Doosan G30E-5 Service Manual

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SB2349E04

Operation &

Maintenance Manual

FORKLIFTS

D20S-5, D25S-5, D30S-5, D33S-5, D35C-5

G20E-5, G25E-5, G30E-5

GC20E-5, GC25E-5, GC30E-5, GC33E-5

G20P-5, G25P-5, G30P-5, G33P-5, G35C-5

G20P-5 Plus, G25P-5 Plus,

G30P-5 Plus, G33P-5 Plus, G35C-5 Plus

GC20P-5, GC25P-5, GC30P-5, GC33P-5

1105

Original Instruction

Table of Contents

Other manuals for Doosan G30E-5

Service Manual4 pages

Questions and Answers:

J
Jennifer NealAug 4, 2025
How to troubleshoot engine cranking but not starting in Doosan G30E-5 (Gas)?
- M
  Margaret MilesAug 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).
C
Christopher RileyAug 8, 2025
Why is my Doosan G30E-5 difficult to start (Gas)?
- E
  Edward BatesAug 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.
A
Allison EdwardsAug 17, 2025
Why does my Doosan G30E-5 Lifting Systems not accelerate or hesitate during acceleration (Gas)?
- M
  mooresusanAug 17, 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).
A
angelaschmidtAug 21, 2025
How to fix rough idle on Doosan G30E-5 (Gas)?
- A
  angelamendezAug 21, 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).
N
Nicholas GarciaAug 26, 2025
What causes poor high speed performance in Doosan G30E-5 Lifting Systems (Gas)?
- D
  Destiny FosterAug 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.
J
Jack SawyerAug 29, 2025
How to decrease high idle speed on Doosan G30E-5 Lifting Systems (Gas)?
- F
  frank29Aug 30, 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.

Doosan G30E-5 Specifications

General

Model	G30E-5
Load Capacity	3000 kg
Load Center	500 mm
Drive System	2WD
Lift Height	3000 mm
Power Source	Engine
Max Lifting Height	3000 mm

Summary

Information Section

Foreword

Introduction to the manual, its purpose, and storage recommendations.

Safety Section

Essential safety precautions, warning signs, and hazard identification.

Operation

Guidance on operating the lift truck safely and efficiently.

Maintenance Section

Maintenance Intervals

Scheduled service tasks based on operating hours or time intervals.

Fuel Specifications

Requirements for diesel, gasoline, and LP fuels, including bio-diesel concerns.

Lubricant Information

Details on recommended oils, greases, and fluids for various systems.

General Section

Declaration of Conformity

Statement of compliance with relevant EU directives for machinery and EMC.

Specifications

Detailed technical data, dimensions, and performance metrics for lift truck models.

Capacity Chart (Without Sideshifter Pneumatic)

Load capacity tables for various models and masts without sideshifter.

Capacity Chart (With Sideshifter Pneumatic)

Load capacity tables for various models and masts with sideshifter.

Operation Section

Operator’s Station and Monitoring Systems

Overview of the instrument panel, gauges, and warning lights.

Lift Truck Controls

Explanation of directional lever, inching pedal, brake, and accelerator controls.

Before Starting the Engine

Essential walk-around inspection and pre-operation checks.

Starting the Engine

Step-by-step procedures for starting gasoline, LP, and diesel engines.

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