B7100 PTO grinds when engaging lift lever, if tractor running

[Temblor]

1st time attaching a woods mower on a Late 70s early 80s kubota Gear driven B7100.
When I attempt to engage the lever to raise mower attachment while tractor is running it will grind loud.
I know the lift works, if I shut OFF the tractor, engage the lever to lift position and restart the tractor, the mower will lift!
Is this some type of safety feature? Or should the lever engage while tractor is running without grinding?
Am I doing something wrong?


Does anybody have a picture of your 3 point attachment properly hooked up to a mower so I can see if I have mine mounted correctly?

2. Also I have a Leinbach Post Hole Digger 7300 auger (which is the bigger model) does anyone know if this will work on a B7100? I think I need the 7200 jr model.. but wondering if it is worth trying?

3. The hydraulic fluid in my tractor is a pinkish color. Is this bad?
I do not know what type of fluid was in the machine before, but I am using Napa Hydraulic Fluid which lists as "Kubota UDT" compatible on the back label.
The Napa Fluid is clear, so the pinkish color in machine has me concerned.. of course I have an important job coming up.. and just finished replacing the FEL dump cylinder rod.. so hoping I can put machine to work for about a 3-4 hour job and then do a complete fluid change this summer.
Appreciate any advice

 

[North Idaho Wolfman]

1st time using my PTO.. attaching a woods mower on a Late 70s early 80s kubota Gear driven B7100. the PTO is grinding when I engage the lever to raise mower attachment while tractor is running.
I know the lift works, if I shut OFF the tractor, engage the lever to lift position and restart the tractor, the mower will lift!
Is this some type of safety feature? Or should the lever engage while tractor is running without grinding?
Am I doing something wrong?

First things first, I'm a little confused as there is no correlation to the PTO spinning and the three point lifting, one is mechanical and the other is hydraulic.
The Three point lift can not cause the PTO to grind.

When you engage the PTO you need to push in on the clutch then engage the PTO or that will grind.

If the three point feed back rod is adjusted wrong then the three point will go into relief, sounds like a grinding.

I do not not know which direction to turn the little spacer L shaped brackets that go on to the bottom PTO shafts?

Ok, what are you calling the "PTO shafts" ? , as there is only one PTO shaft.

If the PHD fits then it will work.

Drain the fluid and replace it and the filters now, not later, it's either has algae or ATF fluid in it, both are very bad for the systems.
Water in the system will cause some very erratic operations.

 

[hodge]

If I understand your situation correctly, you are hearing a whining or grinding noise as you raise the 3 point. That is hydraulic fluid passing through the valve; if you pull it fully back, it won't make the noise. It does it if you are feathering the lift. That is normal for the tractor, and not related to the pto engagement.

 

[Temblor]

If I understand your situation correctly, you are hearing a whining or grinding noise as you raise the 3 point. That is hydraulic fluid passing through the valve; if you pull it fully back, it won't make the noise. It does it if you are feathering the lift. That is normal for the tractor, and not related to the pto engagement.

Sorry wrong terminology.. yes the 3 point is grinding if I try to activate the raise lever while the engine is running.
If I turn off engine, engage lever, it raises OK.
Definitely sounds loud like gears grinding.. araid to pull lever further as I might chip some teeth or cause damage?

 

[Temblor]

If the three point feed back rod is adjusted wrong then the three point will go into relief, sounds like a grinding.

Drain the fluid and replace it and the filters now, not later, it's either has algae or ATF fluid in it, both are very bad for the systems.
Water in the system will cause some very erratic operations.

thanks for info so far, so the lift is hydraulic? Wow, it sounds so much like gears grinding..
so unless I am missing some procedure to engage the lift (as this is the 1st time I ever used the 3 point lift) or i did something wrong in hooking the mower up, I will check that out..
Could someone help me with info on adjusting the feedback rod?

I still need to hook up the adjustable rods hanging off the side of the main 3 point arms... but I do not know where they attach for sure.. does anyone have pictures of a B7100 with mower attachment on?

