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Clutch questions (440 with A833 in Challenger)
#608774
02/09/10 11:58 AM
02/09/10 11:58 AM
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Joined: Sep 2009
Posts: 263
Switzerland, Europe
Swiss_Robert
OP
enthusiast
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OP
enthusiast
Joined: Sep 2009
Posts: 263
Switzerland, Europe
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After having my A833 reassembled, I took a look to the clutch that is in that (cloned) car (where I already found some drivetrain-components that are not correct for that configuration).
The clutch has "Borg & Beck" writing on it. Friction disk has 11" diameter (quickly measured). It has 23 spline inner ring (that fits onto the A833 input shaft). And I'm not sure about how good or bad it looks for a used friction disk.
It has a small piece braked out from lining (see pic). And seen from the side I see that the lining has at some places lost contact to the metal disk in between. I think someone did some damage with a srewdriver pushing between - whyever.
Is this a known product? Is 11" disk with 23 spline a standard? Can I reuse the friction disk?
After all these years having a 440 I realized that this means having an attitude... and a budget.
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Flywheel: Clutch questions
[Re: Swiss_Robert]
#608775
02/09/10 12:07 PM
02/09/10 12:07 PM
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Joined: Sep 2009
Posts: 263
Switzerland, Europe
Swiss_Robert
OP
enthusiast
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OP
enthusiast
Joined: Sep 2009
Posts: 263
Switzerland, Europe
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Exploring the flywheel (Moroso?) having 130 teeth I found the steel surface (that contacts the friction disk) having a strange pattern. See pic.
With enough light it looks like cracks - but more than cracks these are edges from "smearing" the metal when friction disk rubs over it.
The clutch was not a problem before disassembling (I wanted to repair the transmission - I just took a look).
Is this normal for a used flywheel? Can i reuse it?
After all these years having a 440 I realized that this means having an attitude... and a budget.
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Pilot Bearing: Clutch questions
[Re: Swiss_Robert]
#608778
02/09/10 12:16 PM
02/09/10 12:16 PM
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Joined: Sep 2009
Posts: 263
Switzerland, Europe
Swiss_Robert
OP
enthusiast
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OP
enthusiast
Joined: Sep 2009
Posts: 263
Switzerland, Europe
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Last question:
Checking the pilot bearing inside the flywheel I found it simply filled with dust.
After cleaning a bit it looks - normal (see pic). It has obviously not had to much contact to the input shaft (of A833) and the input shaft (the tip that runs inside that bearing) does not look worn or so.
It that much play normal between input shaft and pilot bearing?
I assume that one should not put grease into that bearing when reassembling, correct?
After all these years having a 440 I realized that this means having an attitude... and a budget.
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Re: Pilot Bearing: Clutch questions
[Re: Swiss_Robert]
#608780
02/09/10 04:16 PM
02/09/10 04:16 PM
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Joined: Oct 2003
Posts: 2,309
South, FL
cudaized
top fuel
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top fuel
Joined: Oct 2003
Posts: 2,309
South, FL
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Quote:
After cleaning a bit it looks - normal (see pic). It has obviously not had to much contact to the input shaft (of A833) and the input shaft (the tip that runs inside that bearing) does not look worn or so.
It that much play normal between input shaft and pilot bearing?
I assume that one should not put grease into that bearing when reassembling, correct?
Looks normal. It only needs a light coating of (White Lithium) grease when you install the transmission. Both on the bushing and the tip of he transmission input shaft. Do not over fill.
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Re: Flywheel: Clutch questions
[Re: Swiss_Robert]
#608781
02/09/10 04:34 PM
02/09/10 04:34 PM
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Joined: Oct 2003
Posts: 2,309
South, FL
cudaized
top fuel
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top fuel
Joined: Oct 2003
Posts: 2,309
South, FL
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Quote:
Exploring the flywheel (Moroso?) having 130 teeth I found the steel surface (that contacts the friction disk) having a strange pattern. See pic.
With enough light it looks like cracks - but more than cracks these are edges from "smearing" the metal when friction disk rubs over it.
The clutch was not a problem before disassembling (I wanted to repair the transmission - I just took a look).
Is this normal for a used flywheel? Can i reuse it?
Those ARE cracks. Heat cracks. Stress cracks. Yes, you could reuse it as is, BUT you should not. It is normal wear and tear. Probably from some "spirited" driving and/or riding the clutch
I would not reuse it as it is. I would bet that anyone reading this would agree with me - re-surface the flywheel now. You are already this far into the project, what is another few days and a few more Euros?
The machine shop needs to cut (NOT grind) the surface of the flywheel to try and remove the cracks and the wear pattern area from the clutch disc (the smearing). It looks like they will at least remove 1/8th inch (3-4 mm). The cracks might be so deep that you will still see some of them after the resurfacing. This is a normal consideration when anyone replaces a clutch and pressure plate.
Speaking of presure plate, I bet the surface looks worn like the flywheel. You may consider replacing the clutch and pressure plate now. Or at least check to see if the pressure plate surface is not warped or worn (smearing). Use a staight edge and see if the pressure plate surface is flat. Some people have reused an old one by lightly sanding the contact surface.
At least replace the cluch disc (friction material).
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Re: Flywheel: Clutch questions
[Re: cudaized]
#608782
02/09/10 06:36 PM
02/09/10 06:36 PM
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Joined: Sep 2009
Posts: 263
Switzerland, Europe
Swiss_Robert
OP
enthusiast
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OP
enthusiast
Joined: Sep 2009
Posts: 263
Switzerland, Europe
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Thanks for your help. Yes, I think I will replace that stuff. So quickly goes the hope... that at least the clutch would be okay. 
After all these years having a 440 I realized that this means having an attitude... and a budget.
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