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Doosan G30P-5 Plus - User Manual

Doosan G30P-5 Plus
264 pages
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SB2349E10
FORKLIFTS
D20S-5, D25S-5, D30S-5, D33S-5, D35C-5
FDA04, FDA05, FDA06, FDA07, FDA08 (Yanmar 3.3L/3.0L Tier-3)
G20E-5, G25E-5, G30E-5
FGA07, FGA08, FGA09 (HMC 2.4L Tier-3)
GC20E-5, GC25E-5, GC30E-5, GC33E-5
FGA0K, FGA0L, FGA0M, FGA0N (HMC 2.4L Tier-3)
G20P-5, G25P-5, G30P-5, G33P-5, G35C-5
FGA0A, FGA0B, FGA0C, FGA0D, FGA0E (MMC 2.4L Tier-3)
G20P-5 Plus, G25P-5 Plus,
G30P-5 Plus, G33P-5 Plus, G35C-5 Plus
FGB0H, FGB0J, FGB0K, FGB0L, FGB0M (GM 3.0L Tier-3)
GC20P-5, GC25P-5, GC30P-5, GC33P-5
FGA0P, FGA0R, FGA0S, FGA0T (MMC 2.4L Tier-3)
1703
Operation &
Maintenance Manual
Original Instruction

Table of Contents

Questions and Answers

  • M
    Melissa GarciaAug 4, 2025
    How to troubleshoot engine cranking but not starting in Doosan G30P-5 Plus (Gas)?
    • J
      John DeleonAug 4, 2025
      If your Doosan Lifting Systems engine cranks but won't start, several issues could be the cause. First, ensure the fuel tank isn't empty and is at least ¼ full. Other potential causes include a clogged fuel filter (repair or replace as needed), a faulty vapor connection (check for holes, loose clamps, or kinks), an electric fuel pump malfunction (check electrical connections, relay, and fuse), a malfunctioning fuel pressure regulator (test its operation), a malfunctioning fuel injector (test its operation), incorrect air/fuel or ignition/spark control (see Advanced Diagnostics), or no VR Sensor signal (verify the VR signal is present).
  • M
    Melanie WyattAug 7, 2025
    Why is my Doosan Lifting Systems difficult to start (Gas)?
    • T
      teresajohnsonAug 8, 2025
      If your Doosan Lifting Systems experiences difficulty starting, it might be due to several reasons. Check if the fuel tank is almost empty, as this can cause fuel pump cavitations; ensure the tank is at least ¼ full. Other potential causes include a clogged fuel filter (repair or replace), an electric fuel pump malfunction (check connections, relay, and fuse, and verify the pump is operating), a malfunctioning pressure regulator (test its operation), a malfunctioning fuel injector (test its operation), or a clogged air filter (clean or replace as required). Also, incorrect air/fuel or ignition control could be the issue (see Advanced Diagnostics). For engine mechanical issues, consult the Engine Service Manual.
  • R
    Richard Gregory MDAug 16, 2025
    Why does my Doosan G30P-5 Plus not accelerate or hesitate during acceleration (Gas)?
    • D
      Diamond HendrixAug 16, 2025
      If your Doosan Lifting Systems will not accelerate, hesitates during acceleration, or the engine stalls, first isolate the gasoline system by running the lift truck on LPG. Verify the LPG cylinder is full and the valve is open. If the problem does not exist in LPG mode, proceed with the corrective action steps below; if the problem also exists in LPG mode, the root cause is most likely something other than the fuel system. Other potential causes include a fuel tank that's nearly empty (ensure it's at least ¼ full), a clogged fuel filter (repair or replace), a pressure regulator malfunction (test its operation), or a fuel injector malfunction (test its operation).
  • T
    Taylor BenderAug 20, 2025
    How to fix rough idle on Doosan Lifting Systems (Gas)?
    • S
      Sue HarrisAug 20, 2025
      If your Doosan Lifting Systems has a rough idle, isolate the gasoline system by running the lift truck on LPG. Verify the LPG cylinder is full and the valve is open. If the problem does not exist in LPG mode, proceed with the corrective action steps below; if the problem also exists in LPG mode, the root cause is most likely something other than the fuel system. Other potential causes include a pressure regulator malfunction (test its operation), a clogged fuel filter (repair or replace), or a vacuum leak (check between mixer and throttle body, throttle body and intake manifold, and intake manifold and cylinder head).
  • D
    david23Aug 26, 2025
    What causes poor high speed performance in Doosan G30P-5 Plus Lifting Systems (Gas)?
    • K
      kathleen25Aug 26, 2025
      To address poor high-speed performance in your Doosan Lifting Systems, start by isolating the gasoline system by running the lift truck on LPG. Verify the LPG cylinder is full and the valve is open. If the problem does not exist in LPG mode, proceed with the corrective action steps below; if the problem also exists in LPG mode, the root cause is most likely something other than the fuel system. Also check for a clogged fuel filter (repair or replace), a plugged fuel line (remove obstruction), a clogged air filter (clean or replace), a faulty vapor connection (check for holes, tight clamps, and kinks), a pressure regulator malfunction (test its operation). For incorrect ignition control, see Advanced Diagnostics & Engine Service Manual.
  • K
    Kayla RyanAug 29, 2025
    How to decrease high idle speed on Doosan Lifting Systems (Gas)?
    • M
      michellebutlerAug 29, 2025
      To troubleshoot high idle speed in your Doosan Lifting Systems, check the pedal return spring travel for binding. For incorrect idle speed control, see Advanced Diagnostics & Engine Service Manual.
  • C
    Carol LeeNov 11, 2025
    What to do if Doosan G30P-5 Plus will not run continuously (Gas)?
    • C
      Courtney AlvaradoNov 11, 2025
      If your Doosan Lifting Systems will not run continuously, begin by isolating the gasoline system by running the lift truck on LPG. Verify the LPG cylinder is full and the valve is open. If the problem does not exist in LPG mode, proceed with the corrective action steps below; if the problem also exists in LPG mode, the root cause is most likely something other than the fuel system. Other potential causes include a nearly empty fuel tank (ensure it's at least ¼ full), a clogged fuel filter (repair or replace), an electric fuel pump malfunction (check connections, relay, and fuse), a pressure regulator malfunction (test its operation), or a fuel injector malfunction (test its operation). For incorrect idle speed or ignition problems, see Advanced Diagnostics. For engine mechanical issues, co...