 

[SDMauler]

You might want to make sure the PTO shaft is fully coupled onto the PTO output shaft. Sounds like it may only be halfway on, and when you raise the deck, the spinning PTO shaft is running into the teeth on the output shaft of the trans after the groove, and causing the grinding noise. You have to pull that coupling ring back pretty far, then push it onto the shaft until it clicks in place. To make matters worse, sometimes the spring behind the coupling ring gets stacked up so the ring won't go back far enough. You might also shoot a little WD40 on the shaft to make it easier to get fully engaged.

 

[North Idaho Wolfman]

First go here and download the three part service manual, it will be a major help, you can also get the operators and owner manuals too.

http://kubotabooks.com/AutoIndex/in...s/&AutoIndex=1c65843aab6189a2bcf1cf61236f4ddb

 

[Temblor]

First go here and download the three part service manual, it will be a major help, you can also get the operators and owner manuals too.

http://kubotabooks.com/AutoIndex/in...s/&AutoIndex=1c65843aab6189a2bcf1cf61236f4ddb

Thanks for link! yes this will help..
Do you know if part 4 or 5 is available for service manual B7100 ?
Thanks again

 

[North Idaho Wolfman]

Thanks for link! yes this will help..
Do you know if part 4 or 5 is available for service manual B7100 ?
Thanks again

Part 4 and 5 ?????
The complete manual is only three parts.

 

[Temblor]

Part 4 and 5 ?????
The complete manual is only three parts.

From what I downloaded part 3 only goes to page 46 ?

 

[North Idaho Wolfman]

Why are you thinking its short pages?
Is it because of the index saying 100?
The index is in paragraphs not pages.

 

[Temblor]

I did not mention that my Tractor is gear drive. Does that make any difference on lift ?
So I lowered the idle and took the plunge and raised pto lift while engine was running and it worked, but the squealing is worrying... (It sounded like gears but I guess it is whining)
Would adjusting feedback rod remedy that?

On a separate issue, the clutch was supposed to have been replaced not long ago.. the clutch will not engage until I have let the clutch pedal almost all the way out. is this normal? Can I adjust clutch and remedy this?

Thank you for any and all help

 

[Temblor]

If I understand your situation correctly, you are hearing a whining or grinding noise as you raise the 3 point. That is hydraulic fluid passing through the valve; if you pull it fully back, it won't make the noise. It does it if you are feathering the lift. That is normal for the tractor, and not related to the pto engagement.

OK, will try this

 

[hodge]

I did not mention that my Tractor is gear drive. Does that make any difference on lift ?
So I lowered the idle and took the plunge and raised pto lift while engine was running and it worked, but the squealing is worrying... (It sounded like gears but I guess it is whining)
Would adjusting feedback rod remedy that?

On a separate issue, the clutch was supposed to have been replaced not long ago.. the clutch will not engage until I have let the clutch pedal almost all the way out. is this normal? Can I adjust clutch and remedy this?

Thank you for any and all help

The whining is normal. It is inherent in that type of hydraulic system. It isn't position control; it is simply an on/off valve. What you hear is the passage of fluid through a partially opened valve. When you open it all the way, you don't hear it. When you feather it, you do. The closer to the neutral position, the more it whines- the passage for the fluid is very small at that stage.

 

[Temblor]

The whining is normal. It is inherent in that type of hydraulic system. It isn't position control; it is simply an on/off valve. What you hear is the passage of fluid through a partially opened valve. When you open it all the way, you don't hear it. When you feather it, you do. The closer to the neutral position, the more it whines- the passage for the fluid is very small at that stage.

My B7100 tractor is gear drive, The backhoe has a separate pump and the FEL has a separate pump.
Just to be clear, does the tractor have an Internal Hydraulic Pump which runs the the 3 point lifting arms?
(If so where is pump located?)
Sorry for the dumb questions, this is my first tractor.. big learning curve.

 

[North Idaho Wolfman]

Not internal, but external, it's on the right side behind the injection pump.