Buzz or Rattle from pump

[tetomas]

I have a Spee Co log splitter with a 10 hp engine and a 16 gpm pump on it. I noticed the last few time I used it after the oil is warm I hear a buzz or rattle from the pump. The noise only occurs when there is no load on the pump, any call for pressure, splitter extend or retract, or log lift up or down all sounds good, when both valves are centered I hear the noise. Power has not fallen off, it will still split anything I ask it to, just the extra noise. I am thinking it could be the insulator on the lovejoy coupling, what say you? I should mention the splitter only has about 6 hours of run time on it, so for all purposes it is new.

 

[Soundguy]

check the spider.. might be wearing out.. also check for any loose fitting brackets. under load everything likely tightens up.. under no load you might get a lil bump n grind.

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