Dodge D250 1990 Service Manual page 84

Clutch
DODGE Turbo Diesel
Service Procedures
Page 6-3
Service Procedures
9/16 Inch
Improper operation or excessive wear may impair the clutch
function to a point where it may be necessary to remove and
replace the disc and/or cover assembly. Handle the clutch and
the disc carefully to avoid contaminating the friction surfaces.
Replacement
Remove the transmission.
8/16 Inch
Remove the clutch housing, release fork and bearing
assembly.
Mark the clutch cover and flywheel, to maintain their same
relative positions when reinstalling clutch assembly.
Insert a universal alignment tool through the clutch disc hub to
prevent the clutch disc from falling and damaging the facings.