Figure 4D-18. Transmission Access Cover Removed Revised: 9-66

Check shifter forks (10) for bent condition or deep grooves worn into fork fingers caused by excessive thrust action of gears. Also examine both shifter forks (10) and finger rollers (11) for breakage.

Inspect shifter cam follower (12) and spring (13) for wear and damage, especially on thrust face of follower. Check movement of follower and spring in retainer (14). Free length of new spring is approximately 1-19/32 in.

Shifter fork shaft (16) should be removed from access cover for replacement only. Shaft is a press fit in access cover and is gauge-aligned at the factory for correct position in cover. New parts order access covers shipped from factory will also include a shifter fork shaft installed and correctly aligned. Check shaft (16) for bent or damaged condition by slipping shifter forks on shaft and noting if they have free movement on shaft. If it is absolutely necessary to replace 16, press old shaft from cover and align cover on arbor press, inner side of cover up. Press new shaft into cover being extremely careful to keep shaft perpendicular to cover face.

Inspect gear shifter lever arm shaft (17) for wear or bent condition. Temporarily install shaft in crank-case and check for appreciable play in bushings (18). If inspection indicates replacement of bronze bushings (18), it is first necessary to remove gearcase cover as described in "Gearcase," Section 3D. Pry-oil seal (19), from recess in shaft hole with screwdriver and drift bushings from right case and gear-case cover. After pressing in new bushings, install lever arm shaft (17). Shaft must work freely in bushings. Remove any high spots from bushings with a half-inch reamer. To ensure against oil leakage, replace oil seal (19) when reassembling.

MAINSHAFT AND COUNTERSHAFT GROUP (Fig. 4D-20). Inspect gears for badly battered, chipped or rounded dogs and slots at all thrust points. This condition will be evidenced by transmission jumping out of gear. Examine gear teeth for pitting, scoring, cracked, chipped condition or case hardening worn through. Inspect mainshaft, countershaft and all gears for pitting, grooving and excessive wear on bearing surfaces. Slip gears on shafts and check for wear and appreciable play. If not within specification limits as given in "Transmission Specifications," Section 4A, replace worn parts.

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