Full Floater Posted September 27, 2023 Share Posted September 27, 2023 About to install these sassy new front springs in my 75 R model. I have never messed with Mack front springs before, and im curious about these threaded spring pins. What is the best method to remove them? Is there to tool to fit over the slot or can I put a wrench on it to spin them? Also, what are the pros and cons of threaded pins? Many thanks Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/ Share on other sites More sharing options...
Joey Mack Posted September 27, 2023 Share Posted September 27, 2023 My experience has always been easy. Just un-screw the old ones with a wrench.. since they are probably worn out, they should be loose anyway.. the front pins should be smooth. once the front end is supported, you remove the shackles, then un screw the pins.. You got this.. Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539362 Share on other sites More sharing options...
Geoff Weeks Posted September 27, 2023 Share Posted September 27, 2023 Yep, they are easy to get out. Often when the pin is worn out so is the bushing. Since the ones in the springs are new, those should be fine. The fixed one on the frame may need to be replaced. IHC used threaded in all positions, others may not. Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539363 Share on other sites More sharing options...
Full Floater Posted September 27, 2023 Author Share Posted September 27, 2023 Nice, that's good news. 20 minutes ago, Joey Mack said: My experience has always been easy. Just un-screw the old ones with a wrench.. since they are probably worn out, they should be loose anyway.. the front pins should be smooth. once the front end is supported, you remove the shackles, then un screw the pins.. You got this.. Ah ok, didn't realize the shackles have to come off also. But that makes sense. Thanks fellas Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539364 Share on other sites More sharing options...
Popular Post Full Floater Posted October 1, 2023 Author Popular Post Share Posted October 1, 2023 Got them done! Went smoother then I expected. Thanks guys. They should be good for another 50 years now. 4 Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539529 Share on other sites More sharing options...
Geoff Weeks Posted October 1, 2023 Share Posted October 1, 2023 On 9/27/2023 at 4:51 PM, Full Floater said: Also, what are the pros and cons of threaded pins? Many thanks Supposedly the pro's of threaded pins is it increases the surface area and grease contained. I never liked them myself. Plain pin in a bronze bushing, replace when worn is my choice. Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539545 Share on other sites More sharing options...
Joey Mack Posted October 1, 2023 Share Posted October 1, 2023 one Pro. is that the threaded spring pins dont shift side to side, when worn.. pins and smooth bushings are really good too, hell they have been around forever.. Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539548 Share on other sites More sharing options...
Geoff Weeks Posted October 1, 2023 Share Posted October 1, 2023 Depends on how worn! 😄 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539552 Share on other sites More sharing options...
Joey Mack Posted October 1, 2023 Share Posted October 1, 2023 For sure... I'd hate to be in a dump truck when they are that worn.. Just sayin.... Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539555 Share on other sites More sharing options...
Full Floater Posted October 2, 2023 Author Share Posted October 2, 2023 In applications where there is not enough room to swing a hammer or something to drive an old pin out, I can see the threaded pins coming out ahead in the serviceability standpoint 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539593 Share on other sites More sharing options...
Joey Mack Posted October 2, 2023 Share Posted October 2, 2023 Yes.. I have had to remove the rear hanger before, in order to replace the bushing.. it can be several hours of work, due to battery boxes and mud flap mounts, and so-on.. Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539599 Share on other sites More sharing options...
Geoff Weeks Posted October 2, 2023 Share Posted October 2, 2023 3 hours ago, Joey Mack said: Yes.. I have had to remove the rear hanger before, in order to replace the bushing.. it can be several hours of work, due to battery boxes and mud flap mounts, and so-on.. Yeah, but a threaded pin does nothing to help remove the bushing, hanger still has to come out to replace the bushing if you don't have access. Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539609 Share on other sites More sharing options...
Joey Mack Posted October 2, 2023 Share Posted October 2, 2023 Yep.. I have checked d the new pin inside the old bushing for fitment. On rare occasions I had to leave them alone.. not the best procedure .. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73361-threaded-spring-pins/#findComment-539611 Share on other sites More sharing options...
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