Doosan D50S-5 Operation & Maintenance Manual page 192

Point Point
(1) SCREW (1) SCREW
4. 4. Remove the cover retaining screws (1) Remove the cover retaining screws (1)
Maintenance Section Maintenance Section
Testing Fuel Lock-off Operation Testing Fuel Lock-off Operation
(LP Engine Only) (LP Engine Only)
Start engine. Start engine.
 
Locate the electrical connector for the fuel lock Locate the electrical connector for the fuel lock
 
Disconnect the electrical connector. Disconnect the electrical connector.
 
The engine should run out of fuel and stop The engine should run out of fuel and stop
 
within a short period of time. within a short period of time.
Turn the ignition key switch off and re-connect Turn the ignition key switch off and re-connect
 
the fuel lock-off connector. the fuel lock-off connector.
NOTE: NOTE: The length of time the engine runs on The length of time the engine runs on
trapped fuel vapor increases with any trapped fuel vapor increases with any
increase in distance between the fuel lock increase in distance between the fuel lock
-off and the pressure regulator/converter. -off and the pressure regulator/converter.
8. 8. Re-assemble the filter assembly aligning the Re-assemble the filter assembly aligning the
scribe lines on the top and bottom covers. scribe lines on the top and bottom covers.
9. 9. Install the cover retaining screws, tightening the Install the cover retaining screws, tightening the
screws in an opposite sequence across the cover. screws in an opposite sequence across the cover.
10. 10. Open the fuel valve by slowly turning the valve Open the fuel valve by slowly turning the valve
counterclockwise. counterclockwise.
11. 11. Crank the engine several revolutions to open the Crank the engine several revolutions to open the
fuel lock-off. DO NOT START THE ENGINE. fuel lock-off. DO NOT START THE ENGINE.
Turn the ignition key switch to the off position. Turn the ignition key switch to the off position.
12. Check the filter housing, fuel lines and fittings for 12.
Check the filter housing, fuel lines and fittings for
leaks. Repair as necessary. leaks. Repair as necessary.
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