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Operation 2 Dismantling the gearbox
(Figure 1 & 2)
1. Drain the gearbox oil.
2. Remove the clutch fork and lever assembly (Section H)
3. Unscrew eight set screws, with lock washers and remove
the top cover, gasket, selector springs and detent balls.
4. Remove seven nuts and lock washers and remove the
gearbox front cover.
5. Using a suitable drift, tap out the mills pins from the
3rd/4th selector fork and lever, then withdraw the selector shaft
through the bell housing. Remove the selector lever.
6. Repeat the above for the 1st/2nd fork and lever and
withdraw the shaft taking note of the interlock pin in the end of the
shaft.
7. Tap out the mills pin from the reverse selector lever and
withdraw the selector shaft through the bell housing.
8. Lift out the selector forks and tilt the gearbox to remove the
two interlock balls from the cross drilling in the bell housing end of the
selector shaft bores.
9. Withdraw the lay shaft into the bell housing, allowing the
lay gear to drop in to the base of the gearbox.
10. Unscrew six set screws complete with lock washers and
withdraw the rear cover and main shaft assembly, taking care not to
displace the front or rear synchro sleeves.
11. tap out the primary gear shaft from the bell housing.
Note: When separating the main shaft from the primary gear shaft the
needle roller pilot bearing may remain on the mainshaft.
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