Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Mechanical & Electrical

SFT Search:   
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 09-10-2019, 09:43 PM
JBFab JBFab is offline
Elite Member
Join Date: Oct 2006
Location: NorthCentral Wisconsin
Posts: 1,373
Default New Holland TN70A - front axle fun

My good friend and neighbor across the section called and said one of his front tires was locked up on his tractor. I went over to help tear it down and drink his beer . After a bit of surgery we finally got it apart.

Picture 1 - a break down of the left side axle/knuckle assembly.

Picture 2 - a further breakdown of the cap and planet gear assembly from picture 1.

Picture 3 - the good (RH) side - disassembled this side because we couldn't get the bad (LH) cap off.

Picture 4 - the left hand side cap and planet gear assembly. Note the extra groove worn in the center from all the extra parts rattling around inside.

Picture 5 the outer end of the bad (LH) shaft.

To get the damn thing apart, we removed the entire knuckle assembly splitting it at the CV joint. Next we mounted it in my drill press with a hole saw and cut an access hole in the center of the cap. This gave us access to confirm what we thought all along. The splines of the axle that stuck through the planet gears had a burr on them that wouldn't allow the shaft (sun gear in this case) to slide out of the planet gears (even with a fair amount of force applied). Finally, with a second, smaller hole saw I cut the teeth that were protruding through the planets and pulled the shaft free.

I did a little bit of googling, and I'm going to estimate a good $1500 or so in parts to get this back together. I called a scrapper in OR about getting a used assembly and he wanted $1500 plus shipping for the assembly. Doesn't sound like much of a deal. The castings are in good shape, the shaft and planets are shot, the cap could be made to work, but it's only $200 - not hardly worth messing with. I think the ring gear is fine (weird) but if it's not more than a couple hundred I told him we may as well replace it too.

Tractor will be for sale in a few years if anyone is interested! lol.
Attached Thumbnails
Click image for larger version

Name:	20190908_134454.jpg
Views:	82
Size:	188.3 KB
ID:	152168   Click image for larger version

Name:	20190908_134500.jpg
Views:	79
Size:	190.8 KB
ID:	152167   Click image for larger version

Name:	20190908_134503.jpg
Views:	78
Size:	200.9 KB
ID:	152166   Click image for larger version

Name:	440396GIF.gif
Views:	59
Size:	37.8 KB
ID:	152164   Click image for larger version

Name:	440400GIF.gif
Views:	58
Size:	19.3 KB
ID:	152165  

I believe the appropriate metaphor here involves a river of excrement and a Native American water vessel without any means of propulsion.

Last edited by JBFab; 09-10-2019 at 09:58 PM.
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 03:04 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.