Sherwood pump help

Sad to say but the 1998 SN is put away for the season. Was 42 yesterday, 80 today and high of 40 tomorrow.
What a roller coaster. I could use some help with my RWP. I opened it up today to clean it up and repaint it, and have it ready for the new impeller in the spring. Bearings are noisy so I would like to replace them before the freeze up like my 84 2001 did on me 13 years ago.
Of course then I think it only cost me $150 bucks for a whole new pump. Not today
Anyway the first problem is the tag telling me the model of the pump is gone. Only the part left under the bolt is there. Can anyone tell me from the pictures what the model number of this pump is?



Second is while trying to disassemble the pump to get at the bearings and seals I have run into a roadblock. It looks like there is a metal cup that needs to come out but I do not know how it comes out. Also the spring with the rubber bellows will not come out either. ????


An illustrated parts breakdown of the pump would really help me but have not been able to find anything being as I don't know the pump model. I know the rebuild kits are available but again what kit number without a model number.
Thanks for any input I can get here.

Without the proper assy tool it is VERY easy to break the carbon seal. It has a carbon ring sealing against a ceramic ring. Be very careful

Your going to run into other road blocks as you go too. I made a crude jig to remove the bearings with my press. Removing and installing the shaft/pulley is the hardest part followed by removing the bearings from the housing only because the housing is dirty and rusty,they will reinstall by hand,shaft and pulley need to be pressed back thru the bearings

Do not put any force on this end it will break



This is what I made to push the shaft out and how it sits in the press.



I'll keep looking for pictures,photobucket is not cooperating.

Most of the ones I've worked on,the pulley is a "shrink" fit. Meaning they freeze the shaft and heat the pulley. Good luck removing it   I like the keyway and set screw approach but some backyard hack engineers decided they could save a few $$ by eliminating that operation. Engineers should have to work on some of these ingenious inventions they come up with. Good reference is the inverted oil filters.

Thanks for all the suggestions and pictures. I have a press so should not be a problem.
Gary, how do you get to the snap ring at the pulley end without removing the pulley. With the retaining rings on the shaft and the ones on both ends of the bearings the shaft wont come out of the bearings, will it????
Ill be out of town for 12 days so will have to wait until then to dig into it.
Thanks!

Once you do one you'll be amazed at how easy it is.

When you get the seal out you will be able to reach in and remove the snap ring that holds the shaft in



Ignoring that the seal is in place in this picture,you then just push on this end of the shaft. When you get even with the pump base with the press I used a 3/8 extension to push the shaft through the bearings until it's out.



You will end up with the pump housing in one hand,the shaft with the pulley still on in the other. Then you can remove the snap rings holding the bearings in place and press the bearings out. You can then replace the snap ring on the shaft also-



Can't find a picture yet but when you are reassembling and get to where the seal goes back in, I used a piece of plastic electrical pipe to use as a spacer to push the seal into place.

Here's a recent thread with more pictures from Gary and lots of discussion about the pump

link

Thanks Ken. I'm really surprised these questions don't come up more often. Sherwood recommends a major service like this every 4 years, 2 if severe service like high rpm. No one following maintenance schedules   

8122pbrainard wrote: "Maintenance schedule" What's that? I'm still running the original bearings and seals on the 54, 64 and 77!!

Probably cause you don't run any of them? Seems that you're always at Homey D or on CCFan!

The Fox River here by me is closed for high water. Again been a bad year for boating

Mpost wrote: Wow Now I wish I had not popped the shaft out of the pulley last night. Came out without a problem on my press and no damage to the pulley. So I think with a little heat and cooling I'll be able to get it back in when I'm done.

Martin,
You did good. Don't worry about getting that sheave back on the shaft. Gary's just paranoid because he breaks things in the press!

Gary S wrote:

Gary S wrote: I cannot stress enough - Do not remove the pulley from the shaft,not needed,too hard to deal with,might break some thing.....

I had to make a new bearing housing for mine, same reason. Used aluminum on mine

KENO wrote: On page 29 you can find Sherwood's directions for disassembly and assembly of the pump link

Ken,
Gary must not have seen those instructions since they do tell you to remove the sheave!

8122pbrainard wrote: E] Ken, Gary must not have seen those instructions since they do tell you to remove the sheave!

They also tell you to replace the impeller every year too,so who you going to believe.........

Mpost wrote: Wow I just bought the boat this year with over 1170 hours on it, wondering if this is the original pump

Any chance you bought it a couple weeks ago and it is teal and white with a tower?
I saw one like that your way just a little while back.