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Restoration & Repair Tips Board

rust removal

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packratt

07-03-2005 21:18:37




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I"m in the middle of rebuilding an old Mohawk bush hog. Actually just had to make new skirts and skids for it.

Since I now have all that nice pretty metal I decided I should clean up the rest of it and put a coat of paint on it.

I started out covering it with naval jelly with poor results due to the thickness of the rust. I then started grinding through the rust with the angle head and finishing up with sanding disks on the die grinder. For the parts that are too odd shaped for the power tools I"ve been liberally applying the torch and burning the crap off. Then coating with naval jelly with much better results.

I"m now down to the gear box. Any suggestions on a quick way to get the bulk of the rust off before jellying it. I don"t think torching it would be a good idea. At the present time sand blasting isn"t an option.

There is actually a layer of paint under the rust. Until I got to grinding the rust off I never new it was supposed to be red.

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Dan

07-05-2005 08:30:52




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 Re: rust removal in reply to packratt, 07-03-2005 21:18:37  
I have an old Mohawk brush hog mower I have been trying to replace the top gearbox oil seal for quite some time now. Since you are fixing yours up, do you know how to get the PTO shaft off the gearbox so you can pull the top cover and replace the oil seal? I have removed the pin that goes through this shaft, but cannot get the PTO shaft removed.

Thanks,
Dan



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packratt

07-05-2005 19:23:58




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 Re: rust removal in reply to Dan, 07-05-2005 08:30:52  
Didn"t need to tear it down that far.It was just sheet metal replacement. Mine has a clutch inline with the PTO which bolts to the input shaft of the gearbox like a pinion yoke on a differential.

You"ve probably done the right thing just it"s frozen to the input shaft. Keep soaking it with PB blaster and it might come free. Also post over in the Implements forum, someone may know more over there.

Le

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RustyFarmall

07-04-2005 14:55:18




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 Re: rust removal in reply to packratt, 07-03-2005 21:18:37  
Go to your closest Northern tools store and get a needle scaler, runs on compressed air, makes real short work of removing layers of rust and paint. Once you have one of these you will wonder how you ever got along without it.



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JoeOH

07-08-2005 20:00:12




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 Re: rust removal in reply to RustyFarmall, 07-04-2005 14:55:18  
Agree 100% Rusty. Just got done using my needle scaler on a Ford 730 loader frame today. Saved me hours in wire brushing time. A Navy vet told me a few years back that that's what they use onboard ships to clear scale rust before repainting. I swear by it now.



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packratt

07-04-2005 20:46:47




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 Re: rust removal in reply to RustyFarmall, 07-04-2005 14:55:18  
The needle scaler wouldn"t have worked, not enough room to get into all the corners.

I got lucky and the gear box cleaned up easier than everything else. Sanded down everything I could with the die grinder. Coated it down with Naval jelly then scrubbed with a small wire brush. Then when I had gotten everything I could get to by hand chucked a 1" cylinder wire brush in the die grinder and got everything else that I could.

The deck and gear box didn"t get cleaned up as well as the other parts but the paint job will last as long as it does and I"ll do a better job when I"m not pressed for time. I had to have it ready to paint tonight so I could load it tommorrow night.

Thanks
Le

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