Summary

FORKLIFTS

Model Identification

Lists various forklift models covered by the manual.

Information Section

Foreword

Introduces the manual's purpose, structure, and important notes.

Safety Section

Important Safety Information

Crucial safety precautions and hazard awareness for operation and maintenance.

General Warning to Operator

Lists critical operational warnings and safety rules for operators.

Parking brake

Explains the operation and importance of the parking brake.

Operation Information

Details procedures for mounting, dismounting, and pre-operation checks.

Starting the Lift truck

Step-by-step instructions for starting the engine.

Operating the Lift Truck

General guidelines for safe and efficient lift truck operation.

Lift Truck Parking

Steps for safely parking the lift truck.

Fire or Explosion Prevention

Measures to prevent fires and explosions from fuel, oil, and batteries.

Avoiding Lift Truck Tipover

Explains factors affecting stability and how to prevent tipovers.

General Section

Specifications

Detailed technical specifications for various models.

Declaration of Conformity

Statement of compliance with EU directives.

Noise and Vibration

Noise and vibration level specifications.

Capacity Chart (Without Sideshifter Pneumatic)

Load capacity charts for specific models without sideshifter.

Capacity Chart (With Sideshifter Pneumatic)

Load capacity charts for specific models with sideshifter.

Serial Number

Locations for identifying various serial numbers.

Operators Warning and Identification Plate

Explains identification plates and mast abbreviations.

Operation Section

Operator’s Station and Monitoring Systems

Overview of the instrument panel and its indicators.

Getting started

Procedures for powering on, off, and adjusting volume.

Setting the sound

Controls for bass, treble, balance, and EQ settings.

Playing a USB device

Steps for connecting and playing music from a USB device.

Lift Truck Controls

Overview of primary lift truck operating controls.

Refueling

Procedures for refueling gasoline or diesel engines.

Changing LP Tanks

Procedure for safely changing LP fuel tanks.

Before Starting the Engine

Comprehensive walk-around inspection checklist.

Starting the Engine

Procedures for starting gasoline and diesel engines.

Dual Fuel System

Procedures for switching between gasoline and LP fuel.

Lift Truck Operation

How to operate the lift truck using the power shift transmission.

Basic Troubleshooting(LP)

Common LP engine starting and running issues and solutions.

Advanced Diagnostics

Introduction to the diagnostic system and MIL operation.

Displaying Fault Codes (DFC) from SECM Memory

Procedure to access diagnostic trouble codes.

Maintenance Section

Inspection, Maintenance and Repair of Lift Truck Forks

Guidelines for inspecting, maintaining, and repairing lift truck forks.

Causes of Fork Failure

Common reasons for fork failure such as overloading and wear.

Fork Inspection

Procedures for daily and annual fork inspections.

Tire Inflation Information

Guidelines for proper tire inflation and shipping pressures.

Torque Specifications

Torque values for various fasteners and hose clamps.

Cooling System Specifications

Information on coolant type and concentration.

Fuel Specifications

Details on diesel fuel and additional technical requirements.

Lubricant Information

Specifications for engine oil, hydraulic oil, and drive axle oil.

Lubricant Viscosities and Refill Capacities

Tables for oil viscosity based on temperature and refill capacities.

Maintenance Intervals

Schedule and procedures for regular maintenance tasks.

Engine Oil & Filter (Diesel Engine Only) - Change

Step-by-step guide for changing engine oil and filter for diesel engines.

Transmission Oil, Oil Filter & Strainer - Check, Clean, Change

Procedures for transmission oil, filter, and strainer maintenance.

Forks - Inspect

Detailed inspection guidelines for lift truck forks.

Environment Protection Section

Environment Protection

Guidelines for environmentally responsible servicing and cleaning.

Index Section

Index

Alphabetical listing of topics and their page numbers.

Doosan G30P-5 Plus Specifications

General IconGeneral
ModelG30P-5 Plus
Load Capacity3000 kg
Power TypeLPG
Rated Capacity3000 kg
Load Center Distance500 mm
Power SourceLPG
Wheel TypePneumatic

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