Kohler Command PRO CH270, Руководство по обслуживанию

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8.11
Section 8
Electrical System and Components
8
Problem Test Conclusion
Starter
Motor Does
Not Operate
With Key
Switch
1. Test ba tt ery on unit.
a. Connect a DC voltmeter across the ba tt ery
terminals and read ba tt ery voltage (key
switch OFF ).
b. Turn key switch to start position and read
ba tt ery voltage again. Turn switch OFF .
1. a. Ba tt ery voltage should be at least 12
volts . If low charge ba tt ery.
b. Ba tt ery voltage should not fall below
9 volts during cranking. If it does,
ba tt ery may be faulty or there may
be a short in the starting circuit.
Have ba
tt ery load tested. If ba tt ery
passes load test, check circuitry.
2. Remove the electric starter cover panel and
check the fuse inside the plastic holder. The fuse
outside the holder is a spare.
2. If fuse is blown, check for a wiring
problem (bare wire, short circuit).
Correct problem and replace fuse. Try
to start engine. If it still won’t start, go
to Step 3.
3. Disconnect the blue relay lead. Be sure
transmission is in neutral and PTO is OFF .
Connect one end of a jumper lead to the positive
terminal of the ba
tt ery. Connect the other end to
the terminal of the relay.
3. If relay engages and starter begins
to crank, the key switch is faulty, or
there is a wiring problem to/from the
key switch. Check wiring and test key
switch circuits with an ohmmeter.
4. Use a known, good, fully-charged ba tt ery and
jumper cables to test starter motor. Be sure the
transmission is in neutral and PTO is
OFF .
Remove the heavy lead from the post terminal
on the starter. Connect one end of the positive
jumper cable to the post terminal and connect
the other end to the positive terminal of the
ba
tt ery.
Connect one end of the negative jumper cable
to the negative terminal of the ba tt ery. Touch
the other end of the negative jumper cable to a
bare surface on the crankcase or to the starter
housing.
4. When negative jumper cable is
touched to crankcase or starter
housing, starter motor should operate.
If it does, continue with Step 5. If
starter does not operate, refer to the
servicing procedures for the starter
motor. Repair or replace as required.
5. Disconnect the leads from the starter relay and
remove it from the starter for testing.
a. Set an ohmmeter on the Rx1 scale and zero
the meter. Connect one ohmmeter lead to
the terminal of the blue lead from the relay.
Connect the other ohmmeter lead to the relay
mounting bracket.
b. With the ohmmeter still on the Rx1 scale,
connect the leads to the two large post
terminals.
c. Leave the ohmmeter leads connected to
the large terminals. Connect a jumper lead
from the positive terminal of the ba
tt ery to
the terminal of the blue relay lead. Connect
another jumper lead from the negative
terminal of the ba
tt ery to the relay mounting
bracket.
5. a. The resistance of the energizing
coil should be at least 3.4 ohms. If
the meter reading is less than 3.4
ohms, or an open circuit is indicated
(in
fi nity ohms), the relay is faulty
and must be replaced.
b. The meter should indicate an open
circuit (in fi nity ohms, no continuity).
c. When the circuit is completed,
applying 12 volts to the energizing
coil, an audible click should be
heard as the relay engages, and the
ohmmeter should then indicate
continuity between the large
terminals. If the results are other
than indicated, replace the relay.
Troubleshooting Guide - Electric Starting System