Troy-Bilt Bronco CRT Operator's Manual page 18

4. Remove all dirt and clean the area around the transmission
cover. See Fig. 7-3.
5_
6_
7_
8.
Figure 7-3
Remove the four hex screws (sA6-18 x .75) securing the
transmission cover to the drive shaft and remove the cover.
See Fig. 7-3
Remove the left-side wheel. Tilt the left-side wheel shaft
into a drain pan and allow the gear oil to drain through the
top of the transmission.
Reinstall the wheel and reinstall the transmission cover.
Refill the transmission using Mobil 1®Synthetic 75W 140.
Refill the engine with motor oil and replenish the fuel tank
with gasoline.
9. Reinstall the belt cover.
SECTION 7--
SERVICE