Starter Switch - Kubota WG1605-G-E3 Workshop Manual

WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
[B] Overrunning Clutch
Function
In case that the pinion gear and ring gear are still inter meshed even when the engine is started, the motor will be
forced to run in abnormal rotation, and the armature, brush, etc. will be damaged.In order to prevent such an error,
the overrunning clutch will function as the device to let the pinion race against the armature shaft when the engine is
started, and to shut off transmission of rotation of the engine to the motor.

(3) Starter Switch

Action
1. When starting:
If the outer is rotated in the arrow mark direction
receiving rotation of the armature, the clutch roller
will be pushed toward the narrower side of clearance
between the outer concave side and the inner so that
the outer and inner will be locked. The roller will
function as a wedge between the inner and outer,
and will transmit the rotation of the outer to the inner,
and both will rotate in the same speed.
2. After the engine is started:
When the pinion is forced to rotate by the ring gear,
rotation of the inner (rotation of engine x gear ratio)
will become faster than that of the outer (a number of
rotation of armature), and the clutch roller will move
toward the direction that compresses the spring.
Consequently, clearance between the outer concave
side and the inner becomes wide to prevent
overrunning of the armature.
(It is required to decrease the contact pressure of the
pinion gear and ring gear to realize smooth
separation of the pinion gear, and for the sake of this,
the pinion gear must be in the state of racing.)
(1) Outer (Integral Structure with
Spline Tube)
(2) Clutch Roller
Starter Switch
Starter switch is an important part comprising of the
starting device of engine. Particularly, as seizing of the
starter may be incurred due to failure of the starter
switch, careful consideration is required for the
installation position, place, and direction, so that rain or
cleaning water should not directly splash on the starter
switch.
As the standard part of KUBOTA engine, the starter
switch in below figure is recommended.
[Connection Diagram]
1-M21
ENGINE
9Y1210661ENM0044US0
(3) Inner (Integral Structure with
Pinion Tube)
(4) Pinion Gear
9Y1210661ENM0045US0
9Y1210661ENM0046US0
KiSC issued 01, 2012 A