Inspection And Replacement Of Parts

Thoroughly clean transmission compartment and all shifter, mainshaft and countershaft parts with cleaning solvent or gasoline. Blow parts dry with compressed air and inspect to determine if any must be replaced. Replace all parts that are badly worn or damaged.

TRANSMISSION SPROCKET (Fig. 4D-15). Inspect mainshaft sprocket (3) for badly worn or damaged sprocket teeth and splines. Discard gasket (6). Check oil seal and retainer (5), lock washer (2) and mainshaft nut (1).

SHIFTER MECHANISM (Fig. 4D-19). Discard gear shifter cam retaining ring (3). Carefully examine gear shifter cam (5) for grooved or worn cam slots at the various running gear positions. Excessive wear at thrust points will make the transmission difficult to shift through gear range.

Inspect gear shifter pawl carrier (6) for depressions or grooves worn in fingers that engage shifter lever arm shaft (17). A badly worn yoke is caused by rubbing action of lever arm shaft ball, and will result in transmission jumping out of gear. Examine pawl carrier support for breakage or minute surface cracks, Loosely assemble shifter cam (5), pawl carrier (6), support (7), shims (7A) (if used), and check bearing action for appreciable play. Parts that show extremely worn or pitted surfaces should be replaced.

Examine pawl carrier springs (8) for breakage or damage caused by acids in oil. If possible, compare old springs with new springs. New spring free length is approximately 2-25/32 in.

0 0

Post a comment