LOUD iwaki, maybe bad?
Just got an iwaki from someone that bought it off of ebay. Don't think the seller knows its history. Its a MD-20RZ. 100v version. I got the 16-ohm 50w wirewound resistor and soldered it inline to the hot wire.
From what I can see it pumps fine. Dont have anything to give it a load just yet. Its just loud.
Put it in a loop with just a T line. Its not bled all the way. I think the O-ring might have been bad. When I first set it up and put it in a loop it seemed like it was sucking in air from somewhere inside the housing. I fill the loop and there'd be no bubbles I could see at all. i know there are going to be some in the housing for the pump head etc but every time I turned it on it seemed like more and more air kept coming out the outlet. So i replaced the O-Ring with some RTV sealant and that seems to have fixed that problem. I still have some verrry small bubbles in there that need to be bled but I dont think that small amount would cause this noise.
Comparing it to a mag3 it vibrates much less but is much much louder. Almost sounds like ball bearing chatter but coming from the pump head area. If I dismantle the pump (remove the head and the housing for the head so you can see the motor) can I turn it on? Want to see how just the motor sounds. Maybe someone ran it dry and did something to the head?
Or maybe I have to give the motor some lube or clean it?
When I replaced the o-ring I cleaned the head and the housing (fair amount of what I think was algea) and I didn't see any physical damage at all. no marks no cracks nothing. Looked really clean.
Other thing is the back that covers the capacitor is missing too =\ Guess I'll build a new one that will cover the cap and the new resistor.
Soooo anyone else that has a 20rz mind chimming in on how loud it is? Would greatly appreciate it.
|