Seal CR 7475 replace

[Bar Nuthin 460]

I had a leak around the input shaft seal, so I thought no problem easy repair.

 

Well, I've went through my 3rd seal now and it appears that I'm damaging them when installing. I inspected the shaft and don't see any knicks or scratches. I'm wondering if I'm damaging the seal when I slide it over the splines.

It almost seems like the problem occurs when the seal transitions over the gap between the splines and the smoot section of shaft.

 

Any suggestions/tips from someone with experience? Thanks!

 

[squonk 41,291]

Wrap with cellophane tape

[ri702bill 8,479]

Is there, by chance, a wear groove in the shaft where the seal rides?? 

[Bar Nuthin 460]

28 minutes ago, ri702bill said:

Is there, by chance, a wear groove in the shaft where the seal rides?? 

 

Doesn't look like it when I wipe it clean. Can't really get in there to feel for anything I'll definitely take a closer look before I waste another seal.

[ebinmaine 68,205]

44 minutes ago, squonk said:

Wrap with cellophane tape

 

Yep.  

 

Get some cheap THIN packing tape.  

[lynnmor 7,352]

I'm seeing raised material along the splines that needs to be carefully filed down, plenty of dirt, possible wear groove and nicks in the aluminum housing.

 

[Bar Nuthin 460]

24 minutes ago, lynnmor said:

I'm seeing raised material along the splines that needs to be carefully filed down, plenty of dirt, possible wear groove and nicks in the aluminum housing.

 

 

Thank you. I will spend some time dressing everything down while I wait on new seals.

[pfrederi 17,856]

I put a speedie sleeve in one that had some wear on the pump shaft.  You can't tear off the lip after you get it in but that isn't necessary here.

 

 

[Bar Nuthin 460]

22 minutes ago, pfrederi said:

I put a speedie sleeve in one that had some wear on the pump shaft.  You can't tear off the lip after you get it in but that isn't necessary here.

 

I wasn't aware such a thing existed. I will see what I have once I'm done cleaning things up. Thanks for the info!

I see the sleeve number, but what is the "waste watcher 7474""?

Edited December 12 by Bar Nuthin
additional question

[pfrederi 17,856]

7474 is a single lip seal that will also work.  It is more likely to be stocked by distributors than the 7475 double lip.

 

 

[peter lena 8,716]

@Bar Nuthin  like a s/s  pot cleaner , for fine clean ups , might be a tiny  scratch causing issue  also like super lube , for metal / rubber sealing , that clear thin tape over wrap , would let you experiment with slide / fit seating , pete

[ebinmaine 68,205]

2 hours ago, Bar Nuthin said:

 

I wasn't aware such a thing existed. I will see what I have once I'm done cleaning things up. Thanks for the info!

I see the sleeve number, but what is the "waste watcher 7474""?

 

 

Speedy Sleeves are the best thing since sliced bread. 

[Bar Nuthin 460]

4 minutes ago, ebinmaine said:

Speedy Sleeves are the best thing since sliced bread. 

 

Yeah but, what was the best thing before sliced bread? 

[ebinmaine 68,205]

16 minutes ago, Bar Nuthin said:

 

Yeah but, what was the best thing before sliced bread? 

 

Nothing. Never. There was never anything good before sliced bread. Everything in the "pre-sliced bread" time period Was absolutely disgusting and drab and not worth being good.

[Bar Nuthin 460]

First pass of the file and ridges became quite apparent. I placed a fat o-ring over the shaft and a magnet just below the shaft to try and contain the metal filings. I'm Getting ready to follow up with a shop-vac.

 

I'm hoping that polishing the wear mark on the shaft with some emery cloth will get me by. I plan to go over it again with some 400 grit.

 

 

[lynnmor 7,352]

If you have a shaft collar, bushing, bearing or some other item with the correct size hole (.750" ?), you could use that to test the shaft size. 

[Handy Don 12,436]

On 12/12/2024 at 12:07 PM, ebinmaine said:

 

Nothing. Never. There was never anything good before sliced bread. Everything in the "pre-sliced bread" time period Was absolutely disgusting and drab and not worth being good.

And once they had the bread problem toasted, sliced hot dog rolls were a cinch. 

[WHX?? 49,129]

Someone care to skool me on speedy sleeve???? 

[ebinmaine 68,205]

3 minutes ago, WHX?? said:

Someone care to skool me on speedy sleeve???? 

 

It's a wicked thin metal sleeve that's driven on over a shaft where there's a groove.  

Repairs a worn spot.  

 

 

 

 

 

 

 

 

[Bar Nuthin 460]

43 minutes ago, ebinmaine said:

It's a wicked thin metal sleeve that's driven on over a shaft where there's a groove.  

Repairs a worn spot.  

 

 

 

The installation tool seems awfully shallow - and I'm guessing the Speedi-Sleeve is rather fragile.  Helpful tips (if it comes down to needing to use one)???

[oliver2-44 9,847]

Yes Speedy Sleeves can be fragile. But they work or are worth a try were other options require a lot of work, expensive shafts and $$. 

[ebinmaine 68,205]

8 hours ago, Bar Nuthin said:

 

The installation tool seems awfully shallow - and I'm guessing the Speedi-Sleeve is rather fragile.  Helpful tips (if it comes down to needing to use one)???

 

This is just one picture off the interwebs. The sleeves and tools vary in size. 

 

It's been a loooong time since I've seen one in actual use. 

A very popular usage years ago was the crankshaft of a road engine where the timing cover seal would wear a groove.  

 

These sleeves can be challenging to use. They MUST be installed on clean round correctly sized surfaces. 

 

Alternative driver tool might be a pipe or tube etc...

[Bar Nuthin 460]

Mail delivery this time of year

 

[Bar Nuthin 460]

On 12/14/2024 at 8:44 AM, Bar Nuthin said:

Mail delivery this time of year

 

 

 Round 3 about to go down!  The last attempt was so close! I couldn't actually see a leak and the seal area stayed completely dry. But when running the hydro, it had to be misting fluid, as the fan would blow it back onto the housing and after about 30 seconds you could see it build up enough to start to form a drip on the side of the housing.  I wish I had made a video.  I've since polished the shaft surface much nicer than in my last photo. Also put a lot more attention and inspection on the splines and outer rim of the housing. I also spent time on the leading edge of the shaft (yellow arrow), as this seemed to be a sticking point despite using cellophane tape and silicone lube to help with the transition. Lastly, I think I will go one step further and apply a thin coat of Loctite sealant on the rim of the seal.  

 

  

[Bar Nuthin 460]

6 hours ago, Bar Nuthin said:

 Round 3 about to go down!

 

So far, so good! Haven't really put it to any stressful duty but 15 minutes up and down the driveway with the blade scraping up ornamental pear/berries  - no visible leaks or fluid on anything!

I ended up using aluminum foil tape instead of cellophane tape to help with the transition from spline to shaft. I have to say it worked very well. I made sure I lubed everything before installing. I decided not to use any sealant on the outside of the seal.

 

FYI - the aluminum foil tape makes a great liner for the headlight buckets which is what I originally bought it for.