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Farmall & IHC Tractors Discussion Forum
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torque amplifier on 504

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steve

05-22-2004 20:44:27




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looked at a 504 for sale today. had something called a torque amplifier on it, a lever on left side ahead of the clutch. when actuating the lever nothing noticable happens. wondering what this is and how it works. also the exhaust comes out of the manifold and immediately turns downward and comes out under the rear axle. the hood looks origanal and there is no hole for exhaust. it is not a rowcrop machine. also this machine has power steering, ive heard that was optional on this model is this rare? this tractor also has a diesel engine, how common is this? interested in older tractors but dont know a lot about them, kind of learning as i go, any information would be great.

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TDK

05-23-2004 14:26:58




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 Re: torque amplifier on 504 in reply to steve, 05-22-2004 20:44:27  
From what info you've given, it's worth the 1000 dollars. Saw one with complete but rough sheetmetal, stuck diesel engine sell for $600 a few weeks ago. We have one and it's a nice tractor. Mainly used for loader work and to pull round baler. Keep us posted.



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steve

05-24-2004 12:12:07




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 Re: Re: torque amplifier on 504 in reply to TDK, 05-23-2004 14:26:58  
looks like we are going to buy this 504. we are tracking down a problem with the auxiallary hyd. control valve, was dissassembled for unknown reasons. so tdk, where is the plug to check the level of hyd. fluid on your 504? the book that the owner has says that it is on the right rear frame. cant find it anywhere. thanks for all the info.



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TDK

05-22-2004 21:56:35




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 Re: torque amplifier on 504 in reply to steve, 05-22-2004 20:44:27  
If it's not a row crop, then it's an International 504 Utility. The D-188 engine is rated at 46 H.P. & is not rare. 504 was built from '60 - '65 or '66. The power steering is not rare, but hydrostatic steering was first introduced on this series tractors & still in use today. I believe the underslung exhaust was offered, but don't see many diesels with it. The Torque Amplifier is a planetary gear reduction unit. With handle pulled back ground speed is reduced about 30%. With handle in forward position it's direct drive. When T/A handle is pulled back you should feel a difference. You should feel the tractor slow or if T/A is bad or misadjusted you will feel it slip.I think it could be misadjusted to the point that it does nothing, as you say. Try it again if possible on an uphill grade or while putting pressure on brakes. If it slips, just disengage clutch,stop tractor and return T/A handle to forward position. NEVER travel downhill with handle in rear position, tractor will freewheel and must be slowed by brakes or stopped before returning handle to direct drive(forward position).

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TDK

05-22-2004 22:21:18




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 Re: Re: torque amplifier on 504 in reply to TDK, 05-22-2004 21:56:35  
Steve, an earlier post says the 504's were built from '61 - '68.



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steve

05-22-2004 22:58:36




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 Re: Re: Re: torque amplifier on 504 in reply to TDK, 05-22-2004 22:21:18  
thanks for the information TDK, will have to look further into adjustment of the torque amp. havent decided whether to buy yet but am leaning in that direction. owner wants around $1,000.



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Kelly C

05-23-2004 07:21:14




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 Re: Re: Re: Re: torque amplifier on 504 in reply to steve, 05-22-2004 22:58:36  
$1000 and it runs?
If it does you better grab it fast. Thats a steal as far as I know.



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