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Operating the Hydraulics on 8N.

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Ralph Ledger

11-28-2005 10:10:08




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Folks:
I"m the new owner of a 1948 8N. I have a brush hog on the back but can"t figure the operation of the lift arms on the 3 pt hitch to save my life. She wants to drop or cycle regardless what I do with the controls. Is there a position where she locks? I might need to rebuild if she"s leaking down on me.
Thank you for your expertise.

Ralph




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Dell (WA)

11-28-2005 11:31:37




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 Re: Operating the Hydraulics on 8N. in reply to Ralph Ledger, 11-28-2005 10:10:08  
Ralph..... ...you do know that yer hydraulic lift is powered by yer PTO lever don't you? So iff'n ya turn yer PTO lever OFF because yer worried about yer brushhogg blades swinging, guess what? yer hydraulic pump gitts turned off too. Guess what won't happen iff'n yer hydraulic pump ain't pumpin?

All 8Ns have a little lever under yer buttbuckett. It ain't fer flushin'. Its the position control hydraulic lever. Horizontal for plowing. Vertical for position control like brushhoggin'.

I'm gonnna assume you have checked for 5-gals of hydro-tranny oil on yer dipstick, haven't you? Lack of enuff oil will cause yer hydraulics to "bob". Don't worry about some engraving on yer dipstick "full, with all cylinders extended". The only cylinder ya gotts is about 1-cup of oil in yer hydraulic lift cylinder. 1-cupp outta 5-gals, you do the math. Warning: OVERFILL is just as bad iff'n not worse than gross underfill. Overfill sloshes out yer rearaxle trumpet mouths and greeses yer brakeshoes. Not good.

Iff'n none of these el-cheepie checks don't fixx yer problems, time for a little more serious checkin'. Remove yer 6"round dipstick plate and try and lift yer brushhogg. LOOK FOR SQUIRTS. Use a flashlite. It won't hurt nuttin to operate with yer dipstick plate off. The only moving part is yer PTO shaft underneath all 5-gals of oil. Iff'n you gotts squirts, figger out where its squirtin' from and gitt back with us and we'll help ya more..... ..respectfully, Dell

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Ralph Ledger

11-29-2005 10:42:54




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 Re: Operating the Hydraulics on 8N. in reply to Dell (WA), 11-28-2005 11:31:37  
Dell:
Thank you for your observations. Yes she is full with 5 gallons of new and clean rear end grease. I tried both with the lever under the seat up and the lever down. I will try with the lever simply up and leave it there.

Yes the PTO which has the over running clutch was spinning and I was chopping through the underbrush.

Best Regards,
Ralph



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Hi Dell...John,PA

11-28-2005 13:36:09




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 Re: Operating the Hydraulics on 8N. in reply to Dell (WA), 11-28-2005 11:31:37  
Wouldn't you know it.

Went to the local John Deere outfit and picked up some empty 5 gal. buckets of oil. I was able to take the lids off, drain the remaining contents and use the buckets to empty a 55 gal. barreel full of our topsoil that I raised potatoes in.

Wells, like 'dis: WHOSOEVer packaged the product for JD didn't put the "O" ring under one of the 2 lids. Darn it, I got SHORT CHANGED.

I used to use the "o" rings on the rear-axel trumpets to make the N quite leaking, sometimes.

I guess the packaging COmpany otta make the "quality control" person quit!!

If you want any more info.....e-mail ,me.

Thanks, John, Panthers.

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Bruce (VA)

11-28-2005 11:01:14




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 Re: Operating the Hydraulics on 8N. in reply to Ralph Ledger, 11-28-2005 10:10:08  
I'm not sure I understand the question..... ..with the tractor running in neutral and the PTO engaged & you put the touch control lever in the up position, do the arms raise or not? Have you checked the fluid? If the arms raise & stay up w/ the tractor running but fall when you put the clutch in or turn off the engine, you probably have a lift cylinder/piston problem. If the arms do not raise at all, then you have another set of likely problems. Descibe what exactly is happening please & you will get plenty of help.

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Ralph Ledger

11-29-2005 10:56:32




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 Re: Operating the Hydraulics on 8N. in reply to Bruce (VA), 11-28-2005 11:01:14  
Bruce:
I should have been clearer. The tractor is running, PTO engaged, in first gear chopping brush. I move the hydraulic lever up to raise the arms of the three point hitch to the desired heighth and she slowly lowers back down. I think Dell hit on it. Probably the seat lever was down.
Do I understand correctly that if I have the seat lever up I can lock the hydraulic arms in any position with the operating lever without it creeping on down?

Thanks for your input.

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Dell (WA)

11-29-2005 14:17:02




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 Re: Operating the Hydraulics on 8N. in reply to Ralph Ledger, 11-29-2005 10:56:32  
Ralph..... ....yep, thats semi-correct. With the little flush lever "UP"; yer implement should keep a constant height. (providing it ain't leakin' out the hydraulic piston)

HOWSOMEVERS: many use "stay-chains" as an aid for keeping constant mower height. These chains are between yer top 3-point pin under yer butt-buckett and the implement 2-lower linkpins. This "triangulates" the 3-point linkage (ie...height) but allows you to LIFT the brushhogg over obsticals and returns to the chain controled mowing height. $25 (cheap) Beats rebuildin' yer leaky hydraulic system..... ...Dell, yer self-appointed ORC safety preacher

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Ralph Ledger

12-01-2005 10:37:42




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 Re: Operating the Hydraulics on 8N. in reply to Dell (WA), 11-29-2005 14:17:02  
Dell:
Excellent advice. I know I'm going to try the chain rig next spring. Thank you for your response.

Ralph



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