Yanmar YM276 Service Manual page 551

Startina Circuit
240-1 5-5
n
CIRCUIT TESTS
The figure (right) shows components of starting system.
I f no
current reaches switch terminal of solenoid when key switch i s in
start position, fault could be in any component or connection.
Make simplest checks first.
1.
If any electrical equipment works, circuit is good from batteries
t o key switch. If not, check batteries, battery cable con-
nections, and starter connections.
2. Turn key switch "ON". If lights work, key switch is probably
not defective. Remove and test switch only if problem cannot
be found elsewhere.
A
CAUTION: Be positive that transmission i s in neutral before
urlng jumper wire. Unless you want engine t o start. p l x e
throttle lever in "STOP' position.
A
-
B a n a y
E
-
Rear PTO
B
-
Starting Motor
Start Safety
Switch
C
-
Clutch
Pedal
F
-
K y
Switch
Start
Safely
Switch
D
-
Front PTO
Start
Safely
Switch
n
3. Connect a jumper wire to battery terminal on starting motor.
Briefly touch jumper wire to switch terminal. Starting motor
should engage. If it does not, problem is in solenoid or starting
motor.
4. Test start safety switch on clutch pedal with a test light or
ohmmeter. The switch should close only when the clutch pedal
i s depressed.
5.
Repeat for the start safety switch on the rear PTO shift lever.
CAUTION: DO NOT attempt to start tractor by depressing
Adu,h
pedal by hand while standing on ground, out of operators
station.
SME27601IlBJOd VM276 and Z76D
Kinwnofo, Printed in Japan