Function Of Key Switch; Specification Of Key Switch; Starter (Planetary Gear Reduction Type); Outline Of Starter (Planetary Gear Reduction Type) - Kubota D1803-CR-E4 Workshop Manual

MECHANISM
8. Electrical system

8.6.3 Function of key switch

Key switch posi-
tion
• Power supply is turned OFF and en-
OFF gine is stopped
• Key can be inserted and removed
• All electrical equipment can be used
• Engine operating position
ON
• Pre-heats combustion chamber (de-
pending on vehicle type)
• Starters rotates and starts the engine
Start (ST) • When the hand is removed it automat-
ically returns to the ON position
• Accessories can be used while engine
ACC
is stopped
• Pre-heats engine combustion cham-
Preheat (glow)
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
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
Operation
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
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.
4. ENGINE
(6) Gear shaft
(7) Internal gear
(8) Pinion gear
(9) Armature shaft
4-71
KiSC issued 12, 2018 A