PTO problems after hitting a object

Dennis (VA) · Jun 30, 2016

I hit an object bush hogging and while the PTO turns normally when i hook up the bush hog or the finish mower it does not turn. At first, I thought it was the attached override clutch, new one on order, but now I'm not so sure. Getting the override off was a real pain but in doing so, I found when I had the PTO lever in the on position, I could still turn the PTO with a lot of struggle. Seems, to me with the PTO engaged it should not turn and wonder if, this causes its inability to turn a mower. If so, what needs fixing?

souNdguy · Jun 30, 2016

Lean tractor nose down, pull pto shaft. You nigh only get half of it out!

Broke shaft is one possibility, damaged coupler another, gets worse from there with trans involvement.

Post back.

Tall T · Jun 30, 2016

Dennis,

Bummer!

Just curious . . . what exactly did your blades hit?
Now that I've got my MF Cutter back together I'm afraid to use it.

I guess, that as well as poking around for hidden rocks and stumps, I should go over areas with my landscape rake before mowing.

Thanks,
T

rd 2N in mo · Jun 30, 2016

did you shear a bolt or pin?

R Geiger · Jun 30, 2016

(quoted from post at 11:06:18 06/30/16) Dennis,

Bummer!

Just curious . . . what exactly did your blades hit?
Now that I've got my MF Cutter back together I'm afraid to use it.

I guess, that as well as poking around for hidden rocks and stumps, I should go over areas with my landscape rake before mowing.

Thanks,
T

It really helps to know what is in the area you are mowing, You will find all the rocks and stumps the first time you mow.

I keep having limbs drop off of trees, it they are not too big, they get chopped up. The blades on attach to the stump jumper with a single bolt so that they will swing back out of the way it they hit something solid.

In this case I agree with Soundguy about the chance that the shaft is sheared.

Tall T · Jun 30, 2016

Mr. Geiger,

Falling limbs . . . good point.
You said that the blades attach to the stump jumper (which I don't got) and swing freely. Don't they all swing freely at the blade mount point even without the Stumper, like mine do?

Thanks,
T

R Geiger · Jun 30, 2016

Don't know, I haven't seen all of them

I would hope they do.

ZANE · Jun 30, 2016

Will the tractor move forward in gear?????

Zane

Caryc · Jul 1, 2016

(quoted from post at 11:30:36 06/30/16) Mr. Geiger,

Falling limbs . . . good point.
You said that the blades attach to the stump jumper (which I don't got) and swing freely. Don't they all swing freely at the blade mount point even without the Stumper, like mine do?

Thanks,
T

Sure the blades swing freely. The trouble is without a stump jumper that nice solid blade bar smacks into something solid like a stump or a rock and that tremendous WHACK is transmitted into your gear box and out to your drive shaft and into your tractor.

Take my advice and get a stump jumper and install it if you can. I ran my Woods M5 mower for years before I found out that I could actually buy a stump jumper to fit it although it does have a slip clutch on it which I rebuilt. I feel lots better mowing with it now.

Dennis (VA) · Jul 1, 2016

I'll try to combine the question and suggestion. The area has been farmed since well before the Civil War and I currently lease out
the area for farming so only God knows what comes to the surface. The object I hit maybe a blade from disk harrow. Not sure really.
The bush hog has a sump jumper and everything turns freely on it. So the problem is on the tractor. Yes, the tractor drives around
fine. I'll put on the new PTO overrunning clutch tomorrow and let you guys know.

SoundGuy and Others. Is there a clutch our or something that the PTO lever engages to turn on the PTO?

Again, thanks for the help!

JMOR · Jul 1, 2016

I don't call it a clutch. More like sliding a socket wrench over a nut, except it is a sleeve with internal gear teeth sliding over a gear.

TheOldHokie · Jul 1, 2016

(quoted from post at 19:25:08 07/01/16) I don't call it a clutch. More like sliding a socket wrench over a nut, except it is a sleeve with internal gear teeth sliding over a gear.

Vocabulary word for the day. ;-) That sort of mechanism which is commonly used to couple/decouple two drive shafts is known in the machine trade as a "dog clutch".

[b:6e48f1a3ce]dog clutch[/b:6e48f1a3ce]

[i:6e48f1a3ce]noun[/i:6e48f1a3ce]

a device for coupling two shafts in order to transmit motion, one part having teeth that engage with slots in another.

JMOR · Jul 1, 2016

(quoted from post at 19:37:23 07/01/16)

(quoted from post at 19:25:08 07/01/16) I don't call it a clutch. More like sliding a socket wrench over a nut, except it is a sleeve with internal gear teeth sliding over a gear.

Click to expand...

Vocabulary word for the day. ;-) That sort of mechanism which is commonly used to couple/decouple two drive shafts is known in the machine trade as a "dog clutch".

[b:e8e31567e1]dog clutch[/b:e8e31567e1]

[i:e8e31567e1]noun[/i:e8e31567e1]

a device for coupling two shafts in order to transmit motion, one part having teeth that engage with slots in another.

ommon in motorcycles, but I figured he wouldn't know what it described. :roll:

KL-VA · Jul 2, 2016

I often hit roots and stumps blazing trails in the woods with no damage. Then one day the cutter stopped dead on a small mound. There was a very loud noise and it broke the shear pin on my cutter. PTO shaft was fine. Concealed in that mound was a 20 pound hunk of steel that appeared to be part of a skid from some type of heavy equipment. I'm curious if your PTO shaft was an original or a replacement 1-3/8" shaft? I use an original 1-1/8" shaft with conversion to 1-3/8 provided by an overrunning clutch. Somehow I formed the opinion that the original shafts were made of better quality steel than the replacement 1-3/8" shafts.

Dennis (VA) · Jul 3, 2016

The PTO shaft is the original 1 1/8" with overrun to get to 1 3/8"

PTO problems after hitting a object

Dennis (VA)

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souNdguy

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Tall T

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rd 2N in mo

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R Geiger

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Tall T

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R Geiger

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ZANE

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Caryc

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Dennis (VA)

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TheOldHokie

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JMOR

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KL-VA

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Dennis (VA)

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