Tech doc discussion: Water Pump Seal/Bearing Replacement

Jarney said:
So depending on whether you have coolant or oil leaking out the weep hole determines which seals need to be replaced?
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Correct! If coolant is leaking it is the ceramic spring seal that is bad! If it is oil it is probably due to bad bearing pushing the oil seal out of place.
In Ohio I had a 35Ton press I used, no problems pushing with it. Now all I have available is a 15T and it struggles!
Like I said before, there are 2 sizes that were used for the ceranic "mechanical seal" the seals that Doc has available are the larger ones. I have about 6 pumps in a box that need the smaller seals!
If anyone on the board orders from McMaster Carr, PM me, I got a feelin....
 
Jarney...if you want to send your pump and parts to me, I can do it...I have access to a press...They are a piece of cake to do...

Willy
 
Ok, guys, thanks a bunch for all the info and the offer WillyD. I've found a local guy with a press that I can trust not to smash things to bits. So all I need to do now is get it off the bike and get all the parts - hopefully tomorrow or Saturday I'll have it off and can see what's what. Had a root canal today so not sure how I'll be feeling about doing much this weekend.

2 different size seals? Can they make things any more of a pain in the butt? hahaha. Keep us posted on sourcing all this stuff please.

The info and people on this site are just too cool. I probably wouldn't have attempted half of what I've done to my bike without this site and it's members. Thanks Mark and all the site members.

Thanks again guys. Later.
 
TA - FREAKIN' - DA!!!!!!!
Took about 30-45 minutes but at least the stinkin' thing is off. Now what? hahaha. So it has to be pressed apart now to get to all the goodies that need replacing? Thanks. Later.
 

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In your pic you can see the prop and the shaft there and at the other end of the shaft is a seal. You have to take that seal out to get to the c-clip that is on the shaft. You must remove this c-clip BEFORE trying to press out the shaft or you can damage it. Pretty straight forward with what you see in there.
 
I would check the shaft for play in the bearings...if that is all good and your coolant is not leaking and only oil, then it could be coming from one of two places...The outer O ring or the oil seal. The oil seal fits in the bore. The impeller has to be pressed off to replace the ceramic seal...

When I pulled mine apart (leaking oil only) The oil seal was kinda cocked in the bore. I had bought a used one (whole pump) off of a guy and it all felt tight (good)so I put it on the bike...In all honesty I think with mine (the original one) the seal was off from being straight in the bore..bearings tight, no play...Ceramic seal looked fine..I took some hi tack and kinda glued the oil seal in the bore so it will stay put...The inner lip of that seal is in perfect shape...I put a new outer o ring on it...and here it sits..I would bet money, it could go in a bike and be perfect...

Willy
 
Ok, thanks for the info guys. I'll take a closer look at things and see if I can get it a little farther apart today. I did check the impeller for play and really couldn't get it to move much at all. It actually was sort of stiff to turn - not sure if that's normal or not - I didn't figure it was supposed to just spin freely. Side to side and front to back felt good and snug though. Thanks. Later.
 
So I got the top seal out - like the one in the first pic of the tech doc. Under it was a thin metal piece with rubber on it - dust cover or another seal (?) - it came out fairly easy so I didn't butcher anything as far as I know? And now all I see is a bearing - and it doesn't appear to be a sealed bearing. I don't see a snap ring or even a groove for one to fit into either. Do the snap rings look like the standard style with the eyes on the ends? Is it an inner or outer snap ring? So do I have a different style pump? Is it ready to be pressed apart? Am I missing something - parts or otherwise? Sorry for all the questions. Thanks. Later.
 
I never saw a snap ring on my pump...I set my pump up on a vice and carefully used a brass punch and a hammer and drove the shaft down so the impeller came off...I then looked at all the pieces and determined everything to look and feel ok...I then put it back together...I used a socket on the impeller to tap it back down in place...I did not see that second seal you are describing...

Willy
 
Jarney,
I can't remember the details of the snap ring but I did add that to the tech doc since I skipped that part of it when I took the picture. It's either a internal in the bore or external on the shaft. After the seal is out you have to remove the snap ring to get press the bearing out.
 
Also when you look at the tech doc pics with the pics of the bad bearing, you won't know it's a bad bearing until the impeller is out and the mechanical seal is out. With the impeller out the coolant side bearing(rusty one in pic) isn't visible
 
Ok, thanks WillyD, evidently there are two different setups on these then? Some with the snap rings and some without - or is it the 1000 that has the snap ring? I'll see if I can get mine apart then. Thanks guys. Later.
 
Ok, here is what little info I have found out about these things from screwing around with them in the shop today.

Dug out another pump and it happened to be the other size. There are numbers on both sides of the pump housings. There is about 1/8 inch difference in the seals and the bearing that comes out that end. The numbers on the housings are 990 .1 and 990 .2 or 1. 990 and 2. 990 (for some reason they are sort of random in the format) and there is a symbol between the 990 and the other number that looks like an eagle. The ".2" 's use the smaller seal and bearing. The .1 has the snap ring and sealed bearings. The .1 came apart pretty easy. I can't get the .2 apart so I'll have to wait until I can get it to the guy I know with a press and see if the inner bearing in it is sealed or not - the outer one is not sealed. The inner bearings and mechanical seals on both "models" appear to be the same size although I should probably double check that. Other than that one seal and bearing they appear to be identical.

Man what a pain. Especially to find and figure out what parts a guy would need depending on which "model" he has. Wonder what the reasoning was for the change?

Here's a pic of each seal side by side - not a good pic but I think you can see a difference in the size.

Later.
 

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I'll take mine apart again and take pics of all the different parts. There must be 2 different versions of this because mine does have the c-clip on the shaft. I would need to get a sample of the other one (without the c-clip) to get all the related parts for it.
 
I took one apart today (from a 1000). As Jarney stated, mine is marked 990 .1, and has a clip on the shaft.

I searched for the mechanical seal on the internet, but all the dimensional data was too much for my feeble mind to comprehend :icon_scratch:

I did come up with some Kaw p/n's - I'll bet 49063-1056 is it, though I could not verify it. If anyone is buddy-buddy with their Kaw dealer, maybe could get them to order one just to check. -1055 and -1057 were two others I came across. One of these has to be it.
 
kawboy said:
Could this have been the bearing grease seal?
Click to expand...


That's possible Kawboy.

I didn't do a real accurate measurement on the seals and just checked them in inches - the smaller one was real close to 1 inch and the larger one is about 1 1/8 inch.

Below are a couple more pics. The first one is the "1" or larger pump with all the parts laid out in order. The second pic is the "2" pump I don't have apart yet but here is what I have out so far - just the seals.

I'll go out later and take a closer look and write down any numbers I see on stuff and see if that helps - maybe try and take some more measurements. Later.
 

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