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grinder220 
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Joined: 11 Jan 2012
Location: Clinton Iowa
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 Topic: torque limiter question
Posted: 07 Dec 2016 at 9:59am |
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I need to put a new TL in my 7050 this winter and that got me thinking about this. Why do the powershift trannys use a pressure plate and the power directors use the Belleville spring? Is there a benefit to one over the other? Could the PP be used on the 7050?
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DrAllis
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Joined: 12 Sep 2009
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Posted: 07 Dec 2016 at 12:18pm |
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In the original design of the Power-Shift transmission, Engineers were concerned about possible Winter starting problems, and wanted a way to release the entire driveline to ease cranking speed concerns. Turns out, there never really was an issue, so there were never any fingers added to the pressure plate. As time went on, the last of the 7040-7060 Power-Shift tractors used the same flywheel and torque limiter as the Power Directors tractors. The pressure plate design won't fit in a Power Director bell housing.
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grinder220
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Location: Clinton Iowa
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Posted: 07 Dec 2016 at 1:50pm |
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Thanks for the info
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tbran
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Joined: 14 Sep 2009
Location: Paris Tn
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Posted: 07 Dec 2016 at 2:33pm |
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early 7020's PS units had the light fly wheel - we changed out several to the heavy flywheel with clutch type pressure plate
to increase flywheel inertia for the PS and non stall when reversed... just FYI 7020's could have both on a PS...
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When told "it's not the money,it's the principle", remember, it's always the money..
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DrAllis
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Posted: 07 Dec 2016 at 3:19pm |
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I installed a combine flywheel (N-6 or L-2...can't remember) on an 8050 PShift once to give it some more hay baler flywheel torque.
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MACK
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Posted: 07 Dec 2016 at 9:18pm |
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There is not enough room in PD tractors for pressure plate
type clutch torque limiter. MACK
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WD45Diesel57
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Joined: 20 Jul 2010
Location: Varna, Ont. Can
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Posted: 08 Dec 2016 at 7:29am |
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i have quite a time with my 7020 stalling in high reverse, where would I find a heavy flywheel in what model tractors? we have a local wrecker that may have one!
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1-B's, 2-C, 2-CA's,2-WF, 1-WC,1-G, 3-WD's, 2-WD45, 1-RC, 1-D17 Diesel, 1-D14, 2-D15,1-D17 row crop,1-D19 gas and All Crop 40,60,66,72,90 and 100
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Peterson
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Posted: 08 Dec 2016 at 8:13am |
 DrAllis wrote:
I installed a combine flywheel (N-6 or L-2...can't remember) on an 8050 PShift once to give it some more hay baler flywheel torque. |
Just put the PS hub into the combine disc and it lined up? Think that would he the ticket for our chopper tractor.
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7095-685I at 255hp, 8070-225HP,8050-210Hp,8030 with 155HP,220 with 670T engine with A-pump, 7580, 185 with 140HP, 2-6080's,6070, S4 D17,wd45,CA,st34 agco, S1 D17 with 3500MK2
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DrAllis
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Posted: 08 Dec 2016 at 9:10am |
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Nope. Still able to use the spring pressure plate and T L disc. Seems to me like that flywheel weighed just over 100 lbs.
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DougG
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Location: Mo
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Posted: 08 Dec 2016 at 12:23pm |
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Don't the big boys in tractor pulling add weight to the flywheels to make them lug better ?
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MACK
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Posted: 08 Dec 2016 at 9:12pm |
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No, we put weights on fingers for centrifugal force
to engage clutch. The more weights on fingers, the more pressure on clutch discs. MACK
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