Doosan P185WJD-T4I - User Manual

Questions and Answers

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Janet MullinsAug 16, 2025
Why won't my Doosan P185WJD-T4I start?
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  James DavisAug 16, 2025
  Your Doosan Air Compressor might not start due to several reasons: * It could be out of fuel; in this case, add clean diesel fuel. * There might be a low fuel shutdown; add clean diesel fuel. * The battery voltage could be low. * The airend discharge or separator temperature may be too high. * A fuse might be blown; replace the fuse and check the harness connection. * There may be an ignition switch, engine starter relay, engine starter, fuel solenoid, regulation pressure sensor, or SECU controller malfunction; check harness connections and replace the malfunctioning part. * There could be an engine ECM communication failure. * An engine fault may be present; refer to the Engine Diagnostic Codes section. * The generator switch might be in the generator position.
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lbellAug 19, 2025
What to do if my Doosan P185WJD-T4I has low CFM?
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  Linda BrownSep 12, 2025
  If your Doosan Air Compressor has low CFM, it could be due to several reasons: * The engine RPM might be too low; adjust the RPM. * The inlet unloader may be malfunctioning; inspect the valve. * The air filter could be dirty; clean or replace the elements. * The pressure regulator adjustment might be incorrect; adjust the linkage. * The pressure regulator may be malfunctioning; replace the regulator. * The air filter element could be wrong; install the correct element. * The separator element may be defective; install a new element. * The minimum pressure valve might be defective; repair or replace the valve. * There could be an air leak; find and repair the leak. * An orifice might be blocked; check and clean the orifice.
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sarahmeyersAug 28, 2025
What causes a low fuel shutdown (Option) SECU CODE 8 on a Doosan P185WJD-T4I?
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  Kathleen PriceAug 28, 2025
  A low fuel shutdown (Option) SECU CODE 8 on your Doosan Air Compressor could be triggered by: * Being out of fuel: add clean diesel fuel. * A disconnected jumper (standard machine): reinstall the jumper and refer to the wiring decal. * A low fuel shutdown/gauge sensor malfunction: check harness connections and replace the sensor. * SECU controller malfunction: check harness connections and replace the SECU controller.
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morenoamandaAug 31, 2025
How to fix excessive vibration in my Doosan P185WJD-T4I?
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  Stephanie MillerAug 31, 2025
  Excessive vibration in your Doosan Air Compressor could be caused by: * Dirty fuel or filters: replace the filters and fuel. * Engine idle speed being too low: raise the “No Load” speed. * Loose or damaged rubber mounts: tighten or replace them. * A non-working anti-rumble valve: repair or replace it. * A defective drive coupling: replace the coupling. * A defective fan: replace the fan. * Engine or airend malfunctioning: consult your dealer.
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wayne90Sep 3, 2025
Why does the safety valve relieve on my Doosan P185WJD-T4I?
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  William HernandezSep 3, 2025
  The safety valve on your Doosan Air Compressor might relieve because: * The operating pressure is too high: reduce the pressure to the specified limit. * The pressure regulator adjustment is incorrect. * The pressure regulator is malfunctioning: replace the regulator. * There is a leak in the regulator piping: repair the leak(s). * The inlet unloader is malfunctioning: inspect the valve and repair or replace it. * The separator element is defective: remove the element and install a new one. * The safety valve is defective: replace the safety valve. * There is ice in the regulation lines or orifice: remove the ice.
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Brian RuizSep 6, 2025
What causes a Doosan P185WJD-T4I Air Compressor to not unload?
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  Christopher DavisSep 6, 2025
  Your Doosan Air Compressor may not unload due to: * Incorrect pressure regulator adjustment: adjust the regulator. * A leak in the regulator piping: find and repair the leak(s). * A malfunctioning pressure regulator: replace the regulator. * A malfunctioning inlet valve unloader: inspect the valve and repair or replace it. * A defective separator element: remove the element and install a new one. * Ice in the regulation lines or orifice: apply heat to the line(s) and/or orifice.
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Janice AndersonSep 9, 2025
What causes an oil seal leak in my Doosan Air Compressor?
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  Robin FowlerSep 9, 2025
  An oil seal leak in your Doosan Air Compressor can be caused by: * Contaminated lube oil: drain and flush the system, add new CLEAN oil, and replace the seal. * A malfunctioning seal: consult your dealer and replace the seal. * A scored shaft: see instructions in the new seal kit.
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Jordan TaylorSep 12, 2025
What does 'Engine Model Not Recognized Alert SECU CODE A' mean on my Doosan P185WJD-T4I Air Compressor?
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  ericaserranoSep 12, 2025
  If you see an 'Engine Model Not Recognized Alert SECU CODE A' on your Doosan Air Compressor (electronic engine models only), it indicates that the engine speed is incorrect. In this case, replace the engine ECM.
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Perry SchwartzNov 21, 2025
What causes a Doosan P185WJD-T4I Air Compressor to have a high separator temperature shutdown (SECU CODE 2)?
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  Joseph CooperNov 21, 2025
  A high separator temperature shutdown (SECU CODE 2) in your Doosan Air Compressor can be caused by: * A dirty cooler: clean the cooler. * Low compressor oil level: add oil and check for leaks. * Clogged compressor oil filter elements: replace the elements and change the oil. * Operating pressure being too high: reduce the pressure setting to within specification. * Recirculation of cooling air: close side doors and relocate the machine to ensure cool intake air. * Dirty operating conditions: relocate the machine to a cleaner environment. * The machine being out of level by more than 15 degrees: relocate or level the machine. * Ambient temperature exceeding 120°F (49°C): this is above the specification limit. * Wrong compressor lube oil: check the oil specification in thi...
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christine83Nov 24, 2025
What causes a high engine coolant temperature shutdown (SECU CODE 4) in a Doosan P185WJD-T4I?
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  Brooke ClarkeNov 24, 2025
  A high engine coolant temperature shutdown (SECU CODE 4) in your Doosan Air Compressor may occur due to: * A dirty cooler: clean the cooler. * Dirty operating conditions: relocate the machine to a cleaner environment. * The machine being out of level by more than 15 degrees: relocate or level the machine. * Ambient temperature exceeding 120°F (49°C): this is above the specification limit. * Recirculation of cooling air: close side doors and relocate the machine to ensure cool intake air. * Operating pressure being too high: reduce the pressure setting to within specification. * Loose or broken belts: tighten the belts or replace the belt set. * Engine thermostat malfunction: replace the thermostat. * Engine malfunction: consult your dealer. * Engine coolant temperature...