A recent arrival on ‘Planet Brendan’ who works for Bosch Rexoth’s ‘Large Hydraulic Drives’ division in Sweden (a.k.a. Hagglunds division) wrote me this after reading my “6 Hydraulic Mistakes….” report:
“I would have liked more information on why you shouldn’t have filters on the drain line on piston pumps. We actually use that solution in our drive units and we … Read more
If you know something about load sensing hydraulic systems, the above headline appears to be a contradiction. After all, load sensing circuits match pump flow to actuator demand. And this is supposed to increase the hydraulic system’s efficiency. Not reduce it.
HOWEVER, under certain conditions a load sensing hydraulic system can be VERY inefficient. Let me give you a real-life … Read more
A repairer rebuilt a hydraulic piston pump. A week later it came back like a boomerang, the subject of a warranty claim. Upon tear down the piston retaining plate was found to be broken–see inset pic. Fearing the aftermarket parts they used were not up to scratch, the repair shop quietly accepted warranty and rebuilt the pump for a second … Read more