Nickel and Dimed: On (Not) Getting By in America, is a true account of the author’s experience, when as an experiment, she abandoned her city, her identity, education and professional qualifications for three months, and attempted to live on $7 per hour working as a Wal-Mart employee, waitress and maid in a new town.
As she soon discovered, it’s … Read more
One of the advantages of variable-displacement pumps with hydraulic or electro-hydraulic displacement control, or load-sensing control, is their low standby pressure. Meaning, when pump output isn’t required, the pump ‘stands by’ at a relatively low pressure, and usually at zero flow (other than that necessary for the make-up of internal leakage).
From an efficiency (heat-load) perspective the lower this standby … Read more
One of our members writes:
“We have a simple hydraulic system: pump and 4 double-acting cylinders. Most of the oil between the directional control valve and cylinders ‘shuttles’ back and forth in the lines without returning to tank. The manufacturer of the system, Rexroth, tells me there is never a need for ‘bleeding’ air from the system. How can this … Read more