 GMT -5
Scoutpilot: Coffee's ready.
Jan 19, 2020 5:04:54 GMT -5
leemn: +5*, thanks for the cup 👍🏿
Jan 19, 2020 8:13:51 GMT -5
binthere: Thanks for the coffee, +79 and had to add rum to the cup.
Jan 19, 2020 9:44:23 GMT -5
Scoutpilot: I'm having problems with my eMail accounts. A couple of marketing bots have found a weak spot and I'm being bombarded with spam and junk. Contact me here if you need anything.
Jan 19, 2020 17:01:49 GMT -5
oilleaker1: Scout had the same. Google the name of the Bot and you can go in and delete it from your programs with the instructions.
Jan 19, 2020 17:35:06 GMT -5
Scoutpilot: In the morning gets.
Jan 19, 2020 19:24:31 GMT -5
Scoutpilot: 20 and dark off the back deck. Coffee's up. Good morning.
Jan 20, 2020 5:54:30 GMT -5
wkwillys: Good Morning. Saw your post about Bots, so I'm contacting you here instead of via e-amil.
Jan 20, 2020 6:55:13 GMT -5
wkwillys: I doing a full military resto on a 50 Willys M38; re-manufacturing the engine now. I'd like to have the carb freshly rebuilt by you if you do these. Carter YS, tag 637S G6, side draft with vent. Do you also rebuild fuel/vacuum pumps? Thanks. John
Jan 20, 2020 7:06:04 GMT -5
oilleaker1: WK, I've rebuilt two M38's and a M38A1. Scout is your carb guy for sure. They are difficult. (not a side draft carb) If you have a question, try me, I'll be glad to help, Oilly
Jan 20, 2020 7:22:55 GMT -5
Scoutpilot: It's full service around here. I'd be happy to help you.
Jan 20, 2020 11:58:15 GMT -5