Sherwood pump help |
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Mpost ![]() Senior Member ![]() ![]() Joined: July-05-2018 Location: Monticello, MN Status: Offline Points: 329 |
![]() ![]() ![]() ![]() ![]() Posted: October-03-2018 at 8:23pm |
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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. ![]() ![]() 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. ![]() |
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84 SN Sold 98 SN Lund Pro V 1975 Alumacraft
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Duane in Indy ![]() Platinum Member ![]() ![]() Joined: October-26-2015 Location: Indiana Status: Offline Points: 1578 |
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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
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Keep it as original as YOU want it
1978 Mustang (modified) |
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Mpost ![]() Senior Member ![]() ![]() Joined: July-05-2018 Location: Monticello, MN Status: Offline Points: 329 |
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Gary,
thanks for that link. read the part for the G series and looks like I have to press the pulley off to get at the bearings. Just went out to the shop and confirmed that there is no set screw on the pulley. I will order the parts and get rolling on it when they show up. A picture is worth a 1000 words. I love this forum. So many people that like to fix things. ![]() |
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84 SN Sold 98 SN Lund Pro V 1975 Alumacraft
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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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. |
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Do not remove the pulley, their book is also wrong - they tell you to install the seal then put the C clips on- but then the seal is in the way. Assemble the bottom just as you took it apart. Never touch the seal surfaces either your finger oils will ruin them
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Duane in Indy ![]() Platinum Member ![]() ![]() Joined: October-26-2015 Location: Indiana Status: Offline Points: 1578 |
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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.
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Keep it as original as YOU want it
1978 Mustang (modified) |
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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After I remove the shaft and the C clips holding the bearings in I take a socket and start pushing the bearings out straight toward the plate just to get them broken free and moving
![]() Then transfer it over to the slotted plate to push them thru ![]() bead blasted housing ![]() Then assembly is the reverse ![]() |
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Mpost ![]() Senior Member ![]() ![]() Joined: July-05-2018 Location: Monticello, MN Status: Offline Points: 329 |
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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! ![]() |
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84 SN Sold 98 SN Lund Pro V 1975 Alumacraft
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Martin,
I'd say pressing off the sheave would be best to access the snap ring on that end but, you may also be able to get to it with an offset snap ring pliers? ![]() |
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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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. |
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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I cannot stress enough - Do not remove the pulley from the shaft,not needed,too hard to deal with,might break some thing.....
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KENO ![]() Grand Poobah ![]() Joined: June-06-2004 Location: United States Status: Offline Points: 10775 |
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KENO ![]() Grand Poobah ![]() Joined: June-06-2004 Location: United States Status: Offline Points: 10775 |
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As far as the installation tool you can cut a piece of sch 40 1 1/4 inch pvc tubing like Gary did or you can get a 1 inch pvc coupling at Pete's Depot
![]() Either one works equally well Here's a picture of my coupling for that purpose. |
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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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
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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The spare parts business is great for many companies and very profitable.. They charge upwards of 10 times or more say for bearings and seals compared to what you can get them for at a power transmission supply. It has kept many a company in the black during slow times. "Maintenance schedule" What's that? ![]() |
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Morfoot ![]() Grand Poobah ![]() ![]() Joined: February-06-2004 Location: South Lanier Status: Offline Points: 5313 |
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Probably cause you don't run any of them? Seems that you're always at Homey D or on CCFan! ![]() |
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"Morfoot; He can ski. He can wakeboard.He can cook chicken.He can create his own self-named beverage, & can also apparently fly. A man of many talents."72 Mustang "Kermit",88 SN Miss Scarlett, 99 SN "Sherman"
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Tim you know that one day of summer when the ice is finally out, August 13th only comes around once a year
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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The Fox River here by me is closed for high water. Again
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Mpost ![]() Senior Member ![]() ![]() Joined: July-05-2018 Location: Monticello, MN Status: Offline Points: 329 |
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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. But the other link with Gary's photos gives a much better picture for me to follow with the rest of the work. Since I'm going to be gone for 12 days maybe you guys will have it finished when I get back . 😂😂😂 I was amazed I did not find more posts on rebuilding a Sherwood pump, when I was doing searching yesterday. I just bought the boat this year with over 1170 hours on it, wondering if this is the original pump ![]() |
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84 SN Sold 98 SN Lund Pro V 1975 Alumacraft
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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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!
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Duane in Indy ![]() Platinum Member ![]() ![]() Joined: October-26-2015 Location: Indiana Status: Offline Points: 1578 |
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I had to make a new bearing housing for mine, same reason. Used aluminum on mine
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Keep it as original as YOU want it
1978 Mustang (modified) |
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KENO ![]() Grand Poobah ![]() Joined: June-06-2004 Location: United States Status: Offline Points: 10775 |
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Well like most things in life, there's usually more than one way to accomplish the job
![]() Here's a link to a Sherwood maintenance and repair manual loaded with info On page 29 you can find Sherwood's directions for disassembly and assembly of the pump link |
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Ken, Gary must not have seen those instructions since they do tell you to remove the sheave! ![]() ![]() ![]() ![]() |
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Duane in Indy ![]() Platinum Member ![]() ![]() Joined: October-26-2015 Location: Indiana Status: Offline Points: 1578 |
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You are correct. I had one pulley that ran out so badly that I had to bore the hub completely out and weld in a new hub and bore it to fit the shaft and set screw it back on. |
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Keep it as original as YOU want it
1978 Mustang (modified) |
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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They also tell you to replace the impeller every year too,so who you going to believe......... |
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DVskier ![]() Senior Member ![]() Joined: September-04-2014 Location: Seneca SC Status: Offline Points: 449 |
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Come on Gary you know Pete replaces impellers at 18 years whether they need it or not.
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man0seven ![]() Senior Member ![]() ![]() Joined: September-16-2018 Location: Utah Status: Offline Points: 122 |
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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. |
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2005 Ski Nautique
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Mpost ![]() Senior Member ![]() ![]() Joined: July-05-2018 Location: Monticello, MN Status: Offline Points: 329 |
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Nope . Burgandy and green and was able to ski for a couple months this summer with it PO did nothing himself and only owned it for 3 years.
I like to make things right so i don't worry about them. I never blamed my old man for breaking somethig tho. ![]() |
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84 SN Sold 98 SN Lund Pro V 1975 Alumacraft
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