Doosan Dual Fuel Engine GC15S-5

• Visually inspect coolant hoses and clamps. Remember to check the two coolant lines that connect to the pressure regulator/converter.

• Replace any hose that shows signs of leakage, swelling, cracking, abrasion or deterioration.

1. After the coolant temperature drops below 38°C loosen the radiator cap.

2. Check that the coolant level reaches filler neck.

3. Install the radiator cap tester to the radiator filler neck and apply a pressure of 1.4kg/cm2 . While maintaining it for 2 minutes, check the radiator, hose, and connecting part for leak.

!CAUTION: Because the coolant in the radiator is too hot, never open the cap when it hot, or injury may occur due to an outburst of hot water. Dry out the inspection part. When removing the tester, take care not to spill the coolant.

When removing/installing the tester as well as testing, take care not to deform the filler neck.

Pressure Regulator/Converter Inspection

Pressure regulator/converter visually inspected for coolant leaks

Fuel Trim Valve Inspection (FTV)

Fuel trim valves visually inspected for abrasions or cracking

Fuel trim valves replaced if necessary

Blow-by test for Fuel Trim Valves

Electrical connector to the FTVs disconnected

Vacuum line from the FTVs to the pressure regulator/converter disconnected at the converter’s tee connection

Air blown through the vacuum line connected to the FTVs

• Remove and inspect the spark plugs. Replace as required.

• Inspect the ignition coil for cracks and heat deterioration. Visually inspect the coil heat sink fins. If any fins are broken replace as required.

Park the lift truck in an authorized refueling area with the forks lowered, parking brake applied and the transmission in Neutral.

Close the fuel shutoff valve on the LP-fuel tank. Run the engine until the fuel in the system runs out and the engine stops.

Scribe a line across the filter housing covers, which will be used for alignment purposes when re-installing the filter cover.

Remove the cover retaining screws (1).

Remove top cover (2), magnet (3), spring (4), and filter element (7) from bottom cover (5).

Replace the filter element (7).

Check bottom cover O-ring seal (6) for damage. Replace if necessary.

Warning: Never remove the pressure cap on a hot engine.

Coolant level is equal to the 'COLD' mark on the coolant recovery tank

Did you add approved coolant to the specified level if the system was low?