Wood Rotary Cutter Oil leak Question: Field Mowers Brush Cutters  -- Tractor Attachments Implements 3ph Discussion Forum and Review Wood Rotary Cutter Oil leak Question: Field Mowers Brush Cutters -- Tractor Attachments Implements 3ph Discussion Forum

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 06-08-2008, 15:04 Post: 154393
sprobst



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 Wood Rotary Cutter Oil leak Question

I have a Woods Rotary Cutter that has a recurring problem and I'm not sure how to handle it. The lower oil seal fails ever few hours of use. This has happened twice. The dealer replaced the seal about 6 mowings ago (2 years ago) and now the seal is bad again because the gearbox oil gushes out of the bottom of the mower. This isn't a small leak but a complete seal failure because the oil leaks out of the bottom as you are filling the gearbox at the top.

Can anyone tell me why this seal would be failing multiple times? Is it being installed incorrectly or could there be something involving the drive shaft that would cause it to fail? I am not hitting fencing or wire so I do not think that is the cause.






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 06-08-2008, 18:36 Post: 154399
candoarms



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 Wood Rotary Cutter Oil leak Question

Sprobst,

I believe the seal is only a small part of the overall problem.

Your bearing is probably bad. While you're checking and replacing the bearing, be sure to check your blade for correct balance. An unbalanced blade can quickly destroy the bearing. Finally, use some fine grit sandpaper to polish up the shaft before inserting the new seal.

Joel






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 06-08-2008, 20:28 Post: 154402
earthwrks

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 Wood Rotary Cutter Oil leak Question

I'd check the shaft for run-out--a bent shaft would cause premature seal failure. Also, verify that the gearbox vent is free to atmosphere--a clogged vent would prevent trapped air to expand and possibly pop the seal lip enough to allow the drip-through you speak of.






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 06-09-2008, 08:16 Post: 154414
kthompson



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 Wood Rotary Cutter Oil leak Question

Quote:
Originally Posted by earthwrks | view 154402
I'd check the shaft for run-out--a bent shaft would cause premature seal failure. Also, verify that the gearbox vent is free to atmosphere--a clogged vent would prevent trapped air to expand and possibly pop the seal lip enough to allow the drip-through you speak of.



If you way over fill the greabox the oil when heated will not run out the vent as air can and also blow the seal. As the saying goes...been there on that one. kt






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 06-09-2008, 08:29 Post: 154416
earthwrks

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 Wood Rotary Cutter Oil leak Question

Kenny I'm sending you a box of commas and a spellchecker. IgottareadyourpostsaboutfourtimesbeforeIgittherealmeaning.

EXACTLY! Laughing out loud You ole redneck






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 06-09-2008, 12:26 Post: 154429
kthompson



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 Wood Rotary Cutter Oil leak Question

Jeff, I do what I can fer you ole boy. Glad to lighten your day. kt






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 06-09-2008, 12:29 Post: 154430
sprobst



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 Wood Rotary Cutter Oil leak Question

Thanks for the great replies. I will let you know if it's one of these underlying problems.






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 06-09-2008, 13:15 Post: 154432
Murf



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 Wood Rotary Cutter Oil leak Question

Quote:
Originally Posted by kthompson | view 154429
Jeff, I do what I can fer you ole boy.



I can hear Charlie Daniels playing just reading that sentence. Laughing out loud






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 06-10-2008, 16:00 Post: 154468
sprobst



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 Wood Rotary Cutter Oil leak Question

I believe I am going to attempt this oil seal replacement myself (if I can get the crossbar and stumpjumper off). I will likely replace the oil seal and the bearings (just to be sure).

How can I tell if the blades and stump jumper are in proper balance? I do know (that during operation) the deck shakes very slightly but not much. I considered that normal. I assume that buying new blades would ensure proper balance, unless the stump jumper has some deformity to it.






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 06-11-2008, 09:25 Post: 154492
kthompson



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 Wood Rotary Cutter Oil leak Question

Looking at the design of the stump jumpers I have seen there is no way I would expect them to be perfectly balanced. Never have noticed a balance weight on one either. But have not seen all brands by any measure.
Same for blades, if they were to be balanced would they not have to sell them in pairs?

If you don't notice one blade being broken or two different sizes or the stump jumper being damaged to me it probably is going to be something else. Of course you could remove the baldes, run the cutter, and if it still vibrates then the stump jumper. Howeve just because the vibration were to stopped does not totally mean it is not a bad bearing which stopped due to load being off of it or a bent shaft. Also it could be your PTO shaft.

Then the most simple, you don't have a pile of dirt on one side of the stump jumper top (if the dished type) or wire wrapped around a blade? Do realize you have this to happen twice so doubt this.

Another simple problem for vibration at load RPMs could be your blades are requiring full rpms to spin out in the full cutting position. Wire or sting or even rust can cause this. kt






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