Mower gear box seal

/ Mower gear box seal #1  

wyeguy

Gold Member
Joined
Jun 29, 2012
Messages
396
Location
Bartlett, Iowa
Tractor
Ford 1100
I got a compact Ford 1100 with a bunch of implements including Ford 938 mower. This was all from an estate. Everything is in real good shape, just hasn't been used for awhile and never used much at all. I was checking/filling the gear box on the mower, and pretty much everything I put in it ran out underneath the mower. Does the marvelous mystery stuff work to help with a dried up seal? I'm guessing the seal can be replaced? Be quite a job for my limited facilities. Thanks.

I am the modern man...my smart phone smells of diesel & grease.
 
/ Mower gear box seal #2  
Maybe there was a small amount of water in the gear box and it froze and pushed out the seal.
 
/ Mower gear box seal
  • Thread Starter
#3  
I did not even know that could happen. But it gets cold enough here it sure could have happened.

I am the modern man...my smart phone smells of diesel & grease.
 
/ Mower gear box seal #4  
Chances are either the seal or the output shaft are damaged. Either way you're going to have to replace the seal. The best fix would be to go to a bearing shop and have them to measure it up for a Speedi sleeve. It's a very thin stainless steel collar that fits tightly around the shaft and gives the new seal a smooth surface to seal against. They're pretty easy to install and work very well. Being stainless it'll last for a very long time.
 
/ Mower gear box seal
  • Thread Starter
#5  
Thanks Al. I'd really rather do this once, and your advice will help me do that.

I am the modern man...my smart phone smells of diesel & grease.
 
/ Mower gear box seal #6  
pull the gear box and seal. If you can make out a part # on the seal write it down. Feel the shaft with your finger nail if the seal has worn a grove in the shaft then you will probably need a sleeve.

If you can't make out a seal part number, take your calipers and measure the bore of where the seal fits, the OD of the seal, the thickness of the seal, and the shaft size, all down to the thousandth. An then that info can be used to find a new seal.
 
/ Mower gear box seal
  • Thread Starter
#7  
Sounds like if I can get the rusted parts loose I'll have the hard part done. I'll look for numbers etc and see what I can get done. Thanks again!
 
/ Mower gear box seal #8  
yep, ID, OD, thickness and most seals can be matched.
 
/ Mower gear box seal #9  
Here is a picture of your gearbox from Case/New Holland.
Ford 938 Rotary cutter.gif

Here is the part number for the proper seal, if the shaft seems to be OK. BMB1082 Dealer pages list it as just under $24.00

If gear oil literally ran out the bottom, I'd be suspicious of the bearings on that shaft. Who knows how long it has been that way.
 
/ Mower gear box seal
  • Thread Starter
#10  
Yes, it pretty much runs right out. I'm fairly sure it was not abused & hardly used. The old fella that had it had a large yard in town. Not any rock roads around or deep grass/weeds with hidden obstacles.
 
/ Mower gear box seal
  • Thread Starter
#11  
Thanks for the diagram & parts info. Blows my mind how helpful folks are on this site. Its like a breath of fresh air!
 
/ Mower gear box seal #12  
Hopefully the bearings are good and tight. I have seen a piece of twine, or long grass get wrapped around a shaft at the seal, and take it out in short time. Something to keep an eye on, on your tractor too, if you happen to be mowing tall grass. It will at times wrap around the PTO shaft.

For your Ford/New Holland equipment, you can go here: New Holland - Choose your brand

Place your cursor on Agriculture at top right, then slide down to North America left center bottom. It will turn yellow, then click on it.

On the next page that appears, click on "Parts and Service".

On the next page that appears, scroll down to the second paragraph, and click on "New Holland parts search"

On the next page that appears, type your model number in the white block, then click on search. It will have a menu with selections to the left. Select the proper model, and click on it. It will give an exploded view of what you selected, by component. Diagram with numbers, and corrosponding part numbers.

Pretty simple to use, once you use it a couple of times. You can also copy and paste that part number to Google, or similar search engine, and find the price, of aftermarket parts too.

I usually copy and paste to Messicks ( a sponsor on here) who handles more than several brands I have, to compare dealer price, to aftermarket. And a lot of that depends on the particular part I'm looking for. There are certain items where I prefer OEM parts.
 
/ Mower gear box seal #13  
give the output shaft a wiggle. if it's loose.. inspect bearing and retainer. if not loose and shaft not worn.. then sound slike a 24$ seal and 8$ of gooey stuff.. :)
 

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