I have been trying to find some documentation on the consequences of excessively high pressures on plain sleeve type bearings, but so far I have had no luck. The case in question is a slow speed 133 rpm (150 Kw) reciprocating pump. The bearing lube oil pressure, which suppose to be 1.4 barg, is running at 6-8 barg, because of a damaged overflow valve. We are ordering a new valve, however we are currently running under the above conditions. If any one has some documentation on the consequences, please let me know.

The size of the bearing is important...the larger the better...if you have increased flow rate to this bearing, the oil looses it's ability to absorb heat, now this also depends on the load this bearing is taking.I have found that the oil will permeate itself with alot of air emulsion, thereby reducing lube film and characteristics...ie., viscosity.Try adding an anti foam agent to help the oil until you resolve the problem.

Try this information with the Bently-Nevada people at the GE website.