Fuel Systems - Kohler 6VSG Service Manual

If the resistance is very low (indicating a short circuit)
or very high (indicating an open circuit), replace the
CTS.
Note: Because the temperature sensor can be difficult
to reach, the resistance can be measured
across pins 9 and 10 on connector P1 at the
generator set controller, if desired. Disconnect
P1 from the controller before checking the
resistance across P1-9 and P1-10.
Note: The temperature sensor is located in the engine
oil pan. Drain the engine oil before removing
the switch.
Figure 5-21
Temperature, °C (°F)
30 (86)
100 (212)
Figure 5-21 Temperature Sensor CTS Resistance
Readings
Low Oil Pressure (LOP) Switch
The low oil pressure (LOP) switch is located under the
engine air cleaner. See Figure 5-22. The oil pressure
switch should be closed when the engine is stopped
(no oil pressure) and open when the engine is running.
Before testing the LOP switch, check the oil level and
add oil if necessary. Inspect the generator set engine
for evidence of oil leaks.
To test the LOP switch:
1. Press the OFF button to stop the engine.
2. Disconnect lead 13 from the switch.
3. Use an ohmmeter or continuity tester to verify
that the switch is closed (connected to the engine
block).
4. Start the engine and verify that the switch opens
after a few seconds.
If the LOP switch does not operate as described
above, use a gauge to check the oil pressure:
1. Press the OFF button to stop the engine.
2. Remove the LOP switch and install an oil
pressure gauge.
3. Start and run the generator set.
4. Verify that the engine oil pressure is within the
range specified in Section 1, Specifications,
before replacing the LOP switch.
78 Section 5 Component Testing and Adjustment
Resistance, Ohms
2100–2400
180–200
Figure 5-22
1. Oil pressure switch
Figure 5-22 Oil Pressure Switch Location (under the
air cleaner)

5.8 Fuel Systems

!
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
The fuel supplier provides and maintains manual
shutoff valves and the primary regulator.
generator set installation manual for fuel pipe size
recommendations. Verify that the fuel system capacity
is adequate to supply the generator set plus all other
gas appliances.
A factory-installed secondary regulator and 12 VDC
solenoid valve are located in the front air intake
compartment. The controller energizes the fuel
solenoid valve to open at startup and deenergizes the
valve to close at shutdown.
regulator reduces fuel pressure for delivery to the fuel
block. The fuel flows from the fuel block to the
carburetor in a gaseous state. The carburetor mixes
the fuel with intake air for consumption by the engine.
Refer to the troubleshooting instructions in Section 4,
Troubleshooting, to identify generator set operation
problems that may be caused by an inadequate fuel
supply, incorrect adjustments, or damaged fuel system
components. Then use the instructions in this section
to check fuel system components.
1
WARNING
See the
The secondary fuel
TP-6844 1/13
KPS_089