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Hi. I have a Gravely walk behind tractor and i finally got it running, but it wont move when i try and put it into gear,but the PTO still works when i push the PTO lever. Does anyone know how to fix this.:dunno:
Gravely won't move
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Wow nice paint. You will defiantly have problems moving that tractor.What machine are you working on? Does it look like this? :dunno:
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:fing32:
:wwp:
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Curious, have you ever operated a Gravely two wheel tractor before?
In case you haven't....
There are two operating levers on the right handle bar, the inside lever controls the range, high/low, the outer lever is direction, FWD/REV. To get the tractor moving select the range of motion, inner lever positioned FWD will place the tractor in High range, back will give you low range. Now to move the Tractor forward move the outer lever aft, or towards you, to move the tractor in reverse mover the outer lever forward. Prior to selecting the speed range or direction of travel decide if you want to engage an attachment, if so engage the attachment the select the speed range.
Now if you know this then my next question is if this tractor is equipped with the two speed axel, or swiftamatic differential, if so check to see if the engagement lever is between the two ranges, that will keep the tractor from moving. The swiftamatic differential lever is a smaller lever mounted near and under the exhaust, for high range pull the lever toward you, for low range push the lever towards the front of the tractor.
Now if you know all this then let us know as there will be other things to check and or look for.
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In case you haven't....
There are two operating levers on the right handle bar, the inside lever controls the range, high/low, the outer lever is direction, FWD/REV. To get the tractor moving select the range of motion, inner lever positioned FWD will place the tractor in High range, back will give you low range. Now to move the Tractor forward move the outer lever aft, or towards you, to move the tractor in reverse mover the outer lever forward. Prior to selecting the speed range or direction of travel decide if you want to engage an attachment, if so engage the attachment the select the speed range.
Now if you know this then my next question is if this tractor is equipped with the two speed axel, or swiftamatic differential, if so check to see if the engagement lever is between the two ranges, that will keep the tractor from moving. The swiftamatic differential lever is a smaller lever mounted near and under the exhaust, for high range pull the lever toward you, for low range push the lever towards the front of the tractor.
Now if you know all this then let us know as there will be other things to check and or look for.
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A few more details? What model is it?
When you say the PTO works, does that mean it drives an attachment like a mower, or just that the shaft is spinning?
When you put it hi or lo and then select forward or reverse, does nothing happen at all? If you jack it up, do the wheels spin?
When you select forward or reverse, does the lever just drop in, or do you have to push it?
The gravely transmission is pretty simple. If the PTO is working enough to drive an attachment, that says that your hi/lo clutches are ok, so the problem is likely fwd/rev. If you're not encountering any resistance on the fwd/rev lever, I'd try tightening the jam nuts on the control rod first. The clutches do wear over time. Though it would have to be very worn to not move at all.
One other long shot: I worked on a tractor a while ago which had sheared one of the axle keys. The effect was that on one wheel, the axle just turned in the hub. PTO worked, but no motion. It's the only one I've ever seen like that, but it's possible.
Good luck and :wwp:
When you say the PTO works, does that mean it drives an attachment like a mower, or just that the shaft is spinning?
When you put it hi or lo and then select forward or reverse, does nothing happen at all? If you jack it up, do the wheels spin?
When you select forward or reverse, does the lever just drop in, or do you have to push it?
The gravely transmission is pretty simple. If the PTO is working enough to drive an attachment, that says that your hi/lo clutches are ok, so the problem is likely fwd/rev. If you're not encountering any resistance on the fwd/rev lever, I'd try tightening the jam nuts on the control rod first. The clutches do wear over time. Though it would have to be very worn to not move at all.
One other long shot: I worked on a tractor a while ago which had sheared one of the axle keys. The effect was that on one wheel, the axle just turned in the hub. PTO worked, but no motion. It's the only one I've ever seen like that, but it's possible.
Good luck and :wwp:
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This is my first Gravely so I dont know a lot about them. When i said the PTO works all i know is that it spins because i have not attatched it to any attachments yet. Also when i put it in gear it doesnt do anything although i havent put it on jacks to see if it will free wheel.
Attachments
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I would try the jam nuts like he said first, I had a simular problem, when I was plowing with mine and droped the plow down deep, the tractor would quit tramming, I could push down on the handle bars and raise the pow out of the dirt and it would take off again, I tightend the jam nuts up on my FWD/REV and that fixed the problem.
