13
Gearbox
Note: When installing the bearings, make sure they are fully seated. If the bearings are not fully seated
the gearbox halves may not properly fit together or may cause binding.
1. Install a 5mm washer (X) onto each end of the top shaft (83)
2. Install a 5x10mm bearing (108) into the upper hole of the left gearbox half (21).
3. Install the top shaft (83) into the 5x10mm bearing that was just installed into the left gearbox half.
4. Install the 2x10mm spring pin (116) into the top shaft
5. Attach the roll pin cover (7) to the left gearbox half.
6. Install a 5x10mm bearing (108) into each side of the idler gear (17).
7. Install the idler gear shaft (89) into the idler gear bearings.
8. Install the idler gear into the left gearbox half (21).
9. Install a 12x18mm bearing (110) into the lower hole in the left gear box half (21).
10. Install the ball differential into the 12x18mm bearing that was just installed into the left gear box half (21).
11. Insert a 12x18mm (110) and 5x10mm bearing (108) into the right gearbox half.
12. Install the two gearbox halves together. Make sure the two gearbox halves seat together properly.
13. Secure the two halves together with the 4-40x1/2" socket head screw (D).
14. Install the aluminum motor plate (96) on the side of the gearbox and attach it with the (3) 3x25mm socket
head screws (G).
96
21
108
X
116
83
X
20
P
G
P
D
110
17
108
108
89
110
