On a fixed displacement pump the flow has to be there regardless of hose sizes unless the suction side if gulping air along with fluid. Tubing and hose sizes will affect no load pressures is all. How big is the reservoir and is the pump below it for good flooded suction?
Reservoir is 15 gallons. The pump is well below fluid level.
Your comment about it gobbling air gave me an idea that I'll try this afternoon. I don't have the reservoir completely full (about 11 gallons) and I had the shop weld a perforated baffle plate into it between the return and the intake. If the fluid is not passing through the baffle fast enough, I might have a high fluid level on the return side and a low fluid level on the intake side resulting in the pump getting some air. Air in the line might account for the return line jumping like it does. I'm going to fill it full and try it again. I forgot that I hadn't put those last few gallons in.
Edit... it took more than I thought it would. It took all of my remaining 5 gallon jug. I wanted to crank it, but I have neighbors now and the splitter running at 5:15am might not sit well with them. This means that I have right at 17.5 gallons in the system. Tank and lines hold more than I accounted for.
:agree2:
I think you might have gotten a cobbled pump... take it apart and measure the gears. Then compare that to the specs for the pump...
That's still pretty respectable cycle time though... that machine will still likely wait on you more than you will wait on it.
I emailed Haldex to see if they offer any pump services and if so how much a repair would be. Before I did that I would take it to the Hydraulics shop to see if they had a flow meter that they could test it with.
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