Help identifying Gearbox?

[kabar53]

I am looking for some help identifying a gear box that came off an old brush cutter (see pics). I am needing to replace the seals and get a new key stock for the shaft. The numbers 1500092 are on the case but not finding anything from an internet search. I was told that the cutter came to the farm in the 1950's with a Ford tractor. I greatly appreciate any assistance with identification, parts, tips on rebuilding.

 

[Jerry Coulter]

The only gear box I ever saw with a slanted back side like that was a genuine Bush Hog.

 

[Mark-Ia]

Look for a number on the seal. Take the seal out and go to a parts store. Any good parts store can measure and get a seal to fit your gearbox. Key at a hardware store.

 

[Richard G.]

I have one just like that on a table in my shop.
Came off an old 5 foot Bush Hog 105 I think.
I rebuilt the gearbox and never used it.
Untitled URL Link

 

[kabar53]

Thanks Richard G. this helps! Any recollection where you purchased the internals from for the rebuild?

 

[caterpillar guy]

For get the seal just put cornhead grease in it and go no need to replace a seal that will probably leak again due to the wear in the shaft. Bearings would be able to be sourced from any bearing supplier and cornhead grease is about the cheapest from Deere ,Agco ,OR Fiat. Seals can be had from same place as bearings.

 

[Richard G.]

I got the seals from a Bush Hog dealer.
The Bush Hog number is 1008BH.
I bought 2 to put in the output shaft and 1 for the input shaft.

Messicks website shows they have them.

 

[560Dennis]

Inspection of the shaft surface where the seal rides , if wear and corrosion in this area is beyond the limits of the seal design it will leak.
Pitting from corrosion will be the most common cause of seal failure. Option is polish shaft with fine extra Emory cloth . Or a sleeve designed to the shaft repair if a lip type seal.
Corn head greases are a worthy suggestion you should consider also. New Holland store has a gear guard in quarts . Take a while to load it in but cost less that the other options.

 

[Richard G.]

Fortunately that gearbox has room for 2 seals on the bottom.
If polished up a bit, it will seal.
I agree on the corn head grease.

 

[kabar53]

Update: I got some cornhead grease and sourced the two seals and key locally, but I found a bigger issue when I disassembled the gearbox. The lower shaft and retaining nut threads are boogered. Looks like it came loose while in use. I don't have a tap and die set that big. I found the retaining nut online, but can't find the shaft. Any suggestions?

Richard G. are you interested in parting with that gearbox?

 

[wp6529]

(quoted from post at 11:38:17 05/29/23) Update: I got some cornhead grease and sourced the two seals and key locally, but I found a bigger issue when I disassembled the gearbox. The lower shaft and retaining nut threads are boogered. Looks like it came loose while in use. I don't have a tap and die set that big. I found the retaining nut online, but can't find the shaft. Any suggestions?

Richard G. are you interested in parting with that gearbox?
<img src=https://www.yesterdaystractors.com/cvphotos/cvphoto155560.jpg>

Looks easy enough to rebuild that section. I expect you can find a suitable die cheap enough, perhaps on ebay, or it could be cut on a lathe.

Projects like that are the excuse to expand your tooling... I can buy a new gearbox for $ but I could also buy the tooling needed and then be able to rebuild this gearbox as well as the next and the next...

Seems shaft available as a complete assembly:

61666 NO 32 SHAFT KIT $400.17

Not sure the thread size, but assuming something like 1"-8 even McMaster has dies for $60. Or $400 is a nice bit towards a used lathe...

The thread size is actually listed:

JAMNUT 1-1/4 NF LH .578/.675

McMaster doesn't list that big, MSC seems to have an overpriced rethreading die:

https://www.mscdirect.com/product/details/79771358

Seems like cutting on a lathe would be most economical.

This post was edited by wp6529 on 05/29/2023 at 11:45 am.

 

[560Dennis]

Lets see a close up of shaft ?
I use a lathe and and recut the threads.
I use a triangle file to recut threads .
Measure thread diameter , cheap four flute taps can recover nut .
Thread dies could be purchased .
Im sure your shaft can be saved , but I would need to see close up to confirm .
How is the key way ?