R380 Manual Gearbox Overhaul
MANUAL GEARBOX
34
OVERHAUL
Selectors - Reassemble
1. Rest 1st/2nd fork and shaft assembly on bench
and locate pin in jaw of fork.
2. Fit interlock spool and 3rd/4th fork and engage
spool in jaw of fork.
3. Slide spool and fork towards 1st/2nd selector
until slot in spool locates over pin keeping the
spool engaged in 3rd/4th fork jaw.
GEARBOX REASSEMBLE
Output shaft and layshaft end float
NOTE: The end float setting for both the
output shaft and the layshaft has to be
determined before the gearbox can be
reassembled. This is achieved by clamping the
output shaft and layshaft separately between the
centre plate and main casing and measuring the
movement of each shaft with a dial test indicator.
Shimming
1. Fit new bearing tracks to front cover.
CAUTION: Ensure input shaft bearing
track is correct for type of front cover
fitted. Early covers having a lug each side
of cover, bearing track is retained with a spring
clip. Later covers having a lug on one side of
cover, press bearing track into cover using a
suitable mandrel.
2. Fit front cover to gearcase without oil seal.
3. Clamp gearcase in vice with front cover
downwards.
4. Fit input shaft.
CAUTION: Do not fit 4th gear baulk ring.
5. Fit output shaft assembly to input shaft.
6. Fit output shaft bearing shim and track to
centre plate.
