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25 ccu clutch plates replacement

25 ccu clutch plates replacement

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willitrun
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would anybody know what the max and min height of the clutch stack should be on a # 25 CCU in the perfect world or are there any measurements ? i'm going to be using used clutch plates and tried adding a couple, looks like to much. thanks
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Sat, Nov 21, 2015 5:29 AM
Old Magnet
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I don't recall seeing any measurement specs but when new they used seven bimetallic discs @ 4.7mm thick and six steel discs @ 2.3mm thick.
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Sat, Nov 21, 2015 6:12 AM
seiscat
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Reply to Old Magnet:
I don't recall seeing any measurement specs but when new they used seven bimetallic discs @ 4.7mm thick and six steel discs @ 2.3mm thick.
In the 1970's I rebuilt a 25CCU using discs and plates from the steering clutches of a D7 3T. Those D7 discs and plates had been replaced but were deemed too good to be scrapped. I added 1 disc and 1 plate and got away with it. I know if you do not exceed 2¾" stack height you are good and I think you are good to 3" as there is enough "allowance" in the adjustment of the unit.
I am still amazed by the things that I got away with when I didn't know what I was doing! :doh:
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Sat, Nov 21, 2015 7:11 AM
Old Magnet
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Reply to seiscat:
In the 1970's I rebuilt a 25CCU using discs and plates from the steering clutches of a D7 3T. Those D7 discs and plates had been replaced but were deemed too good to be scrapped. I added 1 disc and 1 plate and got away with it. I know if you do not exceed 2¾" stack height you are good and I think you are good to 3" as there is enough "allowance" in the adjustment of the unit.
I am still amazed by the things that I got away with when I didn't know what I was doing! :doh:
They do use D7 steering clutch discs but the math does not check out. I get a total new stack height of 46.7mm or 1.84"
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Sat, Nov 21, 2015 7:26 AM
Rome K/G
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Reply to seiscat:
In the 1970's I rebuilt a 25CCU using discs and plates from the steering clutches of a D7 3T. Those D7 discs and plates had been replaced but were deemed too good to be scrapped. I added 1 disc and 1 plate and got away with it. I know if you do not exceed 2¾" stack height you are good and I think you are good to 3" as there is enough "allowance" in the adjustment of the unit.
I am still amazed by the things that I got away with when I didn't know what I was doing! :doh:
Usually just the four or so inner discs get wore the most.
Gary
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Sat, Nov 21, 2015 7:28 AM
willitrun
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Reply to Old Magnet:
They do use D7 steering clutch discs but the math does not check out. I get a total new stack height of 46.7mm or 1.84"
well i'll do some measuring tomorrow. they were steel to steel, still worked but not very good.
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Sat, Nov 21, 2015 7:34 AM
ianoz
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Reply to willitrun:
well i'll do some measuring tomorrow. they were steel to steel, still worked but not very good.
Steeringclutch.com usually have them in stock .Not expensive
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Sat, Nov 21, 2015 10:26 AM
seiscat
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Reply to ianoz:
Steeringclutch.com usually have them in stock .Not expensive
Thanks for catching my math error Old Magnet. My fuzzy memory of that old rebuild combined with a somehow fat fingered calculator total of plates plus total of discs plus a conversion of MM to inches led me to a big error.
I am sorry for any confusion I caused, I should have checked my figures. 😛out:
Oh yeah, it's measure twice, cut once! Darn it!
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Sat, Nov 21, 2015 9:31 PM
Showing 1 to 7 of 7 results
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