Author Topic: How to get to clutch fork adjustment  (Read 7040 times)

Offline cwest

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How to get to clutch fork adjustment
« on: August 30, 2016, 09:48:47 am »
Hello all,
86' K20 SM465.  I replaced clutch, pressure plate, etc.  I've got a little chirp when my foot is completely off the clutch pedal.  If I put even a toe on the pedal the chirp stops.  This makes me think the system needs a half mm adjustment.  There's no adjustment built into the pedal assembly or with the slave cylinder(that I can see).  The only thing I can see that might be adjusted is the pivot point for the clutch fork.  It appears to have a place for an allen wrench, but is all but inaccessible.  Any tricks on how to get this thing adjusted back a skosh?   
86' Chevy K20
350/SM465/np208

08' Silverado 1500 4X4 WT

Offline 1967KaiserM715

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  • 1985 GMC K1500 w/ 6.5 TD
Re: How to get to clutch fork adjustment
« Reply #1 on: August 30, 2016, 06:54:01 pm »
The ball stud isn't an adjustment point. With the hydraulic clutch there should be no perceptible play. Now I do think there is a little adjustment at the pedal but that's it. Should be you get the system bled and that's it. How old is the whole clutch system(clutch pressure plate, fork etc)


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Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline 1967KaiserM715

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  • 1985 GMC K1500 w/ 6.5 TD
Re: How to get to clutch fork adjustment
« Reply #2 on: August 30, 2016, 06:58:44 pm »
Sorry Tapatalk won't let me edit?? But just reread and saw you replaced everything, did you add a little grease to the splines and throwout bearing surface? And the pilot bearing?


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Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline cwest

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Re: How to get to clutch fork adjustment
« Reply #3 on: August 31, 2016, 04:41:09 pm »
I tried to get some WD40 in there with the little red extension, but I couldn't get it to find the sweet spot. The hole where the clutch fork goes in is little and at a bad angle to visualize where the throw-out bearing and the pressure plate splines meet.  There is a grease fitting close to the clutch fork access, but I can't imagine grease reaching all the way to the where I need it.  I can give it a try though. 
86' Chevy K20
350/SM465/np208

08' Silverado 1500 4X4 WT

Offline 1967KaiserM715

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  • 1985 GMC K1500 w/ 6.5 TD
Re: How to get to clutch fork adjustment
« Reply #4 on: August 31, 2016, 04:54:29 pm »
When you throw everything together your supposed to dab a little grease on all contact points- not too much though as you don't want it to get on the clutch plate itself, and that grease fitting is just for the ball stud, it takes a lot of wear, so about every other oil change you should do a half to a full pump to get fresh grease up there.


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Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline cwest

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Re: How to get to clutch fork adjustment
« Reply #5 on: September 06, 2016, 06:30:06 pm »
I need to get one of those dentist mirrors on a stick so I can see in the clutch fork opening and spritz a little lube in there.  Without getting any on the clutch plate of course.  Thanks for the correspondence, I'll try to let you know what I come up with   
86' Chevy K20
350/SM465/np208

08' Silverado 1500 4X4 WT

Offline cwest

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Re: How to get to clutch fork adjustment
« Reply #6 on: September 09, 2016, 01:17:01 pm »
Just as an update..  On another random forum I found some other guys having my same problem.  They suggested white lithium grease using the red extension to get in there.  To my amazement I found the sweet spot and was able to get the chirp to stop.  I drove for maybe fifty miles over two days and started noticing it come back just barely audible, so I imagine I'll have to do it every so often(hopefully not every 50-75 miles, but at least I know it's an easy fix.  Thanks again for the dialog!
86' Chevy K20
350/SM465/np208

08' Silverado 1500 4X4 WT