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Originally Posted by pHaestus
I don't think that will affect the MTBF too much personally as the wearing out of brushes seems to be the cause for 4-6month life span. Don't know why you's spend a lot of energy making a pump leakproof that you know is going to die in your rig shortly...
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I was going to bring that up, but since you beat me to it...
How does this pump fail? How does it "die", and what can anyone do to extend its life?
All I can think about, is how the manufacturer recomends the installation to be either horizontal, or "motor side up". I have to assume that it's meant to prevent water from flowing into the motor compartment.
Does a bearing seize, and the motor burn out as a result? Wouldn't the fuse (from the proposed support circuit) prevent it from burning out?
The only hint I've seen so far is that the brush holder (made of nylon) melts under extreme heat, so would some dielectric grease work, and if it does, how much longer can one expect this pump to live?