Gentlemen,
I had a really bad experience trying get a AX300 pump covered by the 3 yr warranty. Simpson wants me to carry to a local warranty shop. Well that was a bust. First shop refused to take it as they were just too busy and only taking in mowers. They actually kicked me out (pointed me to the door) when I asked them to take it in. Never going to refer anyone to their shop again. Major A..holes. The second shop said they no longer handle Simpson warranties due to Simpson fail to pay for warranty done last year. I don't blame them as I would be doing the same. I drove over a 100 miles trying to get the pump covered.
Now this morning I tore down the pump to replace the water and oil seals and the oil. I found one water seal destroyed. The root cause is a defective piston. So I am going to be out over $100 to repair a $200 pump as I warranted to the customer. Apparently Simpson is a lousy company to buy from.
Personally I am never buying another Simpson pump because this warranty issue. The problem was cause by defective workmanship.