Arimitsu 516 Oil Leak

[Kwiki]

Any one using Arimitsu 516 pumps that are leaking oil? Awesome pump, performs excellant, super quiet, easy to work on, just have an oil leakage weakness.

 

[mac]

I'v sold a few with no leakers so far. Where is the oil leaking from? The shaft seals are fairly easy to replace.

 

[Kwiki]

Looks as though the oil is finding its way out via each plunger rod from the case. Arimitsu has replaced the seals once themselves and also sent a short block. After 6 months the leaking repeats. Enough is leaking that over a period of sometime oil on the dipstick is below the Low point.

 

[MEP001]

There could be a defect in the case or a scratch on one of the piston rods, or there could even have been a problem with one oil seal from the factory and one replaced was defective. If it's still under warranty, let them fix it again and make sure they know that it's a repeat problem so they fix it right.