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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Clutch or System Situation???

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Old Jul 9, 2016 | 12:15 PM
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Clutch or System Situation???

Hi All
With my 351 Np435 and Hydraulic Clutch, recently I have noticed that If

I have the clutch completely to the floor then let up only about 1/2 inch the truck will start moving,

I've never really took note of this, but is this "normal"
Or are things about to die?

BTW, ZF-5sp sitting on the garage floor waiting for a chance to get installed....
Thanks
 
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Old Jul 9, 2016 | 01:26 PM
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Not normal.

How many miles are on your clutch?

ETA:. You should check the plastic bushing where the pedal.lever connects to the master cylinder.

Also, have someone push the pedal while you measure how far the slave moves the throwout arm.
It should be 5/8" or more iirc.
 
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Old Jul 9, 2016 | 04:09 PM
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Check your fluid level in the clutch master cylinder. Make sure the rubber cap that fits in the lid is in the lid and not stuck on top of the master reservoir. It has fooled me several times and I think I have plenty of fluid when I do not.
 
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Old Jul 9, 2016 | 07:38 PM
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Also check the firewall where the clutch master cylinder fits, it may be ripped. That is a common issue now in these older trucks. Firewall flexes then tears.
 
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Old Jul 10, 2016 | 09:21 AM
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Thanks Guys !
Will ding into this AFTER repairing the primary driver, 2007 F-150... Can Women hear sometimes?
The wife spent a week in VT on a vacation with the kids, (about 300 miles one way) I did a trip check before the trip, and all was well, mid week the rear brakes were making "noise" according to the kids, Well she was rivet-to-rotor for traveling the 2-largest mountains and the trip home...... No truck fire cause it rained for the trip home, kept things "cool"
 
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Old Jul 11, 2016 | 06:05 PM
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Well I got some measurements today, Pushing the clutch to the floor makes the slave cylinder move 1/2' (not the 5/8" I was hoping for) The fluid is within 1/4" of the top, and there does not seem to be any slop in the linkage under the dash.

Also the wall around the master does not seem to move, but the master it self "wiggles" a little upon pressing the pedal.

I believe the wall is OK, because it spent all it's life as an Auto, only this year it is a Standard...
 
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Old Jul 12, 2016 | 01:22 PM
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Originally Posted by reamer
Well I got some measurements today, Pushing the clutch to the floor makes the slave cylinder move 1/2' (not the 5/8" I was hoping for) The fluid is within 1/4" of the top, and there does not seem to be any slop in the linkage under the dash.

Also the wall around the master does not seem to move, but the master it self "wiggles" a little upon pressing the pedal.

I believe the wall is OK, because it spent all it's life as an Auto, only this year it is a Standard...
Did you find the rubber part of the cap? Is it in the cap?
 
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Old Jul 12, 2016 | 01:45 PM
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Yep The rubber is in the cap....
 
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