TP-6735 7/1784 Section 5 Component Testing and Adjustment
10. After several minutes, note the air/fuel ratio meter
measurements and compare to the (lambda)
values in Figure 5-35.
Fuel system
Air/Fuel Mixture
Values
UEGO Sensor
Reading, VDC*
Original
(Figure 5-27)
0.944--0.966 2.70 ± 0.05
Revised
(Figure 5-28)
0.923--0.944 2.60 ± 0.05
* UEGO sensor readings shown for reference
Figure 5-35 Acceptable Oxygen Sensor Readings,
14RES/RESL
11. Adjust the fuel metering valve as required to obtain
the output from the oxygen sensor specified in
Figure 5-35.
12. When the fuel mixture is correct, use thread
sealant to seal the metering valve adjustment
screws.
13. Remove the load and allow the generator set to run
unloaded to cool for at least 5–10 minutes.
14. Stop the generator set by pressing the OFF button
on the controller and remove controller fuse F3.
15. Disconnect the generator set engine starting
battery, negative (--) lead first.
16. Allow the generator set exhaust system to cool.
17. Disconnect the DVM leads from the oxygen
sensor.
18. After the sensor has cooled, remove the oxygen
sensor from exhaust manifold.
19. Apply a small amount of antiseize compound to
exhaust plug and reinstall the plug into the exhaust
manifold.
20. Reconnect the generator set engine starting
battery, negative (--) lead last.
21. Reinstall controller fuse F3.
22. Reconnect power to the battery charger.
5.12 Starter Relay
The starter relay is located under the controller. See
Figure 5-36.
1
GM66566
1. Starter relay
Figure 5-36 Starter Relay Location
The starter relay contains an internal diode across the
relay coil. See Figure 5-37. Continuity checks across
the coil terminals will show continuity (low resistance) in
one direction and an open circuit in the other.
Figure 5-38 shows the starter relay connections.
259391
Figure 5-37 Starter Relay
Relay Terminal Lead
30 14P
85 N7
86 71
87 14S
87A NC
Figure 5-38 Starter Relay Connections
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