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Is F-150 Still King?
 
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Old 10-27-2009, 09:47 PM
Zach Sprunger Zach Sprunger is offline
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1985 F-150 clutch won't disengage

I have a 1985 300 6 cylinder F150 and I recently replaced the clutch. After replacing the pressure plate, clutch pad, throwout bearing, and the slave and master cylinders, the clutch still won't disengage. We bled the cylinders, and still nothing happened. The slave cylinder extends against the release fork about one inch.
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Old 10-27-2009, 10:48 PM
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Whoa, slow down... too much, too fast... background information, please... When did
this problem begin? What have you changed prior to it occurring, and what have you
done in an attempt to fix it?
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Old 10-28-2009, 12:52 AM
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i agree with ctu.. need more info..

as well. did you change your pilot bearing while you were in there?? a bad bearing can cause it to act as if the clutch itself isnt disengaging..

just a thought...
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Old 10-28-2009, 07:50 PM
Zach Sprunger Zach Sprunger is offline
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The clutch wen't out a while ago. I replaced it immediately, but I haven't gotten it to disengage at all with the new clutch in. I've replaced the clutch, the pressure plate, and both the hydraulic master and slave cylinders. I haven't replaced the pilot bearing, but I didn't remove the old one either. The car shifted fine before I replaced the clutch.
The car went out on a hill in hi RPM's, could that have damaged something else?
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Old 10-28-2009, 08:11 PM
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My wild guess is the clutch disc is in backwards (Not that I ever did that)
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Old 10-28-2009, 08:46 PM
Zach Sprunger Zach Sprunger is offline
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Ya, that was suggested, but I checked that. I'm thinking it might be a problem with the pilot bearing/bushing, but i didn't remove the old one. The pedal encounters resistance, goes all the way to the floor, and then comes back up on its own. The slave arm extends against the fork a full inch, but the clutch still won't disengage.
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Old 10-28-2009, 08:56 PM
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clutch plate is in backwards. springs go towards the flywheel. it's pushing back on the pedal because you are bending it in a direction it is not saposed to go
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Old 10-28-2009, 10:28 PM
Zach Sprunger Zach Sprunger is offline
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When I installed the clutch plate, there was an inscription on it saying "This side towards flywheel" I installed it that way. Unless it was marked wrong, the clutch plate was installed correctly. I could try taking it out again and installing the other way, but won't it damage the clutch plate if I'm wrong?
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Old 10-28-2009, 10:34 PM
van o van o is offline
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I have had this happen before. When it happened to me when i put the trans back in some of the fingers on the pressure plate got bent causeing it to not disengage.
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Old 10-28-2009, 11:05 PM
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I have a hard time seeing how the pilot bearing could cause this....
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Old 10-28-2009, 11:06 PM
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Quote:
Originally Posted by ctubutis View Post
I have a hard time seeing how the pilot bearing could cause this....
Input shaft not being able to turn freely of the engine
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Old 10-28-2009, 11:08 PM
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Quote:
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Input shaft not being able to turn freely of the engine
How will this cause it to not release?
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Old 10-28-2009, 11:27 PM
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How will this cause it to not release?
Well if it is this situation, most likely the clutch is diengageing but the engine still pulls the truck.
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Old 10-28-2009, 11:30 PM
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I dont see the pilot bushing being the problem though because most likely the tolerance would get larger.
Well hell now I cant see how it could be the problem
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Old 10-28-2009, 11:54 PM
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There's somebody in the clutch/transmission/differential/axle/xfercase forum with this exact
problem on an 84 Bronco:

http://www.ford-trucks.com/forums/89...ml#post8061081
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