Doosan P185WJD-T4I User Manual

Doosan P185WJD-T4I

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Doosan Infracore Portable Power

1293 Glenway Drive

Statesville, N.C. 28625

www.doosanportablepower.com

Book: 46490694 (3-2010) Rev A

This manual contains important safety information.

Do not destroy this manual.

This manual must be available to the personnel who operate and maintain this machine.

OPERATION, MAINTENANCE,

COMPRESSOR MODEL

P185WJD-T4I (D75)

MANUAL

Revised (10-12)

Doosan purchased Bobcat Company from Ingersoll-Rand Company in

2007. Any reference to Ingersoll-Rand Company or use of trademarks,

service marks, logos, or other proprietary identifying marks belonging

to Ingersoll-Rand Company in this manual is historical or nominative

in nature, and is not meant to suggest a current affiliation between

Ingersoll-Rand C

ompany and Doosan

Company or the products of

e

ith

er.

Questions and Answers:

J
Janet MullinsAug 16, 2025
Why won't my Doosan P185WJD-T4I start?
- J
  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.
L
lbellAug 19, 2025
What to do if my Doosan P185WJD-T4I has low CFM?
- L
  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.
S
sarahmeyersAug 28, 2025
What causes a low fuel shutdown (Option) SECU CODE 8 on a Doosan P185WJD-T4I?
- K
  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.
M
morenoamandaAug 31, 2025
How to fix excessive vibration in my Doosan P185WJD-T4I?
- S
  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.
W
wayne90Sep 3, 2025
Why does the safety valve relieve on my Doosan P185WJD-T4I?
- W
  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.
B
Brian RuizSep 6, 2025
What causes a Doosan P185WJD-T4I Air Compressor to not unload?
- C
  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.
J
Janice AndersonSep 9, 2025
What causes an oil seal leak in my Doosan Air Compressor?
- R
  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.
J
Jordan TaylorSep 12, 2025
What does 'Engine Model Not Recognized Alert SECU CODE A' mean on my Doosan P185WJD-T4I Air Compressor?
- E
  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.

Doosan P185WJD-T4I Specifications

General

Brand	Doosan
Model	P185WJD-T4I
Category	Air Compressor
Language	English

Summary

DRAWBAR NOTICE

DRAWBAR NOTICE (Important)

Instructions for converting the drawbar from shipping to towing position.

Safety

Safety Precautions

General safety guidelines and warnings for operating and maintaining the compressor.

Noise Emission

Noise Emission Control Information

Information regarding noise control systems and compliance with regulations.

Noise Emission Warranty

Warranty details related to the compressor's noise emissions.

GENERAL DATA

Unit Model Details

Specifications for the compressor unit model, including capacities and weights.

Expendable Service Parts

List of common service parts and their part numbers for the unit.

OPERATION

BEFORE TOWING

Instructions and safety warnings for towing the compressor unit.

CONTROL PANEL

Identification and description of gauges and switches on the control panel.

Before Starting

Pre-start checks and safety warnings before operating the compressor.

MAINTENANCE

Scheduled Maintenance

Overview of the maintenance schedule based on operational hours.

Maintenance Schedule

Comprehensive schedule for daily, weekly, monthly, and interval maintenance tasks.

LUBRICATION

Portable Compressor Fluid Chart

Charts detailing correct compressor fluid selection based on pressure and temperature.

Troubleshooting

Introduction to Troubleshooting

Overview of troubleshooting methodology and approach.

Machine Shutdown Troubleshooting

Table of causes and corrective actions for machine shutdown events.

Machine Will Not Start Troubleshooting

Table of causes and corrective actions for startup failures.

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