Rotary Cutter Stabilizer chains - brush cutter
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greg_g
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Check chains are intended for tractors without functioning hydraulics - or at least without position control. I've used them temporarily while awaiting parts to fix a hydraulics problem. The fact you're considering them for a Kubota sounds to me like you've got a leakdown problem. If I owned a B7800, I think I'd fix the hydraulics, rather than apply a steel bandaid
//greg//
//greg//
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survriggs
Silver Member
Greg: Point well taken. My 7800 does not have position control, it has the quarter inching valve system. It has done this since it was new (it has 39 hrs. on it). There are no visible leaks and it goes down very very slow. I also figured (maybe erroneously) that the chains would take some of the stress off of the 3ph system???
flusher
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Check this link. I think it has the info you need.
Check chains
That link contains this photo (see attachment) which shows the slick way to attach these chains.
I have a new B7510HST that has the same slow leak-down on the 3pt.
My tractor has a knob for controlling the up-down speed of the 3pt. According to info in another thread, turning this knob full OFF is supposed to stop this problem. Haven't tried it yet since my leak-down is so slow that it doesn't cause me any problems when brush hoggin' or back blading.
Check chains
That link contains this photo (see attachment) which shows the slick way to attach these chains.
I have a new B7510HST that has the same slow leak-down on the 3pt.
My tractor has a knob for controlling the up-down speed of the 3pt. According to info in another thread, turning this knob full OFF is supposed to stop this problem. Haven't tried it yet since my leak-down is so slow that it doesn't cause me any problems when brush hoggin' or back blading.
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flusher
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Here's the Link.
MikePA: Please review your message before posting it. It's simple not to create a long link that widens the entire thread. Just insert a descriptive word or two between the {url=http://whatever}<font color="red">Enter words here</font>{/url} instead of the entire URL. Replace parentheses {} with square brackets in previous example. Alternatively, if you use the Instant Markup language URL link, the first prompt is for the URL. The second prompt is for a description. Do not simply paste in the URL again. Type a short description of the link.
MikePA: Please review your message before posting it. It's simple not to create a long link that widens the entire thread. Just insert a descriptive word or two between the {url=http://whatever}<font color="red">Enter words here</font>{/url} instead of the entire URL. Replace parentheses {} with square brackets in previous example. Alternatively, if you use the Instant Markup language URL link, the first prompt is for the URL. The second prompt is for a description. Do not simply paste in the URL again. Type a short description of the link.
greg_g
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</font><font color="blue" class="small">( My 7800 does not have position control, it has the quarter inching valve system. )</font>
Actually, the quarter inch system is position control. Classic leakdown. Since it's a new tractor, I'd exercise the warranthy - rather than spend money on bandaids. Besides that, freight costs more than the actual cost of stabilizer chains themselves.
Fix the problem, not the symptoms.
//greg//
Actually, the quarter inch system is position control. Classic leakdown. Since it's a new tractor, I'd exercise the warranthy - rather than spend money on bandaids. Besides that, freight costs more than the actual cost of stabilizer chains themselves.
Fix the problem, not the symptoms.
//greg//
JerryG
Super Member
If the quarter inching system is position control it is taking the cheap way out. True position control will stop the lift at any position not just at quarter inch intervals. If someone had the Kubota reports on the quarter inch system, I would bet that is was designed to save Kubota some money.
greg_g
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</font><font color="blue" class="small">( If the quarter inching system is position control it is taking the cheap way out. )</font>
Based solely upon info I found on the Kubota website, the "quarter inching valve " is apparently what passes for position control on the B7800. The B7x10 series gets it too, in addition to a "true " position control.
In a press release, Kubota says "The Category I, 3-point hitch incorporates a new quarter inching valve that acts as a regulator, enabling the operator to make smaller adjustments at the lower link end. The lever guide can move in ¼-inch increments making attaching/detaching implements easier while enhancing grading performance."
//greg//
Based solely upon info I found on the Kubota website, the "quarter inching valve " is apparently what passes for position control on the B7800. The B7x10 series gets it too, in addition to a "true " position control.
In a press release, Kubota says "The Category I, 3-point hitch incorporates a new quarter inching valve that acts as a regulator, enabling the operator to make smaller adjustments at the lower link end. The lever guide can move in ¼-inch increments making attaching/detaching implements easier while enhancing grading performance."
//greg//
greg_g
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</font><font color="blue" class="small">( It has done this since it was new (it has 39 hrs. on it). There are no visible leaks and it goes down very very slow. I also figured (maybe erroneously) that the chains would take some of the stress off of the 3ph system??? )</font>
I'd bring it up with the dealer as a warranty item. Assuming the B7800 hydraulics are vented, you can have fluid seeping past the lift cylinder and back into the sump - and never see a drop on the ground.
If you rely on chains to compensate for leakdown, your lift arms will eventually go into a float condition. That's problematic too, because chains necessarily check the lift arm movement in the down direction - but are useless in stopping them from moving upwards. When that happens, some working angles - like mowing perpendicular across a crease - will cause scalping
//greg//
I'd bring it up with the dealer as a warranty item. Assuming the B7800 hydraulics are vented, you can have fluid seeping past the lift cylinder and back into the sump - and never see a drop on the ground.
If you rely on chains to compensate for leakdown, your lift arms will eventually go into a float condition. That's problematic too, because chains necessarily check the lift arm movement in the down direction - but are useless in stopping them from moving upwards. When that happens, some working angles - like mowing perpendicular across a crease - will cause scalping
//greg//
catvet
Gold Member
I to have problems with my brushhog on my B7800. I don't believe (for me) it's a hydraulic leak problem as much as a positioning problem with the 1/4 inching system. If I raise the brushhog to go over an obstacle I can't figure anyway to get it back to the same position. there isn't a "stop" that places the 3-point at a set height.
You can move the 3-point in small increments but not set where it is going to stop. Perhaps I misunderstand this whole system but that is how I see it. I'm pretty new to tractors.
You can move the 3-point in small increments but not set where it is going to stop. Perhaps I misunderstand this whole system but that is how I see it. I'm pretty new to tractors.