Doosan P185WJD - User Manual

Questions and Answers

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Matthew BishopAug 4, 2025
What to do if my Doosan P185WJD Air Compressor won’t start/run?
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  Troy BirdAug 4, 2025
  If your Doosan Air Compressor won’t start or run, start by adding clean diesel fuel if you are out of fuel. If the fuel filters are clogged, service them. If the compressor oil level is too low, add the correct oil. Check for loose wire connections and repair or replace them. Also, check the battery voltage and electrolyte level, ensuring good connections. If the voltage at the shutdown solenoid is less than 10 volts, charge the battery and alternator, making necessary repairs. Other potential issues include a defective alternator (replace or repair), a malfunctioning start switch, or a defective D2 diode, each requiring replacement. Finally, check for blown fuses and replace them, looking for any shorts.
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Lindsey AndersonAug 9, 2025
What causes low CFM in Doosan P185WJD Air Compressor and how to fix it?
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  yreedAug 9, 2025
  If your Doosan Air Compressor has a low CFM (cubic feet per minute) output, start by adjusting the engine RPM if it is too low. If the air cylinder is malfunctioning, replace it. Make sure that the linkage adjustment is correct. Inspect the inlet unloader valve for any issues. Clean or replace the air filter elements if they are dirty. If the pressure regulator adjustment is incorrect, adjust the linkage. Other potential issues include a malfunctioning pressure regulator (replace it), a wrong air filter element (install the correct element), a defective separator element (install a new element), or a defective minimum pressure valve (repair or replace the valve).
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Javier PhillipsAug 25, 2025
How to fix excessive vibration in Doosan P185WJD?
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  Jessica RodriguezAug 25, 2025
  If you notice excessive vibration in your Doosan Air Compressor, start by replacing the filters and fuel if they are dirty. If the engine idle speed is too low, raise the “No Load” speed. Check the rubber mounts for looseness or damage and tighten or replace them as necessary. If the anti-rumble valve is not working, repair or replace it. Inspect the drive coupling for defects and replace it if needed. Also, check the fan for defects and replace it if necessary.
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Maria GonzalezNov 12, 2025
How to troubleshoot excessive compressor oil temperature in a Doosan P185WJD?
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  Jonathan HarrisNov 13, 2025
  If your Doosan Air Compressor experiences excessive oil temperature, begin by cleaning the exterior surfaces of the cooler if it is dirty. If the oil level is low, add oil and check for leaks. Replace the oil filter elements and change the oil if the filter elements are clogged. Reduce the pressure to the specified level if the operating pressure is too high. Move the unit to a cleaner environment if operating conditions are dirty. Ensure the ambient temperature is not above 125°F (52°C). Relocate or reposition the unit if it is out of level by more than 15 degrees. Verify you are using the correct lube oil. Close the side doors and replace the belly pan if there is recirculation of cooling air. Other potential issues include a malfunctioning thermostat (replace the thermostat in the bypas...
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Christine YoungNov 18, 2025
Why does my Doosan P185WJD Air Compressor unit shutdown?
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  kenneth41Nov 18, 2025
  If your Doosan Air Compressor unit shuts down, it might be due to several reasons. You may be out of fuel, so add clean diesel fuel. The compressor oil level might be too low, so add the correct oil. The engine water temperature could be too high, so check the coolant level and add if necessary. There might be a loose wire connection, so wiggle wires at switches and connector blocks, making repairs as needed. Other potential causes include a defective discharge air temperature switch, a defective engine oil pressure switch, or a broken engine fan belt, each requiring switch or belt replacement. Also, check for a defective shutdown solenoid or a malfunctioning relay, replacing them if necessary. A blown fuse could also be the culprit, so replace the fuse and check for a short. Finally, ensu...
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David RodriguezDec 1, 2025
Why is the engine RPM down on my Doosan P185WJD Air Compressor?
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  Claudia EscobarDec 1, 2025
  If your Doosan Air Compressor's engine RPM is down, it could be due to several factors. Start by cleaning the primary fuel filter, replacing the final fuel filter, draining the tanks, and adding clean fuel if the fuel filter is clogged. If the air filter is dirty, clean or replace the elements. Reduce the pressure to the specified limit if the operating pressure is too high. Other potential issues include an incorrect pressure regulator adjustment (adjust the regulator), an incorrect linkage adjustment (adjust the linkage), a wrong air filter element (install the correct element), a malfunctioning pressure regulator (replace the regulator), or a malfunctioning air cylinder (replace the air cylinder and adjust). Finally, check for a defective separator element and install a new one if neede...