I got a gauge a Napa and a quick disconnect at kubota to test my hydro pressure at the loader valve. It read right at 2200 psi with the WSM spec being 2400-2450 psi.
I pulled the relief valve and found 3 washers and one machined spacer. Washers were about .030 and the spacer was .015 thick. From what I saw with the older B series adjustments .005 raised it by about 200 psi but that's not happened with my B2650. Not a huge surprise as its a completely different valve so I added a .005 and brought the pressure up very slowly and it only went up about 50 psi. I kept sneaking up on it and it turned out it took about .015 to raise it 200 psi on mine putting it right at 2400 psi which is the bottom of the recommended spec.
The cool part was it didn't cost me a dime to to the adjustment. Making the gauge was the only expense and it's good to have one of those around for diagnostics anyway. The spacers I used were just washers I had in my bins. They are a standard size, the only trick is to mic a few of them and pick out ones that are increasingly thicker than one of the washers that was already in the valve. So I still have just 3 washers and one .015 thick machined spacer, but one of the washers just happens to be .015 thicker than the original washer it replaced. So I didn't add any spacers just exchanged one washer. This is made easier by the fact that you will find washers vary quite a bit on thickness so you just gotta find one the thickness you want. Start small and sneak up on it. It only takes about 5 minutes to check a setup then if it's still low put in a slightly thicker one.
It's worth noting that very little fluid comes out when the valve is removed literally less than 1/2 oz.
Worked the machine pretty hard and 200 psi isn't night and day or anything but it's noticeable for sure, especially on the grapple holding power and clamp down. I was moving brush and trees but I suspect it would be very noticeable digging into a pile of dirt which I have yet to do since I adjusted it.
Of course Your results could be different on the spacing go in small increments and bring pressure up slowly.
I pulled the relief valve and found 3 washers and one machined spacer. Washers were about .030 and the spacer was .015 thick. From what I saw with the older B series adjustments .005 raised it by about 200 psi but that's not happened with my B2650. Not a huge surprise as its a completely different valve so I added a .005 and brought the pressure up very slowly and it only went up about 50 psi. I kept sneaking up on it and it turned out it took about .015 to raise it 200 psi on mine putting it right at 2400 psi which is the bottom of the recommended spec.
The cool part was it didn't cost me a dime to to the adjustment. Making the gauge was the only expense and it's good to have one of those around for diagnostics anyway. The spacers I used were just washers I had in my bins. They are a standard size, the only trick is to mic a few of them and pick out ones that are increasingly thicker than one of the washers that was already in the valve. So I still have just 3 washers and one .015 thick machined spacer, but one of the washers just happens to be .015 thicker than the original washer it replaced. So I didn't add any spacers just exchanged one washer. This is made easier by the fact that you will find washers vary quite a bit on thickness so you just gotta find one the thickness you want. Start small and sneak up on it. It only takes about 5 minutes to check a setup then if it's still low put in a slightly thicker one.
It's worth noting that very little fluid comes out when the valve is removed literally less than 1/2 oz.
Worked the machine pretty hard and 200 psi isn't night and day or anything but it's noticeable for sure, especially on the grapple holding power and clamp down. I was moving brush and trees but I suspect it would be very noticeable digging into a pile of dirt which I have yet to do since I adjusted it.
Of course Your results could be different on the spacing go in small increments and bring pressure up slowly.
