Greetings everyone. I am new to the forum, so this is my first post. Not sure if anyone else has had this problem, but my 4-way valve sounds like my bucket tilt circuit is deadheading (making that sort of screeching sound you here when you deadhead the bucket tilt after it has made its full travel). As a result, I barely have any lift (slower than a turtle). The odd thing is that I can do a simultaneous tilt and lift with the joystick (angled position) and the bucket will lift and tilt at the same time as it normally would.
Having little knowledge about these control valves, I first found a parts breakdown for the valve. It is being used on a 1997 B7610 with a LA352 loader.
The first thing I did was to swap the cylinders around (quick disconnects) to see if I had lift but no tilt. The answer is yes. The next thing I did was to remove, clean, blow out, etc. both load check valves. The plunger and springs look good, so I swapped them to see if the problem remained the same. No change...same problem. Next, I removed both hex cans at the bottom of the valve to clean and inspect. Everything looked normal, but I didn't take them apart due to the aggravating groove ring that would have to be removed. At this point, I checked both spools; and they both move freely up and down. The springs for both spools look good and each spool centers like it should. I then removed the quick disconnects from the valve and blew the valve body out as much as possible, while moving each spool up and down. Put everything back together. Still no change. When I begin to move the bucket tilt spool, the deadheading sound disappears. But, as soon as I release the joystick, that deadheading sound comes back.
BTW, the pictorial I am using matches my control valve exactly. The Kubota reference is 01B00503.
The tractor has 500 hours on it. The valve linkage is excellent and there are no leaks at the valve or anywhere else. Haven't messed with the pressure relief area, as it appears to be working properly as far as pressure goes. This scenario happened for a short time a couple of winters ago, but then went away. It has now come back and is not going away. Have I missed something, other than to completely disassemble the valve and blow out every orifice I can find?
Thank you for any help you can offer.
Having little knowledge about these control valves, I first found a parts breakdown for the valve. It is being used on a 1997 B7610 with a LA352 loader.
The first thing I did was to swap the cylinders around (quick disconnects) to see if I had lift but no tilt. The answer is yes. The next thing I did was to remove, clean, blow out, etc. both load check valves. The plunger and springs look good, so I swapped them to see if the problem remained the same. No change...same problem. Next, I removed both hex cans at the bottom of the valve to clean and inspect. Everything looked normal, but I didn't take them apart due to the aggravating groove ring that would have to be removed. At this point, I checked both spools; and they both move freely up and down. The springs for both spools look good and each spool centers like it should. I then removed the quick disconnects from the valve and blew the valve body out as much as possible, while moving each spool up and down. Put everything back together. Still no change. When I begin to move the bucket tilt spool, the deadheading sound disappears. But, as soon as I release the joystick, that deadheading sound comes back.
BTW, the pictorial I am using matches my control valve exactly. The Kubota reference is 01B00503.
The tractor has 500 hours on it. The valve linkage is excellent and there are no leaks at the valve or anywhere else. Haven't messed with the pressure relief area, as it appears to be working properly as far as pressure goes. This scenario happened for a short time a couple of winters ago, but then went away. It has now come back and is not going away. Have I missed something, other than to completely disassemble the valve and blow out every orifice I can find?
Thank you for any help you can offer.
After completely disassembling the 4-way control valve, cleaning, blowing everything out with compressed air and reassembling, I still had the same problem. Scratching my head, I began Googling again to see if I could find a post that claimed a similar problem. Sure enough, I ran across a U-tube video that showed the same problem I was having. Reading through the video posts, the fix was embarrassing.
