Coulton Posted April 28 Share Posted April 28 1955 B-61 with a FA-505 axle. For a pre-1963 it came up as a Mack 301SQ32B kingpin kit which crossed over to a Euclid E-4465-B. When we pulled the original kingpins today they are longer than the new Euclid kingpins. Original are 7 5/16” in length and new ones are l 6 5/8”. The new kit came with roller bearings and my original kingpins were only bushings. Any suggestions on the proper kit#. Anyone have pics of a proper kit. Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/ Share on other sites More sharing options...
Coulton Posted April 28 Author Share Posted April 28 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550584 Share on other sites More sharing options...
The Heinz Posted April 29 Share Posted April 29 I am not well versed in old truck parts, but I was able to find some different crosses other than the Euclid kit. Found this TRW brand kit K506B, the size according to mpparts.com is 1.250" x 7.88" I'll attach a screenshot to see if it appears what you're looking for. Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550634 Share on other sites More sharing options...
mechohaulic Posted April 29 Share Posted April 29 picture you posted =K506B shows a straight pin . original picture posted of pin removed is the tapered pin ; big bottom /smaller top . picture #3 of needed kit would/should be correct . 11/16th difference in pin length possibly another sign of product cut back. look at the diagram picture posted you notice top of pin does nothing once past the roller bearing. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550641 Share on other sites More sharing options...
The Heinz Posted April 29 Share Posted April 29 1 hour ago, mechohaulic said: picture you posted =K506B shows a straight pin . original picture posted of pin removed is the tapered pin ; big bottom /smaller top . picture #3 of needed kit would/should be correct . 11/16th difference in pin length possibly another sign of product cut back. look at the diagram picture posted you notice top of pin does nothing once past the roller bearing. Yea, that's my bad for not looking as closely, sorry. I couldn't find any other good crosses, don't know where to suggest you find the right ones either. Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550643 Share on other sites More sharing options...
Popular Post mattb73lt Posted April 29 Popular Post Share Posted April 29 If you strike out finding the correct kit and everything else in the kit you just got will work, you could have the kingpins made at a machine shop and then heat treated. Sometimes it is the best way to get it back on the road if there are no other options. 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550653 Share on other sites More sharing options...
Joey Mack Posted April 30 Share Posted April 30 did you measure the length of the new pin and the overall length of the steering knuckle's king pin boss'? are they the same? i'm just curious.. Matt makes a good point as well.. Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550657 Share on other sites More sharing options...
Draggin Wagon Posted April 30 Share Posted April 30 Last correct kit I had was a Moog 8482B. Good luck finding 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550663 Share on other sites More sharing options...
mechohaulic Posted April 30 Share Posted April 30 2 hours ago, mattb73lt said: If you strike out finding the correct kit and everything else in the kit you just got will work, you could have the kingpins made at a machine shop and then heat treated. Sometimes it is the best way to get it back on the road if there are no other options. another option to consider = is this a hobby/show truck ?:: are the diameters top and bottom of new pin correct with only length tad short , install bush, bearing, pin check top of spindle with top cap off, does the pin protrude past upper bearing ;;; I say go for it. are the original king pins that bad after a fluff and buff installed with the new bearing/bushing to where it would be a safety hazard driving?? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550670 Share on other sites More sharing options...
terry Posted April 30 Share Posted April 30 (edited) 11 hours ago, mechohaulic said: another option to consider = is this a hobby/show truck ?:: are the diameters top and bottom of new pin correct with only length tad short , install bush, bearing, pin check top of spindle with top cap off, does the pin protrude past upper bearing ;;; I say go for it. are the original king pins that bad after a fluff and buff installed with the new bearing/bushing to where it would be a safety hazard driving?? Them new pins are not tapered, no way to fit unless you do some lathe turning on them. terry Look like rockwell pins, there is a notch in the middle where a retaining pin goes through axle and along side of pin to lock it in. Edited April 30 by terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550703 Share on other sites More sharing options...
mechohaulic Posted April 30 Share Posted April 30 BUT look at picture #1 the original pin VS pin kit they have . the pins are BOTH tapered ; new pin tad shorter which looking at diagram cut away the pins go above bearing . the picture #4 is a pin kit photo supplied by BMT member NOT a correct kit for B model. straight pin having a tapered lock bolt is for much later axle. the tapered king pin should memory be correct is held from spinning in axle by weight on the taper of center section on pin. earlier tapered pin kits had the thicker bushing which required a reamer. Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550772 Share on other sites More sharing options...
mechohaulic Posted April 30 Share Posted April 30 9 hours ago, terry said: Them new pins are not tapered, no way to fit unless you do some lathe turning on them. terry Look like rockwell pins, there is a notch in the middle where a retaining pin goes through axle and along side of pin to lock it in. the later straight pin kits have the larger bearing on bottom between spindle and axle which take the unit weight. reason for tapered lock pin through axle and king pin, 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550774 Share on other sites More sharing options...
Joey Mack Posted April 30 Share Posted April 30 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550775 Share on other sites More sharing options...
mechohaulic Posted April 30 Share Posted April 30 excellent page of reference ; I'm not sure they are all Mack axles although it is in a Mack manual ;; also considering fact I know I didn't work on or remember working on every one.!!. remember the king pin having a threaded top for adjustment (way back ).FA600 series Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550778 Share on other sites More sharing options...
Joey Mack Posted April 30 Share Posted April 30 I have 3 of these,, one is near perfect.. Look close,, its a B-61 book 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550779 Share on other sites More sharing options...
mechohaulic Posted April 30 Share Posted April 30 even looking at the Mack logo and stance of the bulldog on service manual says ; Mack is a worker. rugged and bold. once again a regret of " how would I have known to save and keep all those books and manuals I HAD. Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550781 Share on other sites More sharing options...
Joey Mack Posted April 30 Share Posted April 30 My Dad bought a 6 unit building in Biddeford Maine 20+ years ago. He was cleaning out a smal storage room and said, Hey Joe, I found some old truck books.. I was working at a Mack Dealershiip at the time, ( Maine Mack in Portlad Maine) really in Westbrook.. He didnt know what they meant to me, just that he didnt want to toss them in the trash.. there was about 6 books in total.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550782 Share on other sites More sharing options...
Coulton Posted May 1 Author Share Posted May 1 My kingpin is in tough shape, it needs replaced, so no buffing it Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550801 Share on other sites More sharing options...
Coulton Posted May 1 Author Share Posted May 1 I have the Type III steering knuckle without needle bearing. Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550802 Share on other sites More sharing options...
mechohaulic Posted May 1 Share Posted May 1 unfortunately , looks as though your back to "square one" . kit you purchased can't be used . steering system isn't anything to modify . based on picture of original pin, the ugly pitted section fits the axle. not major issue IF THEY HAD TO BE REUSED . bushing ends aren't totally a loss. still need correct bushing . entire proper kit. Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550828 Share on other sites More sharing options...
mowerman Posted May 1 Share Posted May 1 That screenshot looks like the ones I replaced in my62 F model Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-550835 Share on other sites More sharing options...
HarryS Posted October 18 Share Posted October 18 Checking back to see if Coulton was able to solve his king pin problem. I've got the same problem. I was able to find the right replacement pin with lower bushing but the upper pin has a needle bearing and the OD is too large for the knuckle. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-560322 Share on other sites More sharing options...
Vladislav Posted October 20 Share Posted October 20 On 10/18/2024 at 8:19 PM, HarryS said: Checking back to see if Coulton was able to solve his king pin problem. I've got the same problem. I was able to find the right replacement pin with lower bushing but the upper pin has a needle bearing and the OD is too large for the knuckle. Custom made brass bushing in place of the bearing? Doesn't seem as a big trouble. Only if the pin top OD is not larger than the knuckle hole. 1 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-560398 Share on other sites More sharing options...
HarryS Posted October 21 Share Posted October 21 That is plan B. If the parts store can't find the bushings I'll have them made. I spoke to a machine shop that makes a lot of parts for antique cars and he has made them before. Just needs the specs. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74098-fa505-kingpins/#findComment-560452 Share on other sites More sharing options...
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