How often do you change your pump piston cups?

[joeynbgky]

Cat 290... my tm service schedule says to change piston cups every 1200 hours. One tm has 1751 hours on it. I have never done this. Does anyone do this as a maintenace practice?

I'm anal about maintenance btw

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[Giorgio]

4000 hours on on my Thermalwave and they've never been changed.

Pump works like a charm

 

[Johnny]

2286 hrs. on mine. Thought pump was going out last week. Would flip the pump switch off and back on and it would hold pressure for a few minutes, then drop to almost nothing. But it was the unloader valve. Replaced it in about 20 minutes.

 

[PCCN]

Cat 290... my tm service schedule says to change piston cups every 1200 hours. One tm has 1751 hours on it. I have never done this. Does anyone do this as a maintenace practice?

I'm anal about maintenance btw

Sent from my T-Mobile G2 using Tapatalk

Don't do it as a "maintenance" practice but I have rebuilt 2 of these pumps for my older Butlers. Very easy to do as long as you take your time and make sure everything is seated properly. Much cheaper than taking it to a service center plus you understand a bit better of how it works.