Figure 11.19. Primary shaft of F4M21 and F5M21 gearboxes: 1 - Snap ring; 2 - Ball bearing; 3 - Inner rotating ring; 4 - Adjusting washer; 5 - 4th gear pinion; 6, 15 - Needle bearings; 7 - Bearing insert; 8, 13 - Synchronizer rings; 9 - Synchronizer springs; 10 - Clutch for engaging 3rd and 4th gears; 11 - Synchronizer cracker; 12 - 3rd and 4th gear synchronizer hub; 14 - 3rd gear pinion; 16 - Primary shaft
Figure 11.20. Primary shaft of F5M22 and W5M31 gearboxes: 1 - Snap ring; 2, 6 - Ball bearings; 3, 13 - Bearing shells; 4 - Snap ring (for F5M22 produced since December 1987); 5 - Snap ring (for F5M31 produced since December 1987); 7 - Adjusting washer; 8 - Spring retaining ring (KM206-0-EKRN, F5M31); 9 - Disc spring (KM206-0-EKRN, F5M31); 10 - Secondary gear (KM206-0-EKRN, F5M31) - 11 - 4th gear gear; 12, 21 - Needle bearings; 14, 19 - Synchronizer rings; 15 - Synchronizer springs; 16 - 3rd and 4th gear engagement clutch; 17 - Synchronizer cracker; 18 - 3rd and 4th gear synchronizer hub; 20 - 3rd gear pinion; 22 - Primary shaft
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