Ok guy's. I finally got to my loader today. Sorry for the delay and also no pictures.
First I used a 1/4 pipe to 3/8 pipe bushing for the gauge I was using and attached this to one of the quick couplers at the loader control valve. I did not buy another quick coupler because the gauge was borrowed from work. I also capped off the hose end that I removed from the quick coupler I had the gauge attached to to reduce oil spill.
So the moment of truth. The first psi check before doing anything was a lowly 2300 psi. No wonder it would not pick up what I felt it should.
Next get a clean bucket to catch hydraulic oil when you remove the check valve which is located under your right foot. You will see the filter and some steel lines and hoses. The relief valve points straight down in the center of this block. You can't miss it.
I don't remember the exact socket size but larger than 1". Remove it slowly and oil will continue to drain while it is removed. If you hold it vertical while removing it all stays together and comes out as a unit. The nut, spring and a valve.
Remove the spring and at the bottom of the nut portion is the spring seat. This is where the shims go. Mine had a .5mm shim. I used a 2.5 mm thick washer that was the right diameter. I reinstalled the check valve and rechecked my pressure.* 3300 psi.* Oops. To
high.
After two more shots I ended up removing the factory .5mm shim and added 2.0 mm shims. Pressure is now at 2750-2800 psi. Right at the high end of the spec.
I decided not to push it over the spec.
So the big test will be to see how it works with 500 psi increase. That is pretty substantial and I am expecting to notice a large difference in lifting power.There is another thread going about loader cylinder size and pressure realtionship. 500 psi should add quite a bit of lifting power.
I did all of this outside in the gravel because you will spill hydraulic fluid.I talked to a Kubota mechanic this week and he told me they are usually set low and they increase the pressure if someone complains about poor performance.
I hope this helps some of you. It is really a piece of cake. Brian
First I used a 1/4 pipe to 3/8 pipe bushing for the gauge I was using and attached this to one of the quick couplers at the loader control valve. I did not buy another quick coupler because the gauge was borrowed from work. I also capped off the hose end that I removed from the quick coupler I had the gauge attached to to reduce oil spill.
So the moment of truth. The first psi check before doing anything was a lowly 2300 psi. No wonder it would not pick up what I felt it should.
Next get a clean bucket to catch hydraulic oil when you remove the check valve which is located under your right foot. You will see the filter and some steel lines and hoses. The relief valve points straight down in the center of this block. You can't miss it.
I don't remember the exact socket size but larger than 1". Remove it slowly and oil will continue to drain while it is removed. If you hold it vertical while removing it all stays together and comes out as a unit. The nut, spring and a valve.
Remove the spring and at the bottom of the nut portion is the spring seat. This is where the shims go. Mine had a .5mm shim. I used a 2.5 mm thick washer that was the right diameter. I reinstalled the check valve and rechecked my pressure.* 3300 psi.* Oops. To
high.
After two more shots I ended up removing the factory .5mm shim and added 2.0 mm shims. Pressure is now at 2750-2800 psi. Right at the high end of the spec.
I decided not to push it over the spec.
So the big test will be to see how it works with 500 psi increase. That is pretty substantial and I am expecting to notice a large difference in lifting power.There is another thread going about loader cylinder size and pressure realtionship. 500 psi should add quite a bit of lifting power.
I did all of this outside in the gravel because you will spill hydraulic fluid.I talked to a Kubota mechanic this week and he told me they are usually set low and they increase the pressure if someone complains about poor performance.
I hope this helps some of you. It is really a piece of cake. Brian
