Tanaka TBC-420PF Service Manual page 20

7- 4 Assembling gear case
1) Install ball bearing into the bottom of gear case using the proper
daimeter installer. See below for diameters.
Dia. 20mm ----- TBC-230 series
Dia. 24mm ----- TBC-2501/250PF/260PF/270 series, TBC420PF
TBC-4200D/DLV/430PFLV/550/600
2) Apply grease on gear shaft and insert it into ball bearing which was
installed in section 1) using one of gear shaft inserter's shown on
the Special tool list. Fig.37
3) Insert ball bearing into pinion using one of the pinion inserters which are
shown on the Special Tool List. Fig.38
4) Install the pinion installed bearings by gradually turning the gear shaft so that
the pinion engages properly with gear, and then press in using pinion inserter and
install the stop ring in place using long nose snap ring pliers.
NOTE: When installing the stop ring, always use a new stop ring.
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