Doosan C185WKU-T2 - User Manual

Questions and Answers

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Christian PorterAug 20, 2025
What to do if Doosan Air Compressor unit fails to shutdown?
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  Steven SalinasAug 20, 2025
  If your Doosan Air Compressor unit fails to shutdown, it could be due to several reasons. A defective discharge air temperature switch, separator temperature switch, engine temperature switch, or engine oil pressure switch could be the cause; in any of these cases, replace the switch. Alternatively, a defective shutdown solenoid might be the issue; carefully block the air inlet to stop the engine. A malfunctioning relay can also cause this problem, so replace the relay. If the start switch is defective, pull the wire off the shutdown solenoid and replace the defective item. Lastly, a wire shorted hot can prevent shutdown; repair the short.
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Janice GibsonNov 5, 2025
Why does my Doosan C185WKU-T2 Air Compressor unit shutdown?
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  qbrownNov 5, 2025
  If your Doosan Air Compressor unit shuts down, several factors could be the cause. It might be due to a blown fuse, in which case you should replace the fuse and check for any shorts. Alternatively, a loose wire connection could be the culprit; inspect the wires at the switches and connector blocks, making necessary repairs. If the engine oil pressure is too low, check the engine oil level and add oil if needed. Also, check the coolant level if the engine water temperature is too high, and add coolant if necessary. If the unit is out of fuel, add CLEAN diesel fuel. Other potential causes include a malfunctioning relay (replace the relay), a defective discharge air temperature switch (replace the switch), a defective engine oil pressure switch (replace the switch), or a broken engine fan be...
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edwardsashleyNov 12, 2025
Why my Doosan C185WKU-T2 Air Compressor won’t start/run?
- S
  summersjuanNov 12, 2025
  If your Doosan Air Compressor won't start or run, there are several potential causes. First, ensure that the unit has enough fuel by adding CLEAN diesel fuel. If the fuel filters are clogged, service them. Check the compressor oil level and add the correct oil if it's too low. Inspect for loose wire connections and repair or replace them as needed. Verify the battery voltage is adequate, checking both the electrolyte level and the connections. Other possible causes include a defective alternator (replace or repair), high engine water temperature (check and add fluid if necessary), a malfunctioning start switch (replace the switch), or a defective D2 diode (replace the diode). Also, check for a blown fuse and replace it, looking for any shorts. If the engine oil pressure is too low, check t...
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Jennifer FrenchNov 27, 2025
How to troubleshoot high compressor oil temperature in Doosan Air Compressor?
- G
  gomezaprilNov 28, 2025
  High compressor oil temperature in your Doosan Air Compressor can stem from various issues. A dirty cooler can cause this; clean the exterior surfaces. Low oil level is another potential cause; add oil and check for leaks. If the oil filter elements are clogged, replace them and change the oil. Ensure the operating pressure isn't too high; reduce it to the specified level. Dirty operating conditions can also contribute; move the unit to a cleaner environment. If the ambient temperature is above 120°F (49°C), it exceeds the specification limit. If the unit is out of level by more than 15 degrees, relocate or reposition it. Confirm you're using the correct lube oil by checking the specifications in the manual. Other causes include recirculation of cooling air (close the canopy and replace th...

Summary

Operation, Maintenance, and Manual Overview

Foreword

Manual Purpose and Scope

Introduction to the manual, its purpose, scope, and important notes for the operator.

Drawbar Notice and Conversion

Drawbar Conversion Procedure

Step-by-step guide for converting the drawbar from shipping to towing position, including safety.

Safety Information

Operating Safety Precautions

Essential safety guidelines and precautions for safe operation of the compressor.

Safety Icons and Symbols Explained

Explanation of visual safety indicators and symbols used on the machine and in the manual.

Noise Emission Control

Prohibitions on Noise Control System Tampering

Legal regulations against modifying or disabling the compressor's noise control system.

Noise Emission Warranty Details

Information regarding the manufacturer's warranty for noise emission compliance.

General Data and Specifications

Compressor Unit Specifications

Technical data, fluid capacities, and measurements for the compressor unit.

Expendable Service Parts List

List of common replacement parts, including their descriptions and part numbers.

Operation Procedures

Pre-Towing and Towing Instructions

Essential checks and steps for safe towing of the compressor unit.

Unit Setup and Disconnection Guide

Procedures for setting up the compressor, towing, and disconnecting it.

Control Panel and Pre-Start Checks

Overview of the control panel functions and critical checks before starting.

Compressor Startup and Shutdown

Detailed steps for starting the compressor, including cold weather starting, and safe shutdown.

Speed and Pressure Regulator Adjustments

Instructions on how to adjust engine speed and discharge pressure regulators for optimal performance.

Maintenance and Servicing

General Maintenance and Scheduled Servicing

Overview of maintenance principles, scheduling, and checking compressor oil levels.

Key Component Maintenance Checks

Routine checks for air cleaner, gauges, fuel tank, and battery systems.

Tires, Fasteners, Radiator, and Hoses Inspection

Inspection of tires, fasteners, hoses, and radiator for wear and proper function.

Compressor Oil Filter Replacement

Procedure for replacing the compressor oil filter element.

Compressor Oil Cooler Cleaning

Procedure for cleaning the compressor oil cooler to maintain efficiency.

Compressor Oil and Receiver-Separator Systems

Guidelines for replacing compressor oil and servicing receiver-separator components.

Scavenge Line, Finish, and Decal Care

Maintenance of scavenge line, exterior finish care, and procedures for replacing canopy decals.

Comprehensive Maintenance Schedule

Detailed schedule for performing maintenance tasks at specified intervals and operating hours.

Lubrication and Fluids

Compressor Fluid Selection Guide

Charts and recommendations for selecting the correct compressor fluid based on pressure and temperature.

Preferred Fluids for Extended Warranty

Information on using preferred fluids to maintain warranty coverage for the airend.

Troubleshooting and Problem Solving

Troubleshooting Methodology and Action Plan

Systematic approach and action plan for diagnosing and resolving compressor issues.

Troubleshooting Unit Startup and Shutdown

Charts identifying causes and solutions for unit startup, running, and shutdown problems.

Troubleshooting Unit Failures and Overheating

Charts for diagnosing unit shutdown failures and high compressor oil temperature issues.

Doosan C185WKU-T2 Specifications

General

Model	C185WKU-T2
Free Air Delivery	185 CFM
Operating Pressure	100 psi
Max Pressure	125 psi
Engine Horsepower	49 HP
Type	Portable Air Compressor
Pressure Range	80 - 125 psi
Noise Level	76 dB(A)