8.6.3 Function of key switch
Key switch posi-
tion
Operation
OFF
• Power supply is turned OFF and en-
gine is stopped
•
Key can be inserted and removed
ON
• All electrical equipment can be used
• Engine operating position
• Pre-heats combustion chamber (de-
pending on vehicle type)
Start (ST)
• Starters rotates and starts the engine
• When the hand is removed it automat-
ically returns to the ON position
ACC
• Accessories can be used while engine
is stopped
Preheat (glow)
• Pre-heats engine combustion cham-
ber (depending on vehicle type)
8.6.4 Specification of key switch
Specification is different depending on the OEM
installed so
reference the installed OEM specification
for details.
A standard contact connections table for Kubota is
given below.
Contact connections table
8.7 Starter (Planetary gear reduction
type)
8.7.1 Outline of starter (planetary gear
reduction type)
The starter uses electric power from the battery to start
the engine.
8.7.2 Structure of starter (planetary gear
reduction type)
The starter is made up of a magnet switch, various
gears, and shaft and the like.
(1) Front bracket
(2) Drive lever
(3)
Magnetic switch
(4) Pinion gear
(5) Overrunning clutch
(6) Gear shaft
(7) Internal gear
(8) Pinion gear
(9) Armature shaft
8.7.3 Function of starter (planetary gear
reduction type)
The starter uses electric power from the battery to start
the engine.
Start flow
1. When the
key switch is rotated to the start position,
current flows from the battery to the starter.
2. Upon receiving current, the starter motor rotates
and a pinion gear engages and starts to rotate.
3. The pinion gear that engages meshes with the ring
gear (flywheel) and causes the flywheel to rotate.
4. The crankshaft that is connected to the flywheel
rotates, initial combustion occurs in the engine and
the engine starts.
MECHANISM
8. Electrical system 4. ENGINE
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
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