skydawg Posted August 17, 2023 Share Posted August 17, 2023 With either front tire jacked off the ground,I get about an inch and a half of movement when I grab the tire at the top and push and pull.This occurs equally w/ left and right tires.I`m guessing this isn`t good,even though the front end feels solid going down the road...no shimmying or wobbling up to 50 mph,which is as fast as I`ve gone,so far.This is a 1961 B61 w/ an FA505 axle.Can anyone help in diagnosing the problem? Thanks. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 King pin bushings ? 1 Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 Either wheel bearing adjustment or kink pin wear. Here is the most likely Mack part number for a king pin and bushing set: 301SQ32B FA500/501/505 (Prior to 1963) 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
skydawg Posted August 17, 2023 Author Share Posted August 17, 2023 Are the sets still available? Who would be a good supplier to contact? Thanks. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 Keyser may have a kit for it.. I have seen several B-Model axles repaired at a Mack dealer up to about 4 years ago. I need to find a set for My '48 Int. as well. Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 I doubt the Mack parts will be available. But, Like JoJo says, there are aftermarket suppliers who can use the factory part numbers. I think mine were Stemco-Kaiser. Here is a clip from an old service kit list. Looks like Mack had discontinued these even back then. Might try reading this link... 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 Looks like the Stemco-Kaiser K534M may be discontinued, too. Maybe E4465B Euclid? Some possibilities... https://www.ebay.com/itm/266236271524 https://instockmotorsports.com/mack-301sq32b-king-pin-kit-nos/ Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 I'm sittin here thinkin about the last king pin job I did. It was over 2 years ago. It was for an '86 Super liner. I got the kit from Mack.. After reading back a few posts on this, it seems to me that in the short time I have been out of the truck repair business, everyday parts are quickly becoming hard to find or diss-continued. Now I wish I was a 'machinist' with a fully equipped shop. 1 Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 When I did my FA535 axle kingpins, it seemed like there were a half dozen sources for the kit. But, especially on these older trucks, I am seeing more and more stuff disappear. Gotta be the Volvo influence! Mack EXPECTED their trucks to last forever, and they tried to support them with parts so they COULD last forever. Not the case in this throw-away world. If it's more than 10 years old, "we gotta get rid of it". Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 You speak the truth DCW.. It bothers me that something I am very proud of, is easily dissolved. Hopefully we can help him figure out, and fix his issue.. Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 5 minutes ago, Joey Mack said: You speak the truth DCW.. It bothers me that something I am very proud of, is easily dissolved. Hopefully we can help him figure out, and fix his issue.. There have been several discussions on here in the past related to the early B model kingpin sets. Maybe some of those threads will yield a good part number. Or, the eBay link I posted? Maybe this is another one of those things Barry and Company should look into. If they could find someone to make new kits, there just might be a market. Just look at the names in the B-model registry! Barry...you listenin'? 1 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 Oh, but let's be sure to check the wheel bearing adjustment before starting on a kingpin job! 2 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 I've been looking at several cross references. But, some of them circle back around to a different Mack part number when you cross reference them "the other direction" or through multiple suppliers. I always feel better when that trip leads back to the same Mack number. Wow. I'm not sure that even made sense to me! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 Now my Head is Hurting.. Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 Personally, if the axle number and year matches up, I'd jump all over this one. NOS Mack parts. Or, maybe somebody could buy this one to use as a pattern for the new ones. If I had them, I could probably do drawings for them. And loo! There are 2 sets available! Maybe I should buy them as an investment! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 2 minutes ago, Joey Mack said: Now my Head is Hurting.. Serves you right!😄 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 (edited) I keep running into part numbers that are cross references for the 301SQ32B which also cross back over to the 301SQ45A. Any chance the 45A would fit the 32B applications? I kinda have my doubts. But... Anyway, here's something to think on. Edited August 17, 2023 by doubleclutchinweasel Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 I guess I need to take it from the top and go slow..... Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 2 minutes ago, Joey Mack said: I guess I need to take it from the top and go slow..... 😄😄😄😄😄😄 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 (edited) https://emtsparts.com/product/king-pin-kit-for-fa400fa401fa500-1962-earlier-fa501-1963-earlierfa505-1962-earlier-fa511-1962-earlier/ or https://parts.nwtruck.com/catalog/search/301sq32b?partno=SQ-301SQ32B maybe Edited August 17, 2023 by doubleclutchinweasel Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 I am leaning towards worn king pin bushings, he said both sides are sloppy. I hope these pics from a B-61 book I have helps, along with the great info DCW has posted.. Jojo Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 Looking at your post reminds me of when I did mine and had to set that nut under the thrust bearing. What a killer setup these things had. I hope his "early" axle has the same setup with the tapered pins and the thrust bearing. 2 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
skydawg Posted August 17, 2023 Author Share Posted August 17, 2023 Ok,I just bought the 301SQ32B Mack OEM set on ebay,should fit my pre`62 FA505 axle(I hope).I`ll have to find a shop to install them next.Many thanks to everyone,you guys are the best! 1 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 Skydawg,, Take a close look at the pictures I posted. the second one has specs that may be useful to the machine shop, when it comes to fitting the pins into the new bushings. I can e-mail them to you so you can print them. just post or P.M. your e-mail.. Jojo Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted August 17, 2023 Share Posted August 17, 2023 I’ll bet you could do them yourself. But I understand letting someone else do it. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
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