I just posted this in the MODs forum, but someone in our chapter may have some ideas. I just confirmed today that my only problem with operating the clutch pedal on my diesel rig is the heavy duty clutch pressure plate I installed about 10+ years ago...
The SC on the transmission is a near exact match area wise to the Jeep, and the jeep MC is a near exact match for the Nissan truck the diesel came from. So the hydraulic pressure at the pressure plate is very close to OEM.
I have a custom 1985 diesel jeep (was a gas 4 banger in another life), that has a Nissan SD-22 diesel engine and 5 speed manual transmission with an MC/SC hydraulic clutch.
Over a decade ago I installed a heavy duty clutch-pressure plate system after rebuilding the transmission. Now I am partly disabled with rheumatoid arthritis and my legs and knees are no longer strong enough to push the clutch pedal more than 2-3 times...But I can operate regular brakes, and new car clutches (tested a ford fiesta last week, and it was easy to operate). I confirmed today that the problem is the HD pressure plate spring and not anything else in the system.
One obvious choice is to try an OEM pressure plate/clutch package.
The other is to make or find a custom vacuum booster operated hydraulic clutch MC assy, or anything that is available in the custom world to make the clutch pedal easy to push. Until I install a weaker factor pressure plate, I will not know if that will be enough so I am working on a custom mod idea now.
I need ideas, links folks!!!! I can not be the first person to have this issue.
I do not want to give up my 34 mpg diesel Cherokee!!! BTW it can be push started, so it is EMP proof too, LOL. Its a keeper
Thanks!!!!