Doosan DV11 User Manual (English)

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DV11

Operation and Maintenance

149

Common Rail Fuel-injection System

Printed in Mar. 2005 PS-MMA0608-E1A

3.6.9. Troubleshooting

1) Inspection procedures

If the engine brake is not operating properly, the first step is to identify whether

the problem is electrical or mechanical. First check for correct electrical operation

of the brake, and then examine mechanical components as necessary.

2) Electrical power supply

Vehicle supply voltage must be at least 18 VDC at the solenoid valves when the

engine brake is turned on. If voltage is insufficient, or an electrical short circuit

exists, these problems must be corrected before the engine brake will operate

properly.

3) Solenoid valve

If there is electrical power at the solenoid valve but the engine brake housing

does not operate, the solenoid valve may be defective. The solenoid valve cannot

be overhauled or repaired. If the solenoid valve is defective, it must be replaced.

CAUTION:

Do not touch the electrical connection when a solenoid is energized. Electrical

shock could result.

4) Resistance check

Disconnect the wires from the solenoid valve. Connect an ohm meter to the

terminals of the solenoid valve and measure the electrical resistance of the valve.

Resistance should be 32.6 to 39.8 Ohms. If resistance is not within this range,

replace the solenoid valve.

Solenoid

resistance value

32.6 ~ 39.8 Ω less

5) Visual check

If the proper meters are not available, check for proper solenoid valve operation

as follows: connect a wire supplying 24-volts to either solenoid electrical terminal.

Connect the other electrical terminal to a good chassis ground. When electrical

power is applied, make sure the pin on the top of the solenoid valve depresses. If

the pin does not depress, replace the solenoid.

6) Mechanical or hydraulic

If the solenoid valves are working properly, the problem is likely inadequate oil

supply or mechanical problem.

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Doosan DV11 Specifications

General

Engine Model	DV11
Number of Cylinders	6
Bore x Stroke	123 mm x 155 mm
Compression Ratio	17.0:1
Fuel System	Common Rail
Fuel Type	Diesel
Emissions Compliance	Tier 4 Final / Stage IV
Total Displacement	10.96 L
Aspiration	Turbocharged, Intercooled
Engine Type	4-cycle, water-cooled, diesel engine