G424 Service Manual LPG Fuel System81
LP Converter - Check, Clean
Test LP-Gas Converter
1. Obtain a test kit.
2. Start engine.
3. Close the liquid outlet valve in the fuel storage
container.
4. Run engine out of fuel.
5. Install the 0-30kPa (0-5 psi) gauge in the primary
test port.
6.. Install the 0-2.5kPa (0-10 in H
2
O) gauge in the
secondary test port.
7. Slowly open the liquid outiet valve in the fuel
storage container.
8. Start the engine.
9. Operate the engine at idle, part throttle and full
load.
10. Observe readings on both gauges.
11. The primary gauge reading should be
approximately 10.3kPa (1.5 psi).
12. The secondary gauge should read
approximately negative0.1kPa (0.5 in H
2
O) to
negative 2.5kPa (10 in H
2
O).
13. If readings are out of specification, as required.
LP-Gas Converter
Inspect Converter for Oil Accumulation
1. Start engine.
2. Close the liquid outlet valve in the fuel storage
container
3. Run engine out of fuel.
4. Remove the regulator secondary cover.
5. Remove secondary diaphragm.
6. Remove any concentrations of oil from the
secondary chamber with soap and warm water.
7. If required, replace them with LP converter
service kit.
8. Apply anti-seize compound to screw threads.
9. Re-assemble regulator in reverse order.
10. Slowly open the liquid outlet valve in the fuel
storage container.
11. Start engine.
12. Perform leak test.
Secondary
Test Port
Primary Test Port
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