Rebuilding Sherwood Raw Water Pump

[Rock_Toy]

The bearings in my pump are wasted and I decided to rebuild rather than buy a new one. Downloaded the instructions from the Sherwood website but still can't figure out how to remove the pulley so as to get the bearings out of the pump housing. Anyone have a solution or answer for me?

[jward]

RE: Rebuilding Sherwood Raw Water Pump

You need to get a pulley puller. Take the pump to autozone. they will let you use one of the pullers that you can borrow. Takes about 2 min to take it off. If you borrow the puller and take it home you have to put up the money for the puller plus make another trip to take it back so I would just do it in store or parking lot. Also what kind/year boat do you have. I think on some of those pumps you need a press to get the bearings out. Good Luck, I heard that is not a fun job.

[Rock_Toy]

Its a 1996 Super Sport with the GT-40. I have a puller in the garage.....I'll tackle that tomorrow afternoon and update you on the rest. I'll take some pics as well in case anyone is interested.

[richard]

raw pump pully remove

it's a pain to remove the pully of the pump since the design is not for removable,I had remove 2 time since I change it with aliminium pully, I can't remove it with a puller,even the machine shop that make the alumi. pully for me, I drill 4 1/8" hole around the shaft ,and than have the chance to get the pully out by puller. carefully not shred the shaft but little bit touch to the shaft need. see pic. I suggest you take photo step by step for not confuse when assemble,one time I tried to rebuild the pump for leaking near the shaft,I change new one at final,I confused when assemble,also new pumpt give me peace of mine long time.

[jward]

RE: raw pump pully remove

Sorry Richard I just had a laugh on your behalf. While I was reading your post I was thinking I am going to ask this guy if he is Asian as a joke because of your wording, but then I saw the newspaper in your picture and decided to keep it to my self. Or did I?? Sorry it was just funny to me.

[Rock_Toy]

Alright, I just tried pulling that pulley with a pulley puller (that's a mouthful!!) and it wouldn't budge a centimeter!!! Nothing. I thought about heating up the pulley to get to expand with the puller on there but not sure if that' a good idea. I am about to just buy a new pump and get it over with, Anyone have any more bright ideas? Drilling the pulley is not an option as I want to reuse it.

[8122pbrainard]

RT, Is your pulley the same as Richard pictured? What typ of puller are you using? A 2, 3, or 4 arm and where are you grabbing the pulley? If you are grabbing it by the OD, you will get a lot of flex in the web of the pulley and besides not dong any pulling you may even distort it. I suggest a 3 arm through the 3 holes so you grab it close to the center hub. Yes, heat will help.

[Rock_Toy]

Yep, same pump and pulley. Here are pictures of the pulley puller on it. As you can see in the close up, it has bent the insides of the holes a little bit.....although I am sure that i will be able to hammer that back in. Being so close to the middle, it shouldn't really effect the operation of the pump or throw off the bearings. Guess I'll go an heat it up a little and see what happens.

[Rock_Toy]

OK, got the pulley off. That was NOT easy and I never want to do it again.....or think about getting it back on :mrgreen:

Here's the mess that came out of it. Look bad enough? I managed to get what was left of the bearings off the shaft and cleaned everything up.....but now I can't get the new bearings on. I just popped the shaft in the freezer and am going to warm up the bearings a little to see if that helps. If that doesn't help, I am assuming that I am off to the machine shop to get them pressed on, right? I'll post pictures of the progress along the way for those that ever think about doing this.

[TRBenj]

Remind me, why are you rebuilding the pump? That bearing looks like it had a lot of life left in it.

Where did you get the rebuild kit? Did it include everything pictured, including the impeller?

[Rock_Toy]

I bought the kit at go2marine.com. Cost me about $100. It included everything that you need, which is what you see.

Now I need to get it back together. All the parts that I will be recycling have been cleaned and painted and waiting to come together. Pump should look and feel better than new in a day or two. Stay tuned for pics.

[Rock_Toy]

BTW, I was running that pump on my boat last weekend. You think that may be why I was overheating? Personally, I don't think so but you never know....

[Miljack]

I'm contemplating changing the seal in my Sherwood pump, should I go ahead and put bearings in it while it's apart?

[jward]

I would think the only reason you would change the seal is because of an air leak. Take your pump off and put the palm of your hand on the discharge side then blow or suck on the intake side and see if you can hear a leak anywhere. As far as the bearings, the pully should spin smoothly. If all that is going on I would leave it alone.

[8122pbrainard]

RT, I think you need to go to the machine shop and use the press to get the bearings on the shaft. You can try chilling the shaft in dry ice and heating the bearing but om small bearings sometimes the method doesn't work. A press would have been a good choice to remove the pulley too. When you get the pump back on the engine, get a straight edge and check the pump pulley to make sure it's not distorted from the puller.

At least you got it off!!