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2. Disconnect power to battery charger, if equipped.
3. Disconnect the generator set engine starting
battery, negative (--) lead first.
4. Allow the generator set to cool.
5. Install the oxygen sensor in the exhaust manifold at
the location shown in Figure 2-15.
1. Exhaust manifold pipe plug
Figure 2-15 Oxygen Sensor Mounting Location
6. Connect a manometer to check the fuel supply
pressure on the supply side of the fuel solenoid
valve. See Figure 2-7.
7. Connect the oxygen sensor harness as directed in
the instructions provided with oxygen sensor kit.
8. Check that the generator set master switch is in the
OFF position.
9. Reconnect the generator set engine starting
battery, negative (--) lead last.
10. Place the controller master switch in the RUN
position to start generator set.
11. Adjust the fuel supply pressure with the generator
set running at full load. Rotate the adjustment
screw on the primary fuel regulator until the
manometer indicates a fuel pressure of 7--11 in.
water column. Pressures below 7 in. water column
may result in poor response to load changes or lack
of power.
12. Reinstall the cover plug.
13. Check the fuel connections for leaks with the
generator set running.
XP-6341 6/10
14. Use a digital multimeter to check the output voltage
15. Allow the generator set to run until the generator
16. With the generator set at normal operating
17. Adjust the fuel mixture adjustment screw (on the
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1. Fuel mixture adjustment screw (full load)
2. Idle adjustment screw (no load)
Figure 2-16 Fuel Mixture Adjustment Screw Location
and frequency. Verify 120 volts line-to-neutral and
60 Hz output.
set reaches normal operating temperature. The
time
required
to
reach
temperature depends primarily on the ambient
temperature and the size of the engine.
temperature, apply 90%--100% of rated load. If a
load bank is not available, apply a load at least
comparable to what is generally connected to the
generator set.
mixer, see Figure 2-16) to obtain a full load oxygen
sensor voltage reading of 2.5 ±0.10 VDC (or a
lambda λ value of approximately 1.0 as indicated in
the instructions provided with the oxygen sensor
kit.
If the oxygen sensor voltage reading is too low with
the fuel mixture adjustment in the richest position
(turned in clockwise), turn the fuel regulator
adjustment screw clockwise and readjust the fuel
mixture adjustment screw.
If the oxygen sensor voltage reading is too high
with the fuel mixture adjustment in the leanest
position (turned out counterclockwise), turn the
fuel regulator adjustment screw counterclockwise
and readjust the fuel mixture adjustment screw.
1
2
Section 2 Installation Instructions
normal
operating
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