Posted by RodInNS on February 02, 2013 at 07:51:00 from (216.118.158.123):
In Reply to: Ford 4000 alternator posted by S.B.Hahn on February 01, 2013 at 22:21:50:
If it's a 68 it's a 3 cylinder engine or it's not a 4000...
As far as the alt goes... if you're going to run a tach off the alt you need to have the correct size pulley which is 1/2 the size of the crank pulley. That said... if you want to drive a tach off the alt you need either a Delco 10DN with a drive or a Delco 10si it from Tisco that has been adapted with a drive. A standard Delco WILL NOT have a drive as the rotor shaft is not bored to provide a drive. Also beware that not all 10DN were set up to adapt a drive. Some were for AG applications but a standard truck application will not be... You also need an external reg for the 10DN wheras the 10si is internally regulated.
Another option... IF the tractor has a post '72 engine block the oil pump drive arpeture is adapted to accept a tach drive... so you'd just install a new oil pump shaft with the appropriate bore for the drive, add the drive in place of the welch plug in the hole... then install an x600 series instrument cluster from the years 76 to 79 and everything should work.
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