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Catalina 34s Parts & Pieces For Sale or Wanted / Re: WTB - Sherwood G908
« on: August 05, 2021, 08:42:53 PM »
PM'd. I'm interested depending on what the pump face looks like.
Thanks
Thanks
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Catalina 34s Parts & Pieces For Sale or Wanted / WTB - Sherwood G908
« on: August 01, 2021, 10:04:59 AM »
Good morning,
I'm looking to purchase a rebuildable core for a Sherwood G908 raw water pump.
Thanks for your consideration,
Ray
I'm looking to purchase a rebuildable core for a Sherwood G908 raw water pump.
Thanks for your consideration,
Ray
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Main Message Board / Re: need an expert of late sherwood raw water pump
« on: March 09, 2019, 11:12:27 AM »
Hello,
I've rebuilt a couple G908's but am no expert.
You are correct there are 2 hard faced seals held together by a spring. One seal base is press fit into the bearing housing and the other is pressed onto the pump shaft. The seal on the pump shaft is friction fit to the shaft and nothing but friction and hope hold it together. Truth is there is very little force on the seal when the pump is together so there is nothing wrong with the design.
That said these seals are difficult to install. They are a hard face with a rubber gasket over the shaft. It's easy to crack the seal when pressing in place or damaging the rubber inner gasket when it slides over the shaft. I made a special tool to hold the seal square to the shaft. Then debur the woodruff key slot on the shaft and use a special assembly lubricant. The lube helps the rubber slide on the shaft without damage but then bonds the seal to the shaft.
Good luck,
Ray
I've rebuilt a couple G908's but am no expert.
You are correct there are 2 hard faced seals held together by a spring. One seal base is press fit into the bearing housing and the other is pressed onto the pump shaft. The seal on the pump shaft is friction fit to the shaft and nothing but friction and hope hold it together. Truth is there is very little force on the seal when the pump is together so there is nothing wrong with the design.
That said these seals are difficult to install. They are a hard face with a rubber gasket over the shaft. It's easy to crack the seal when pressing in place or damaging the rubber inner gasket when it slides over the shaft. I made a special tool to hold the seal square to the shaft. Then debur the woodruff key slot on the shaft and use a special assembly lubricant. The lube helps the rubber slide on the shaft without damage but then bonds the seal to the shaft.
Good luck,
Ray
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