Clutch Modifications for late TD & TF
Don Harmer
To overcome the binding and extreme wear of the clevis pin pivots in the clutch linkage due to the axis of rotation
changing as the clutch is depressed, the clevis type pivots for some ends were replaced by control rod ends (spherical
bearings). this was done to solve the five bar linkage problem where all bars are not in the same plane.
Replaced
Pedal Shaft
( 2 2 )
Clutch Rod
( 3 7 )
Clevis Pins
( 5 0 )
Washers
( 2 7 )
Oil Pan Lever (Clutch)
( 3 8 )
Barrel Pin
( 4 3 )
Pedal Bushing
( 2 6 )
Clutch Link
( 4 8 )
Bolts Replacing Pins
( 5 0 a )
The lever on the oil pan (38) was remade with a metric bearing to fit the oil pan pin (40) and to provide attachments for two
rod ends.
Use 1/4 inch ID or 6 mm ID rod bearings with 1/4 x 28 or 6 x 1 mm threaded attachment threads, either male of female as
appropriate, adjustment is provided either by a turn buckle equivalent (or by right and left hand threads on the rod ends).
The upper rod adjustment is by rod end threads and is only needed at installation so no turnbuckle action is needed. The
lower rod turn buckle provides the same clutch adjustment as the current nut (45). The turnbuckle can be omitted and
the adjustment made by removing the bolt to the oil pan lever and simply screwing the control rod end in or out as
needed. Testing is done by reinserting the bolt and pressing the pedal for the clearance as before.
The lower rod to the clutch pedal , Clutch Rod (37) is where it is essential to have rod end bearings that can swivel as the
mechanism goes thru its travel as the clutch is depressed and the angle of the rod changes relative to the pivots on the
ends.