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09-04-2010, 10:31 AM
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#1 |
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Registered User
Join Date: Jan 2002
Location: Texarkana, Texas
Posts: 261
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hydraulic clutch?
The clutch pedal does not always come back up.Truck sat for 18 years. I just put on a new slave and replaced all the brake parts. Works good most of the time. Is there something I missed?
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1961 Apache short step. |
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09-04-2010, 11:01 AM
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#2 |
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Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: hydraulic clutch?
does it still need more bleeding. perhaps the m/c requires a kit, they sometimes leak out the back end. can you smell brake fluid in the cab?
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09-04-2010, 11:02 AM
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#3 |
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Just here to tinker
 
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: hydraulic clutch?
It also sounds to me like the m/c is bleeding down.
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
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09-04-2010, 11:04 AM
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#4 |
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Registered User
Join Date: Jan 2002
Location: Texarkana, Texas
Posts: 261
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Re: hydraulic clutch?
I just replaced it all. New master and slave and wheel cylinders.
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1961 Apache short step. |
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09-04-2010, 12:23 PM
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#5 |
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Senior Enthusiast
Join Date: Feb 2007
Location: Spokane Valley, WA
Posts: 8,356
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Re: hydraulic clutch?
The root cause may well be dry nylon bushings (#4 in the drawing) on the pivot shaft. Pulling the pedal and lubricating the sleeves should resolve the problem. You might also want to connect a medium tension return spring as indicated number 11 in the attached line drawing from the 1960 shop manual:
Mine was originally a GMC V6 and came stock with this spring, there was no over center spring as shown in the detail drawing in the upper right corner. Without the return spring mine will not consistently return to full pedal height. 
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09-04-2010, 01:18 PM
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#6 |
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Registered User
Join Date: Jan 2002
Location: Texarkana, Texas
Posts: 261
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Re: hydraulic clutch?
thanks for the drawings. The med. spring was there but in the wrong place. It may solve it.
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