hi. wat kind of tractor is it. make and is it a compact or utility. utility being farm/barnyard tractor size. im a farmer who owns a landscaping company so ive been doing repairs on tractors since forever. read the owners manual and look for something called "traction booster" this happend to my Allis-Chalmers 7000 this year. were the 3 point would go up but not down. the traction booster lever should be next to all the 3 point levers. after many years of not being used the lever will need to be adjusted. but before i can go into fruther detail i need to kno wat kind of tractor and a picture or 2. or more

 

If this is, as i suspect, a L-3600 Kubota, look for draft control lever, or position control lever on the 3 point hitch controls. I think there is also a speed control knob on most Kubotas, that controls the speed at which the lift arms go up or down. Is this a kubota hoe, made for the tractor, or an aftermarket hoe, running of the pto?

 

hi. wat kind of tractor is it. make and is it a compact or utility. utility being farm/barnyard tractor size. im a farmer who owns a landscaping company so ive been doing repairs on tractors since forever. read the owners manual and look for something called "traction booster" this happend to my Allis-Chalmers 7000 this year. were the 3 point would go up but not down. the traction booster lever should be next to all the 3 point levers. after many years of not being used the lever will need to be adjusted. but before i can go into fruther detail i need to kno wat kind of tractor and a picture or 2. or more

Hello Hoy, good to see another Allis enthusiast on this forum, I cut my teeth driving D-series Allis Chalmers tractors, still have 5 of em on the farm. My d-10 had a problem similar to the one you describe. I was Disc-plowing with a new(to me) ford 2 bottom plow, and tried adjusting the TB lever, goldurned thing started to come up out of the ground, wouldn't go back down, I finally found a way to reach through all the linkages, and tap the offending valve piston back to where it was, before I started messing with it! If you want to see all things Allis, do a google search for the unofficial Allis-Chalmers web page. Almost as much traffic over there as there is here.:waving:

 

its a kubota L3600 with a 4690? 3pt hitch kubota backhoe. i think the presure relief valve needs adjusting, just dont know where it is. this has nothing to do with the lift arms, it runs off the pto pump.

 

I'm not sure if this helps or not, short of having the right manual, look between your legs, as you are sitting on the seat, is there a knurled knob facing forward on the tractor? That's where it is on the older tractors. (I know that there are a multitude of punny responses probably coming , just ignore them!):laugh::laugh:

 

A 3 point hitch DOES NOT have down pressure, there is a knob below your seat that controls the rate of descent, but it will not hold the arms down. There should be a fixed link that goes to the toplink or to the drawbar to keep the backhoe from rising up. Otherwise, there is nothing to keep the 3 point arms down.

Aaron Z

 

A 3 point hitch DOES NOT have down pressure, there is a knob below your seat that controls the rate of descent, but it will not hold the arms down. There should be a fixed link that goes to the toplink or to the drawbar to keep the backhoe from rising up. Otherwise, there is nothing to keep the 3 point arms down.

Aaron Z

glad somebody said it...3 points go down on gravity

 

glad somebody said it...3 points go down on gravity

I agree, no down pressure on the arms, I thought he was talking about down pressure on the hoe stabilizers, to pick the tractor up. As I look back, at the OP, this could be dependent on several factors, such as how the hoe is plumbed(ie: through remote function of the tractor, or pto pump running a separate system). Oh well, clear as mud!:laugh::laugh:

 

I agree, no down pressure on the arms, I thought he was talking about down pressure on the hoe stabilizers, to pick the tractor up. As I look back, at the OP, this could be dependent on several factors, such as how the hoe is plumbed(ie: through remote function of the tractor, or pto pump running a separate system). Oh well, clear as mud!:laugh::laugh:

Unless there is a fixed toplink (going to the middle connection of the 3 point hitch) or a checkchain going to the drawbar he will not be able to pickup the tractor with the hoe as the 3 point arms will not resist the upward pressure of the backhoe.

Aaron Z

 

Unless there is a fixed toplink (going to the middle connection of the 3 point hitch) or a checkchain going to the drawbar he will not be able to pickup the tractor with the hoe as the 3 point arms will not resist the upward pressure of the backhoe.

Aaron Z

This I already knew, suggest you look carefully at the OP.:waving:

 

ill take photos, the backhoe itself has lifted the tractor, it does have some down preasure. im not talking about the stabilizers. it does have a fixed toplink. hopefully with pictures it will help my problem. there must be a way to set the preasure relief valve.

 

heres the pics. let me know if there is a pic/closeup you need. this thing has lifted the back end of the tractor up without the stablizers

 

Since I see a pto pump, I will assume that all of the backhoe functions are plumbed through that pump. Is there a piece of steel that locks your toplink on the hoe to the bracket on the center bracket? This should be in place, and the lift arms should be held in the same relative position, at all times. There will be no down pressure from the lift arms, the stabilizer arms should do the lifting, if any is done. Most of these small hoes do not put a lot of down pressure on the stabilizers, as you really don't want to lift the tractor much off the ground, as this would affect how deep the hoe will dig. Main thing they do is to keep the tractor from rolling backward as you dig.

 

Since I see a pto pump, I will assume that all of the backhoe functions are plumbed through that pump. Is there a piece of steel that locks your toplink on the hoe to the bracket on the center bracket? This should be in place, and the lift arms should be held in the same relative position, at all times. There will be no down pressure from the lift arms, the stabilizer arms should do the lifting, if any is done. Most of these small hoes do not put a lot of down pressure on the stabilizers, as you really don't want to lift the tractor much off the ground, as this would affect how deep the hoe will dig. Main thing they do is to keep the tractor from rolling backward as you dig.

yes, there is steel toplink. i understand how stabilizers work, thank you. the boom of the backhoe has no down preasure. at one time it would lift the rear tires off the ground. now it doesnt. i dont know where the preasure relief valve is that controls this. can anyone help me?

 

First thing I would do is to find the filter for the system, and check it, by replacing with a new one. Then check the suction line for collapse or a kink, then run a pressure and flow test on your pump. Since you probably don't have the tools for this, take the pump off, and take it to a hydraulic shop. I assume that you have a manual with specs for the pump's GPM, and pressure. After all this is done, then move to the valve bank, and look for a relief valve. Sometimes the easiest way to find the relief valve is to pull a lever all the way in the raise position, and hold it there, till you hear a buzz or whoosh sound, then feel around the valve bank, and you will find the buzzing, or noise making part is the relief valve. It will be a section of the valve, with no hoses connected to it. There may be a cover projecting out, with a couple of hex head screws holding it on. Once you remove the cover, there will be a fine threaded stud with a couple of nuts, holding pressure on a spring, which holds a steel ball against a port. If the spring is broken, ball is pitted from continuous operation, or water damage, you may have found a cause of your problem. Hope this all makes it clear as mud, a manual and troubleshooting guide for your hoe is priceless, at this point!:waving: