Shoebox kinda failure - aka: crapage

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ctshooter

ctshooter

Member
Oct 30, 2018
4,487
2,746
CT, United States
Was topping off my 9L tank last night with my Shoebox which has been getting a workout since getting my Leshiy 2. There's been a light squeak coming from it for a while now, but last night I came down and the noises I was hearing just stank of something not good happening. Took it apart this morning to find the common wear part of the bushing on the small drive piece with the two bushings. 

Shoebox - 1.1604937758.jpeg


Thankfully the hole on the bar is still nice and round so I'll start looking around for a new bushing that will fit.

In the meantime I noticed the bushing on the right has almost no wear. I simply knocked out that bushing and replaced it in the location of the worn on. Then I took the worn bushing and placed it at the other end with the worn part to the top as it appears the stress in the motion is more side to side rather than up and down. Running smoothly for now.
 
Looks like this is the one:

For
Housing IDLg.Flange
ODFlange
Thick.Dynamic Radial
Load CapacityDynamic Thrust
Load CapacityLubricationTemperature
Range, °F Each

SAE 660 Leaded Bronze Bearings

For 1/4" Shaft Dia.

3/8"1/4"1/2"1/16"250 lbs. @ 120 rpm580 lbs. @ 120 rpmRequired-350° to 450°7815K11$2.88

Multipurpose Flanged Sleeve Bearing for 1/4" Shaft Diameter and 3/8" Housing ID, 1/4" Long
 
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Now why is it when something breaks there's always an assumption thrown out that the owner did or did not do something?

Unless Lithium grease on the bushing every 100 hours was the wrong thing to use, that bearing was well lubed. My take on it is that it wore on the outside edge and that is where the pressure would be at the end of each stroke. 
 
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That's still a pretty good run for an F10 at 400 hrs. Any other problems with it other than the bushings? Also, thanks for posting the dimensions and specs, let us know if it works out.
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Nah - the Shoebox has been one of my best investments. Basic maintenance performed - one major overhaul around 200 hours with the maintenance kit to replace everything. Only other "failure" was an oring on the high side check valve.

At some point down the road I will own an Alkin, but until that time I'd like this irreplaceable low-maintenance pump to keep running. I don't see why that wouldn't be possible as it seems nearly all the part can be found online.
 
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I guess what I meant by a pretty good run for an F10 at 400 hrs, was that there should be plenty of life left in it. I love my F10, so when I hear about 400 hours with minimal issues (I don't think a rebuild and bushings are too terrible) it makes me appreciate mine. I've only got about 6-7 hours on mine, but I have 6 rebuild kits, drive belt and some other spare parts. I don't shoot all that much and I also hand pump. Thanks for the reply Sean.
 
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If you have the rebuild kits you should be fine for a while. I never found a need to rebuild every 10 hours, that would be nuts. The o-rings should be good for 100 hours if you keep the pads lubed every 10. I did do a full rebuild at the first 100 hours with the plastic spacers, but they still looked brand new to me. Even at 300 hours when I did a full o-ring rebuild I didn't see any wear in the plastic spacers which were at 200 hours at that time. 
 
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Now why is it when something breaks there's always an assumption thrown out that the owner did or did not do something?

Unless Lithium grease on the bushing every 100 hours was the wrong thing to use, that bearing was well lubed. My take on it is that it wore on the outside edge and that is where the pressure would be at the end of each stroke.
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Don't be so thin skinned !!

It should have not failed ... Lubricated or otherwise. It it was lubed and the pin that rides within it allowed bearing to ride outward on it you have a BENT crank pin or the bracket it extends from is out of alignment or the rod itself does not have the holes that hold bearings in vertical alignment.

In operation the rod while under load ideally floats mid pin or is thrusted inward against the pins mounting boss. If rod / bearing is coming outward OFF THE PINS you have alignment issues.





Scott S
 
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hitech - one other thing. You may want to invest in the high pressure side oil/water separator filter. The Shoebox does tend to pass a good amount of the silicone oil all the way through. I learned only a few drops of oil on the felt pads every 10 hours. I was getting some water/oil in the bleed until I got a high pressure filter. Just some chinese one off ebay or amazon with a bunch of replacement filters, one every 100 hours. It takes a little longer to build pressure due to the air space in the filter, but my bleeds have been completely dry with no water or oil. 
 
Upvote 0
Now why is it when something breaks there's always an assumption thrown out that the owner did or did not do something?

Unless Lithium grease on the bushing every 100 hours was the wrong thing to use, that bearing was well lubed. My take on it is that it wore on the outside edge and that is where the pressure would be at the end of each stroke.
Click to expand...


Don't be so thin skinned !!

Never said you neglected lubrication, said it should not of failed so soon and to make sure it stays lubricated.



Scott S
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Scott - I like you. You are definitely a call it like it is person without beating around the bush. 
 
Upvote 0
Now why is it when something breaks there's always an assumption thrown out that the owner did or did not do something?

Unless Lithium grease on the bushing every 100 hours was the wrong thing to use, that bearing was well lubed. My take on it is that it wore on the outside edge and that is where the pressure would be at the end of each stroke.
Click to expand...


Don't be so thin skinned !!

Never said you neglected lubrication, said it should not of failed so soon and to make sure it stays lubricated.



Scott S
Click to expand...

Scott - I like you. You are definitely a call it like it is person without beating around the bush.
Click to expand...


Big sigh ... edited post above.



Trying to help really !!
 
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