Doosan G25E-5 - Service Manual

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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

Other manuals for Doosan G25E-5

Service Manual4 pages

Questions and Answers

M
Michelle SalasAug 4, 2025
How to troubleshoot engine cranking but not starting in Doosan Lifting Systems (Gas)?
- A
  alexiscoleAug 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).
J
Jessica ChavezAug 8, 2025
Why is my Doosan Lifting Systems difficult to start (Gas)?
- J
  James PachecoAug 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.
J
joshualiuAug 16, 2025
Why does my Doosan Lifting Systems not accelerate or hesitate during acceleration (Gas)?
- N
  nvazquezAug 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).
K
Kim PotterAug 21, 2025
How to fix rough idle on Doosan Lifting Systems (Gas)?
- D
  Duane WestAug 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).
S
Sarah HaasAug 25, 2025
What causes poor high speed performance in Doosan Lifting Systems (Gas)?
- C
  chadwilsonAug 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.
Z
zthompsonAug 30, 2025
How to decrease high idle speed on Doosan Lifting Systems (Gas)?
- L
  leejohnAug 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.
T
tandersonNov 11, 2025
What to do if Doosan Lifting Systems will not run continuously (Gas)?
- P
  Parker GallegosNov 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

Information Section

Foreword

Manual's purpose, storage, and general information about the publication.

Safety

Overview of safety precautions, warning signs, and labels.

Operation

Reference for new and experienced operators on controls, gauges, and procedures.

Safety Section

Important Safety Information

General safety rules, precautions, and hazard identification.

Operating the Lift Truck

Safe operating practices including control, traffic rules, and load handling.

Lift Truck Stability

Explanation of lift truck stability based on center of gravity and load.

Capacity Load (Weight and Load Center)

How to read and understand capacity/nameplates for safe load handling.

General Section

Declaration of Conformity

Statement of conformity with EU directives for machinery, noise, exhaust, and EMC.

Specifications

Detailed technical specifications for various lift truck models.

Operation Section

Operator’s Station and Monitoring Systems

Description of the instrument panel and its indicators for diesel and LPG/GAS engines.

Lift Truck Controls

Identification and operation of major lift truck controls like levers and pedals.

Operating Techniques

Techniques for inching into loads and lifting them safely.

Advanced Diagnostics

Troubleshooting system faults using diagnostic trouble codes and MIL indicators.

Maintenance Section

Inspection, Maintenance and Repair of Lift Truck Forks

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

Maintenance Intervals

Schedule of maintenance tasks based on service hours or time intervals.

Tire Inflation Information

Information on tire inflation, shipping pressure, and adjustment precautions.

Fork Inspection

Routine inspection procedures for forks, including daily and 12-month checks.

Environment Protection Section

Environment Protection

Guidelines for environmentally responsible servicing and cleaning of the lift truck.

Index Section

Index

Alphabetical listing of topics and their corresponding page numbers for quick reference.

Doosan G25E-5 Specifications

General

Load Capacity	2500 kg
Standard Lift Height	3000 mm
Overall Width	1150 mm
Overall Height	2070 mm
Engine Type	Diesel
Power	36 kW
Load Center	500 mm
Engine Power	36 kW
Fuel Type	Diesel
Tyre Type	Pneumatic
Transmission	Automatic
Rated Load	2500 kg

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