Replacing Shifter Cover

Coat shifter cover gasket with Perfect Seal No. 4 and position on gear box. Install assembled shifter cover over gear box opening and secure with twelve screws. Note that two screws are longer. They are inserted in holes adjacent to bulge in cover over shifter gear. The short cover screw with vent hole is inserted in hole nearest locating dowel pin on right side of gear case. Use Loctite sealant on all screw threads except the single vent screw.


Remove shifter cover as described in "Removing Shifter Cover."

Shifter fork shaft (2) is held in position by lock screw (1) which may be found in gear box cover joint surface in line with right end of shaft. With lock screw (1) removed, shaft may be driven out by means of a drift inserted in hole in starter cover joint face of gear box. Notice that a rubber oil seal (3) is assembled in groove on left end of shifter fork shaft.

Shifter fork assemblies (A and B) are not interchangeable. Note exactly the arrangement of parts and components in each. Keep parts separate to avoid needless adjusting when reassembling. If inspection shows fork assemblies are not damaged, worn or bent, it may not be necessary to disassemble them unless shifter clutches are replaced. Adjustments are described in "Assembling Shifter Forks."


If it is necessary to disassemble shifter forks, lift off shifter finger rollers (4), pry back ear on lock washer (6) and turn off nut (5). Lift washer (6), a number of .014 in. or .007 in. spacing shim washers (7) which varies from one fork assembly to another, shift forks (8), 5/64 in. thick standard spacing shim (9), more .007 in. or .014 in. spacing shims (10), shifting fingers (11) and shifting fork bushings (12).


Clean all parts in cleaning solvent and blow dry with compressed air.

If shifter forks are bent or worn, replace them. Straightened forks are weak. They may break and cause extensive damage to gear box parts.

Check fit of shifter fork bushings on shaft. If bushings are loose enough to give fork action lash, replace them. Check replacement part fit on shaft.

Lap out bushings if they bind. Shifting will be difficult unless bushings work freely on shaft.

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