Kubota M5040, Workshop Manual

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9-M15
M5040, M6040, M7040, WSM ELECTRICAL SYSTEM
(2) CABIN Model
W1013253
There are four key positions, “OFF” , “ACC” , “ON” and “START” on the main switch as shown above.
When the main switch is set to “ACC” (accessory), the radio, windshields wiper, work lights (front and rear), cigar
lighter and blower fan can be used.
When the main switch is set “ON” , terminal AM of the main switch is connected to terminal ACC and terminal M .
As a result, the battery current flows to the key stop relay (11) and the contact points of relay turned on “ON”
position, and the key stop solenoid (12) is actuating for governor linkage, and linkage are connecting to the stop lever
of injection pump, and stop lever move into
“START” position.
When the main switch is set to “START” under the condition that the shuttle shift lever is neutral position and the
safety switch (7) is turned on the PTO lever is in “OFF” position (PTO switch (10) is pushed to “ON” ). Terminal AM
of the main switch is connected to terminal M and terminal ST . Consequently, battery current flows to safety switches
(7), (10), coil of starter relay (3), PTO safety relay (9). (When the PTO switches is set to “OFF” , battery current flows
PTO switch (10) and coil of PTO safety relay (9).
This actuates starter (2).
When the main switch is released after starting the engine, the main switch returns to
“ON” automatically. This
stops the starter. Fuel supply and fuel stop to and from the injection pump are carried out by the key stop relay (11)
and engine stop solenoid (12).
(1) Battery
(2) Starter Motor
(3) Starter Relay
(4) Alternator
(5) Glow Relay
(6) Glow Plug
(7) Neutral Safety Switch
(Shuttle)
(8) Main Switch
(9) PTO Safety Relay
(10) PTO Switch
(11) Key Stop Relay
(12) Key Stop Solenoid
(13) Engine Stop Relay
(14) Slow Blow Fuse
(a) To Meter Panel
(b) To Radio
(c) To Air Conditioner
Controller
(d) To Wind Shield Wiper
KiSC issued 06, 2008 A