John Deere 450B idler spring Installation Help

Post support questions about your JD350 and newer crawler here
Post Reply
Jstas450b
MC crawler
MC crawler
Posts: 5
Joined: Tue Dec 15, 2015 6:44 pm
Location: Odessa, NY

John Deere 450B idler spring Installation Help

Post by Jstas450b » Sat Sep 17, 2016 6:03 pm

So I was able to get to the point of having the spring compressed on my press and installed the all rod in to hold it. The problem that I am facing is once inside the frame, how do you hold the end of the of the spring end at the back of the arm well enough to be able to back the all rod? Any help that would be shared would be great.

In addition a 20 ton press works great to compress the assembly safely. The all rod also hold very well also. Just seems the holding it in place seems to be the main issue I have encountered to be able to keep it aligned in the rear boss and remove the rod.

Thank you in advance,
John


1974 John Deere 450B, six way blade and full forestry roll over and exhaust

User avatar
77 Ford
1010 crawler
1010 crawler
Posts: 477
Joined: Tue Nov 22, 2011 7:52 pm
Location: Missouri

Post by 77 Ford » Mon Sep 19, 2016 6:53 am

I used a long crowbar to wedge the end of the spring up into the frame and a 3/4" impact to unscrew the rod. I had to stop several times and make adjustments to get back into the correct place as it was getting tight.
JD- 450C track loader
Serial #208336T

Jstas450b
MC crawler
MC crawler
Posts: 5
Joined: Tue Dec 15, 2015 6:44 pm
Location: Odessa, NY

Post by Jstas450b » Wed Sep 21, 2016 11:12 am

Great. That's what I was thinking I would have to do next.

Thanks,
John

bennyt
430 crawler
430 crawler
Posts: 51
Joined: Thu Feb 11, 2016 11:58 pm
Location: Soso, Ms 39480

Re: John Deere 450B idler spring Installation Help

Post by bennyt » Wed Jul 05, 2017 4:25 pm

What size allthred rod did you use?

User avatar
77 Ford
1010 crawler
1010 crawler
Posts: 477
Joined: Tue Nov 22, 2011 7:52 pm
Location: Missouri

Re: John Deere 450B idler spring Installation Help

Post by 77 Ford » Thu Jul 06, 2017 6:42 am

It's been a long time but if memory serves me right, it's 1". The "end cap" so to speak of the spring assembly is threaded. I had to purchase a tap to clean my threads out to get mine to thread in correctly.
JD- 450C track loader
Serial #208336T

bennyt
430 crawler
430 crawler
Posts: 51
Joined: Thu Feb 11, 2016 11:58 pm
Location: Soso, Ms 39480

Re: John Deere 450B idler spring Installation Help

Post by bennyt » Sun Jul 09, 2017 9:54 pm

Thanks, my end caps are rusted inside to the point the threads are all but gone. I was thing of taking them to a machine shop to see if they can be repaired. Any thoughts on this?

User avatar
77 Ford
1010 crawler
1010 crawler
Posts: 477
Joined: Tue Nov 22, 2011 7:52 pm
Location: Missouri

Re: John Deere 450B idler spring Installation Help

Post by 77 Ford » Mon Jul 10, 2017 7:02 am

I thought the same thing but once I ran a tap thru mine they cleaned up pretty good. If you've not done it yet, I'd take a sand blaster to the cap to really determine the shape of the threads. They might surprise you, 1" threads have very wide turns.


A good machine shop can do miracles, I had one rebuild a main shaft rotor for my wood chipper for 1/2 the cost of a new one and I honestly think it was better than new once he was done with it (he machined it to a much tighter tolerance). I would not hesitate to let my machine shop rebuild my end cap but I guess it determines how much faith you have in yours.
JD- 450C track loader
Serial #208336T

Post Reply

Who is online

Users browsing this forum: No registered users and 65 guests