Kubota WSM B2050 Workshop Manual page 126

B2050, B2350, B2650, B3150, WSM
Cam Gear, Idle Gear 1, 2 and Governor Gear
1. Remove the external snap ring (9), and then remove the idle
gear 1 (10).
2. Remove the lock nut (1), and then remove the bearing nut (2)
with a bearing nut finger socket (11).
3. Remove the idle gear 2 (5) with taper roller bearing.
4. Remove the fuel camshaft stopper (15).
5. Draw out the fuel cam gear (12) with fuel camshaft (16).
6. Remove the camshaft stopper bolt.
7. Remove the cam gear (7) with camshaft.
8. Remove the external snap ring (18) from the governor shaft
(20).
9. Remove the governor gear (13) with governor shaft (20).
NOTE
• Three-lever type fork lever
To remove the governor shaft, follow the procedures in 8, 9
above and never remove fork lever and the max torque
limiter.
(When reassembling)
• Apply engine oil thinly to the fuel camshaft before installation.
• Make sure to assemble the external snap ring of the governor
shaft.
• Check the governor shaft for smooth rotation.
• Tighten the idle gear 2 bearing nut and the idle gear lock nut to
the specified tightening torque.
IMPORTANT
• When replacing the ball bearing of governor shaft, securely
fit the ball bearing (18) to the crankcase, apply an adhesive
(Three Bond 1324B or equivalent) to the set screw (20), and
fasten the screw until its tapered part contacts the
circumferential end of the ball bearing.
• When installing the idle gear 1, be sure to align the
alignment marks on each gear.
Idle gear 2 lock nut
Tightening torque
Idle gear 2 bearing nut
(1) Lock Nut
(2) Bearing Nut
(3) Taper Roller Bearing
(4) Cir-Clip
(5) Idle Gear 2
(6) Idle Gear Shaft
(7) Cam Gear
(8) Camshaft
(9) External Snap Ring
(10) Idle Gear 1
(11) Bearing Nut Finger Socket
(12) Fuel Cam Gear
(13) Governor Gear
(14) Crank Gear
1-S37
ENGINE
25 to 29 N·m
2.5 to 3.0 kgf·m
18 to 21 lbf·ft
35 to 39 N·m
3.5 to 4.0 kgf·m
26 to 28 lbf·ft
(15) Stopper
(16) Fuel Camshaft
(17) Ball Bearing
(18) External Snap Ring
(19) Ball Bearing
(20) Governor Shaft
(21) Set Screw
(a) Alignment Mark: Idle Gear 1 and
Cam Gear
(b) Alignment Mark: Idle Gear 1 and
Crank Gear
(c) Alignment Mark: Idle Gear 1 and
Fuel Cam Gear
9Y1210982ENS0065US0
KiSC issued 03, 2014 A