PCausey
Registered User
OK Ford friends I have a tech question for you. I installed my new brake pedal support with attached clutch pedal in my '85 E-350. I think the salvage yard I bought it from might have shipped me an assembly from a '84 or older though but with nothing to compare it to I can't tell for sure. Modifying the lever arm under the dash is no big deal but I need to make sure I get the correct stroke for the hydraulic master cylinder. Measured on the bench the potential full range stroke for the master cylinder is 1.75". My lever arm only provides approx 1" of stroke at it's current length. I can do the math and calculate how far that will move the piston in the slave cylinder based on bore diameter and fluid volume. What I'm not sure about is just how much travel I need from teh slave cylinder to engage the clutch on a ZF S5-42 5spd trans behind a diesel engine? Does anyone know? Has anyone ever measured the stroke of the slave cylinder piston on a ZF? I'm sure I'll figure it all out but if anyone can cut some research time off this problem I'd sure appreciate it. It'd be one thing if I was dealing in a single vehicle application but this is all custom and is taking some trail and error. And the less error the better.
Here's a breakdown of the parts I'm using together:
'91 F-350 ZF S5-42 5spd manual trans with hydraulic slave cylinder to match
'85 E-350 clutch master cylinder for a 4.9 inline six application (same exact part number as master cylinder for the '91 F-350 application the trans came out of)
Clutch pedal and underdash lever that was supposed to come from a '85 E-350 with hydraulic clutch however when I got it the orientation of the lever was such that I think it worked vertically instead of hoizontal and I'm thinking the '84 and older vans had horizontal mechanical linkage completely different from the '85 and newer horizontal hydraulic system.
Another way to solve this for sure would be to know what the length of the lever arm that moves the plunger of the master cylinder is on any diesel with a hydraulic clutch if anyone could be so kind as to get me a good measurement please?
Thanks
Here's a breakdown of the parts I'm using together:
'91 F-350 ZF S5-42 5spd manual trans with hydraulic slave cylinder to match
'85 E-350 clutch master cylinder for a 4.9 inline six application (same exact part number as master cylinder for the '91 F-350 application the trans came out of)
Clutch pedal and underdash lever that was supposed to come from a '85 E-350 with hydraulic clutch however when I got it the orientation of the lever was such that I think it worked vertically instead of hoizontal and I'm thinking the '84 and older vans had horizontal mechanical linkage completely different from the '85 and newer horizontal hydraulic system.
Another way to solve this for sure would be to know what the length of the lever arm that moves the plunger of the master cylinder is on any diesel with a hydraulic clutch if anyone could be so kind as to get me a good measurement please?
Thanks