Well, after reading many posts I worked on my hydraulics. That was not a problem. Wanting faster results was. I will describe what happened how I fixed it and then what I still need help with. And if anybody out there wants to give your 2 cents that would be great.
Original Problem: In 100+ degrees I was loading my neighbors dump truck. It was taking 7 bucket scoops to fill his dump. On all loads, as I approached the truck I would raise the loader and rotate the bucket forward to keep it level until I was over the bed then I would dump and go for another bucket scoop.
On the 5th and 6th truck loads the loader would only raise 3/4 of it's full height and would sometimes go higher only if the bucket was curled all the way back and sometimes it would not go higher at all.
I was at 270 hours so I changed oil and filter since I had done a lot of loader work and I thought the oil could be foaming with that much work and with the weather so hot. The following week same temperature outside and same results from the loader on the 5th and 6th truck loads.
I put a 3000 psi gauge in the remotes and got 2375 psi. Next 100+ degree day I was moving pipe with the loader. I put the gauge in the remotes and it read 2100 psi.
So with the hydraulics hot and the gauge reading 2100 psi I decided to shim the relief valve to 2500 psi. The relief had two 0040 shims and four 0010 shims. I added one 0010 shim and got 2200 psi on the gauge. I installed another 0010 with no change. Another 0010 shim got a drop to 1500 to 1700 psi. I removed all shims and installed the original configuration of shims and still got the 1500 to 1700 psi. I started adding shims again, (this time without calipers in hand), and I started stacking them until I had to compress the spring on the relief valve to install it. When I energized the remote to check the gauge I heard a pop and that was the hydraulic pump case. Pictures below show that crack.
I put shims back to original configuration,installed a new pump and bought a new 0-5000 psi gauge.
Problem Now: Gauge at remote reads 1800 psi @ 2500 rpm. Loader and bucket move with same speed it has had since new. I have not tried to scoop gravel, but it moves and operates fine in that regard.
Questions Now: Could I have damage the relief valve early on when the gauge first dropped to 1500-1700 psi? Is there a port in the distribution block to test the relief valve? Does the manual state a minimum and maximum number of shims? In the online parts manual the relief valve shows a ball or cap separate in the cone part of the relief valve body. Mine is stationary is it suppose to be removable? Any help would be appreciated.
Thanks all,
Clay
Original Problem: In 100+ degrees I was loading my neighbors dump truck. It was taking 7 bucket scoops to fill his dump. On all loads, as I approached the truck I would raise the loader and rotate the bucket forward to keep it level until I was over the bed then I would dump and go for another bucket scoop.
On the 5th and 6th truck loads the loader would only raise 3/4 of it's full height and would sometimes go higher only if the bucket was curled all the way back and sometimes it would not go higher at all.
I was at 270 hours so I changed oil and filter since I had done a lot of loader work and I thought the oil could be foaming with that much work and with the weather so hot. The following week same temperature outside and same results from the loader on the 5th and 6th truck loads.
I put a 3000 psi gauge in the remotes and got 2375 psi. Next 100+ degree day I was moving pipe with the loader. I put the gauge in the remotes and it read 2100 psi.
So with the hydraulics hot and the gauge reading 2100 psi I decided to shim the relief valve to 2500 psi. The relief had two 0040 shims and four 0010 shims. I added one 0010 shim and got 2200 psi on the gauge. I installed another 0010 with no change. Another 0010 shim got a drop to 1500 to 1700 psi. I removed all shims and installed the original configuration of shims and still got the 1500 to 1700 psi. I started adding shims again, (this time without calipers in hand), and I started stacking them until I had to compress the spring on the relief valve to install it. When I energized the remote to check the gauge I heard a pop and that was the hydraulic pump case. Pictures below show that crack.
I put shims back to original configuration,installed a new pump and bought a new 0-5000 psi gauge.
Problem Now: Gauge at remote reads 1800 psi @ 2500 rpm. Loader and bucket move with same speed it has had since new. I have not tried to scoop gravel, but it moves and operates fine in that regard.
Questions Now: Could I have damage the relief valve early on when the gauge first dropped to 1500-1700 psi? Is there a port in the distribution block to test the relief valve? Does the manual state a minimum and maximum number of shims? In the online parts manual the relief valve shows a ball or cap separate in the cone part of the relief valve body. Mine is stationary is it suppose to be removable? Any help would be appreciated.
Thanks all,
Clay