Posted on behalf of Frank Welch

I enjoy receiving the maintenance tips excellent information.

I have an issue with internal oil pump failures on a Sundyne pump.

If there is anyone that has encountered this problem please post details here.
Regards,
Frank Welch

Frank,
One of the main problems with these p[umps is the drive pin. Sundyne is using a cheap cotter pin, which is getting damaged during pump starts due to impact forces. I indicated this issue to Sundyne management about 7 years ago and they stated that I was the first one complianing about it. Many of my counterparts in different facilities throughout the US had the same issues. We corrected it by replacing these pins every time the gearbox is opened and adding auxiliary oil pump on auto start.

Yes, I also had this problem with cotter pin. Also I had once obserevd that the oil pump seazed due to improper air venting from the system. actually the vent was chocked and operating temerature was high.

Thanks for the reply. I also discovered the metallurgy of the pump shaft has changed. It is softer than the drive pins.