Kubota B1830, Workshop Manual, Page: 342 / 548

FRONT AXLE B1830,B2230,B2530,B3030, WSM
6-S13
Backlash between Spiral Bevel Pinion Shaft and Spiral Bevel
Gear
1. Place the solder wire (2) on the gear tooth of the spiral bevel
gear (1).
2. Install the spiral bevel gear (1) and the differential yoke shaft (3)
into the front axle case.
3. Install the spiral bevel pinion shaft (4) to the front axle case.
Install the internal cir-clip to the front axle case.
4. Turn the spiral bevel pinion shaft (4) holding the differential yoke
shaft (3) by hand lightly.
5. Take out the solder wire (2). And measure the solder wire (2).
6. If the backlash is not within the factory specifications, change
the adjusting collars (5), (6). For example change the adjusting
collar (6) to 0.1 mm (0.004 in.) smaller size, and change the
adjusting collar (5) to 0.1 mm (0.004 in.) larger size.
7. Adjust the backlash properly by repeating the above
procedures.
(Reference)
• Above factory specification should be measured on the tooth of
spiral bevel pinion. When measuring the backlash on the spline
of its shaft, factory specification will be 0.0571 to 0.1714 mm
(0.00225 to 0.00675 in.).
• Thickness of adjusting collars (5), (6):
3.4 mm (0.134 in.)
3.6 mm (0.142 in.)
3.8 mm (0.150 in.)
4.0 mm (0.157 in.)
4.1 mm (0.161 in.)
4.2 mm (0.165 in.)
4.4 mm (0.173 in.)
4.6 mm (0.181 in.)
9Y1210003FBS0021US0
Backlash between spiral
bevel pinion shaft and
spiral bevel gear
Factory specification
0.10 to 0.30 mm
0.0039 to 0.0118 in.
(1) Spiral Bevel Gear
B1830, B2230, B2530: 23T
B3030: 20T
(2) Solder Wire
(3) Differential Yoke Shaft (RH)
(4) Spiral Bevel Pinion Shaft
B1830, B2230, B2530: 10T
B3030: 11T
(5) Adjusting Collar
(6) Adjusting Collar
KiSC issued 05, 2012 A