atk_man
Member
On a '79 B7100D, should the yokes on the front driveshaft (4WD from the tranny to front diff) be in phase? Or should they be 90 deg offset?
Anybody know?
Anybody know?
4WD driveshaft.
- Thread starter atk_man
- Start date
- Views: 2421
frank_f15
Super Member, Rest in Peace
sorry can't help u on this one. with any luck KUBMECH will see this post. i am sure he would know.
I have always been told that the fixed yokes (those attached to the driveshaft) should be in the same plane whether is be on a vehicle or PTO shaft. I am told that this prevent the two ends of the shaft from trying to turn at different speeds which, I guess, is why CV joints were invented.
I am no engineer, but have been told this by farmers and mechanics all my life.
I am no engineer, but have been told this by farmers and mechanics all my life.
Anonymous Poster
Epic Contributor
- Joined
- Sep 27, 2005
- Messages
- 29,678
HI,
I had my B2910 back for warrenty replacement of the plastic front driveshaft cover.
Was talking to the mechanic and he told me that when you take the front driveshaft off, you mark it first, and put it back the same way. Otherwise, according to him, it will fail prematurely.
Don't know myself, but that is what someone that should know said.
For what it's worth...
Bill in Pgh, PA
I had my B2910 back for warrenty replacement of the plastic front driveshaft cover.
Was talking to the mechanic and he told me that when you take the front driveshaft off, you mark it first, and put it back the same way. Otherwise, according to him, it will fail prematurely.
Don't know myself, but that is what someone that should know said.
For what it's worth...
Bill in Pgh, PA
skent
Platinum Member
In Phase. . . . Same as the driveshaft on your PTO or on your car. . . .
JohnMiller3
Elite Member
- Joined
- Jan 15, 2001
- Messages
- 2,517
- Location
- Capital District, Upstate New York
- Tractor
- Satoh S650G, MF135, MF165, JD5205
<font color=blue>… should the yokes on the front driveshaft (4WD from the tranny to front diff) be in phase?...</font color=blue>
If I understand you correctly… on a drive shaft/pto shaft… both the front and rear u-joints or yoke assemblies should be aligned/in-phase/in-sync with each other to keep the “shaft assembly” balanced… (obviously the shaft by itself should have been balanced by the OEM)…
When you change a u-joint or entire yoke assembly at one end or the other… the replacement should be the same as the original (in-phase)…
When the shaft is out-of-phase... this usually causes an "unbalanced" situation and vibration starts... very popular with inexperienced implement hookups... (split PTO driveshaft not assembled properly)...
If I understand you correctly… on a drive shaft/pto shaft… both the front and rear u-joints or yoke assemblies should be aligned/in-phase/in-sync with each other to keep the “shaft assembly” balanced… (obviously the shaft by itself should have been balanced by the OEM)…
When you change a u-joint or entire yoke assembly at one end or the other… the replacement should be the same as the original (in-phase)…
When the shaft is out-of-phase... this usually causes an "unbalanced" situation and vibration starts... very popular with inexperienced implement hookups... (split PTO driveshaft not assembled properly)...
MikePA
Super Moderator
<font color=blue>(split PTO driveshaft not assembled properly)... </font color=blue>
This is why I am glad someone painted a white stripe on both ends of my mmm driveshaft. /w3tcompact/icons/smile.gif
This is why I am glad someone painted a white stripe on both ends of my mmm driveshaft. /w3tcompact/icons/smile.gif
All the kubota shafts I can think of have a "tabbed" spline and or roll pin to prevent you from making this mistake. The white paint just makes it easier to line up the "tab". Most Pto shafts (for rear mounted mowers, tillers etc.)are set up with a way to ensure proper alighnment as well. Thats why the slip shaft is rectangular or "goofy" shaped.