Three Point hitch Problems
Help! My Yanmar's Three Point Hitch Is Broken! How do I fix it?This is one of the most common technical questions we get asked. Before we can help, you need to do a little troubleshooting. There are, basically, 3 types of hydraulic lift problems- Won't go up, won't stay up, & won't go down. The information below is designed to be very basic troubleshooting help & is not intended to offer all of the steps needed. If you don't think you can do this yourself, please contact a local mechanic for help.
Three Point Down & Won't Go Up
Three Point Won't Stay Up- Leaks Down.Lift the three point all the way up and close the lock valve (usually located between your knees lust under the seat- see fig A). Shut off the tractor. If the three point still seeps down then you probably have a bad lift piston oring because, by closing the lock out valve, you have eliminated the valve & everything else in the system. If the three point stays up then you likely have a problem with the three point control valve.
Three Point Up And Won't Go Down
If you remove the lock out valve and the three point does not go down, then you have a mechanical binding somewhere in the lift piston or rock shaft area. This is normally caused by water in the oil or even just condensation causing rust on the lift cylinder walls which causes the piston to stick. Typically what happens is the cylinder walls will rust above or below the normal piston travel range. If the piston is forced higher or lower than it normally travels it will get wedged into this rusty area and stick. You will need to remove the lift piston and inspect the cylinder walls & piston for scarring or damage.