W
WCP
Guest
" Wanted to do routine off-sea
" Wanted to do routine off-season maintenance on a Sherwood bronze raw water pick-up pump from a 431 Chris Craft (change impeller, gaskets, etc.). No model number on the pump.
Disassembled the pump, and only found two bronze gears - no rubber impeller. Never seen one of these before. Without a tight rubber-to-metal seal, how does it form suction to draw water? What does one do to maintain this type of pump? Do the gears need to be replaced periodically? Where can one find parts?
Also, I noticed what appears to be a deep bottle-cap-sized threaded cap screwed to a protrusion on the back of the pump. I loosened it, and found it is full of grease. What is this for? Does it need to be repacked and periodically tightened to force grease into the gears? How often should it be tightened? How much? What kind of grease? "
" Wanted to do routine off-season maintenance on a Sherwood bronze raw water pick-up pump from a 431 Chris Craft (change impeller, gaskets, etc.). No model number on the pump.
Disassembled the pump, and only found two bronze gears - no rubber impeller. Never seen one of these before. Without a tight rubber-to-metal seal, how does it form suction to draw water? What does one do to maintain this type of pump? Do the gears need to be replaced periodically? Where can one find parts?
Also, I noticed what appears to be a deep bottle-cap-sized threaded cap screwed to a protrusion on the back of the pump. I loosened it, and found it is full of grease. What is this for? Does it need to be repacked and periodically tightened to force grease into the gears? How often should it be tightened? How much? What kind of grease? "