The PTO shaft will spin even if the clutches aren't engaged. This transmission uses cone clutches running in oil, and there's always some drag.
As above, start with the jam nuts. You should feel some resistance from the levers as you push them to either end of their travel.
If what you're suspecting is that the final drive is toast, that's possible, though unlikely. When you push the tractor, not running, on flat ground, how hard is it? Depending on what model (L, LI, LS) it should be medium, hard, or very hard to push it. (What you're doing is driving a worm gear backwards) If it's really easy to push around, there's something busted.
BTW I'm still assuming you've got some variety of L model. Like the left hand one in Cadplans' pic. Also, if it's an L8, or for that matter one of the later kohler powered units with an 8-speed transmission, it could be that swiftomatic axle is hung up between gears, that effectively puts the axle in neutral.
:wwp:
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Today i tried adjusting the jam nuts and still nothing happened. Then i put it on some jacks and it wouldnt even free wheel. It feels like it pushes easy but im not sure. So what is it that i should try next. see if the clutch is out or gears are jammed ect.. and if so how? Also thank you for the help so far.
I assume the photos you posted are your new to you tractor.
Remove that front cover and tell us if there is a stud on the inside center which sticks out about 1 1/2". That stud will keep the long pinion drive shaft engaged in the H/L planetary assembly. If the is no stud, then the drive shaft can slide forward about an inch and you will loose drive between the H/L and F/R drives. If that happens, just reach in turn and push the long splined shaft until it engages the H/L again.
An attachment with a safety clutch holds the shaft in place. A front cover must have the stud to hold the shaft in place. Does your cover have that stud.
Roger,
Remove that front cover and tell us if there is a stud on the inside center which sticks out about 1 1/2". That stud will keep the long pinion drive shaft engaged in the H/L planetary assembly. If the is no stud, then the drive shaft can slide forward about an inch and you will loose drive between the H/L and F/R drives. If that happens, just reach in turn and push the long splined shaft until it engages the H/L again.
An attachment with a safety clutch holds the shaft in place. A front cover must have the stud to hold the shaft in place. Does your cover have that stud.
Roger,
Roger, would the PTO still spin if the pinion shaft was disengaged from the H/L planetary? In an earlier post, Charlie said the PTO was spinning, so I figured that part must be ok.
Charlie when you adjusted the jam nuts on the control rods, did you tighten them to the point where you feel some resistance when locking the lever down to one side or the other?
When you put it on jacks, and "it wouldn't free wheel" does that mean you got both wheels off the ground and tried turning a wheel by hand? In that case you should get the other wheel turning the opposite way, that's the differential in action. If you try to turn both wheels the same way, they should turn, but it will be substantially harder.
Also ditto Roger's advice, let's make sure that pinion shaft hasn't slid forward. I may have assumed badly that if it's out it will stop spinning. That's an easy one to check.
Charlie when you adjusted the jam nuts on the control rods, did you tighten them to the point where you feel some resistance when locking the lever down to one side or the other?
When you put it on jacks, and "it wouldn't free wheel" does that mean you got both wheels off the ground and tried turning a wheel by hand? In that case you should get the other wheel turning the opposite way, that's the differential in action. If you try to turn both wheels the same way, they should turn, but it will be substantially harder.
Also ditto Roger's advice, let's make sure that pinion shaft hasn't slid forward. I may have assumed badly that if it's out it will stop spinning. That's an easy one to check.
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Strange, you said that the PTO engaged when you pouched the lever, am I assuming correctly that you have some sort of powered implement mounted to the tractor and if so a you physically observing the implement work? If you have an implement on the front of the tractor or the correct block-off plate then the pinion shaft has not slid forward.
Has any work been performed on the high/low planetary that you know of?
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Has any work been performed on the high/low planetary that you know of?
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I hate assuming, it always bites me in the behind.
cmeyers, my PTO's engage when I pull the handle, and dis-engage when I push the handle.
So, what does our new user mean? That the handle works the dog gear, and is the pinion shaft is really turning with H/L engaged?
Charlie may be sliding the pinion shaft into and out of the H/L sun gear when he is shifting the PTO. We need to see the inside of that cover plate.
Roger,
cmeyers, my PTO's engage when I pull the handle, and dis-engage when I push the handle.
So, what does our new user mean? That the handle works the dog gear, and is the pinion shaft is really turning with H/L engaged?
Charlie may be sliding the pinion shaft into and out of the H/L sun gear when he is shifting the PTO. We need to see the inside of that cover plate.
Roger,
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