Kubota B1830 Workshop Manual page 340

B1830,B2230,B2530,B3030, WSM
Spiral Bevel Pinion Shaft and Differential Gear Assembly
1. Remove the oil seal from the front axle case (5).
2. Remove the internal cir-clip (2) and the collar (3).
3. Tap out the spiral bevel pinion shaft (4) to the rear side.
4. Take out the differential gear assembly (6) from the right side of
the front axle case.
5. Remove the nut (1) from the spiral bevel pinion shaft (4).
6. Remove the taper roller bearings (8).
(When reassembling)
• Replace the oil seal and the nut (1) with new one.
• Apply grease to the oil seal.
• Tighten up the nut (1) until the turning torque of the spiral bevel
pinion shaft reaches the factory specifications. (See page
6-S12.)
• Install the same shims and collars before they are removed.
• Install the taper roller bearing correctly, noting their direction,
and apply gear oil to them.
• Stake the lock nut firmly.
(1) Nut
(2) Internal Cir-clip
(3) Collar
(4) Spiral Bevel Pinion Shaft
(5) Front axle Case
Differential Gear
1. Remove the external cir-clip (2) from the differential case (8).
2. Tap out the spring pins (11) from the differential yoke shafts (1),
(10).
3. Remove the differential yoke shafts (1), (10) from the differential
case (8).
4. Remove the bevel gears (6) and the collars (5) from the
differential case (8).
5. Remove the spiral bevel gear (3) and the ball bearings (4) from
the differential case (8).
NOTE
• Arrange the parts to know their original position.
(When reassembling)
• Apply molybdenum disulfide (Three Bond 1901 or equivalent) to
the inner circumferential surface of the differential bevel gears
(6) and differential pinion (7).
(1) Differential Yoke Shaft (R.H.)
(2) External Cir-clip
(3) Spiral Bevel Gear
(4) Ball Bearing
(5) Collar
(6) Bevel Gear (14T)
6-S11
FRONT AXLE
(6) Differential Gear Assembly
(7) Differential Yoke Shaft (L.H.)
(8) Taper Roller Bearing
(9) Collar
(10) Differential Yoke Shaft (R.H.)
9Y1210003FBS0016US0
(7) Differential Pinion (10T)
(8) Differential Case
(9) Ball Bearing
(10) Differential Yoke Shaft (L.H.)
(11) Spring Pin
9Y1210003FBS0017US0
KiSC issued 05, 2012 A