Dong Feng ZB25 - User Manual

Questions and Answers

C
Cristina MitchellAug 22, 2025
What to do if my Dong Feng Tractor has oil pressure problems?
- F
  flowersveronicaAug 22, 2025
  If your Dong Feng Tractor is experiencing oil pressure problems, start by checking the oil level and refilling it as needed. Also, check whether the oil intake is broken, as the oil pump might be sucking air. Other potential causes include a malfunctioning oil filter (replace it), a faulty oil filter pressure regulator valve spring (replace it), a worn-out oil pump (replace it or reduce its paper gasket), or excessive bearing clearance (check and replace bearings as necessary).
B
Benjamin McconnellAug 26, 2025
Why is my Dong Feng Tractor engine low on power?
- A
  Amanda RoblesAug 26, 2025
  A Dong Feng Tractor engine might be low on power for a few reasons. Check if the third ring is fitted upside down and refit it correctly, ensuring the mark '(up)' faces upward. Worn piston rings and valve guides can also reduce power; replace them. Finally, too much oil in the crankcase can hinder performance, so drain the oil to the correct level.
C
Charles OsborneAug 28, 2025
How to fix clutch slip in my Dong Feng ZB25 Tractor?
- H
  holly04Aug 28, 2025
  If your Dong Feng Tractor's clutch is slipping, several factors could be responsible. Begin by checking the friction disc for oil stains; if present, wash the disc with petrol and repair the oil leak. A weakened or broken pressure plate spring can also cause slippage; replace it with a new one. Limited or no clutch pedal free travel is another possibility; readjust the pedal free travel as specified. Furthermore, a warped, unevenly worn, or worn-out clutch plate could be the culprit; rectify or replace it. Lastly, misaligned release levers can cause clutch slip, so adjust and align the lever ends in the same plane.
S
scottmariaAug 31, 2025
Why does my Dong Feng ZB25 have insufficient lifting capacity?
- L
  Lisa GarciaAug 31, 2025
  Insufficient lifting capacity in your Dong Feng Tractor could be due to several reasons. It may be caused by insufficient engine power output, so inspect and service/repair the engine. Also, check if the oil level in the transmission case is too low and replenish oil. Make sure that the weight in the bucket does not exceed the maximum specified loader capacity and reduce material load if needed. Other potential causes include lifting cylinder piston assembly leakage (check cylinders for leakage and repair as needed), a control valve leaking internally (replace the control valve and recheck operation), or a defective hydraulic pump (check and repair or replace).
J
James BatesSep 3, 2025
What to do if the brake disengages incompletely on my Dong Feng ZB25 Tractor?
- T
  Thomas YangSep 4, 2025
  If the brake on your Dong Feng Tractor disengages incompletely, it could be due to a few reasons. A weakened brake shoe return spring can cause this issue; replace it with a new spring. Also, check if the brake pedals are unable to return, this may be caused by a damaged pedal return spring or a seized operating shaft, and fix as required. Limited or no pedal free travel can also prevent full disengagement; readjust the pedal free travel.
K
Kimberly DavisSep 9, 2025
Why is there an abnormal sound in the gearbox of my Dong Feng Tractor?
- J
  Joshua SuttonSep 9, 2025
  An abnormal sound in your Dong Feng Tractor's gearbox could indicate several issues. Excessively worn or damaged gearbox bearings or needle rollers might be the cause; check and replace them with new ones. Abnormal meshing of the main drive gears can also produce unusual sounds; examine the gear meshing zone print and backlash, and adjust them as per specifications. Lastly, worn-out spline shafts and sliding gears can cause noise; replace them with new parts.
S
Scott ArmstrongSep 10, 2025
Why is my Dong Feng ZB25 exhaust smoking?
- L
  Logan LambertSep 12, 2025
  Exhaust smoking in your Dong Feng Tractor can stem from several causes. A slow or partially blocked injector nozzle can cause this problem; consider replacing or servicing it. Overloading the engine is another potential cause, so adjust the gearing accordingly. Incorrect fuel injection timing can also lead to exhaust smoke, so make sure to adjust it. Other causes include poor valve sealing or incorrect timing (check and adjust), uneven fuel delivery from the injector pump or injectors (check and service), a blocked air filter (clean or replace), or worn cylinder liners and piston rings (replace them).
D
Dr. Daniel SchultzSep 12, 2025
What causes an overheating gearbox in a Dong Feng Tractor?
- S
  Sabrina MartinSep 13, 2025
  An overheating gearbox in your Dong Feng Tractor can be caused by several factors: * Too much or too little backlash - adjust as required. * Insufficient or excessive lubrication oil - add or drain the transmission oil to the specified level. * Old or contaminated oil - change the oil and filter.
K
kimberlyrodriguezNov 15, 2025
How to start a Dong Feng ZB25 when the diesel engine fails to start?
- E
  Eric JonesNov 15, 2025
  If your Dong Feng Tractor's diesel engine won't start, several issues could be the cause. First, check if there's fuel in the tank and add fuel if needed. Air in the fuel system can also prevent starting, so bleed the air and identify the cause. A blocked fuel system is another possibility; replace the fuel filter and inspect the fuel delivery line. Other potential causes include worn-out injector pump components (replace them), blocked or poorly atomizing injectors (replace or service them), incorrect valve clearance (adjust to specifications), a valve leak (replace or grind the valve), a blown head gasket (replace and tighten the cylinder head), piston ring bypass (replace, clean, or reassemble the rings), incorrect injector pump or valve timing (readjust), low ambient temperature (use g...

Summary

Tractor Specifications

Front End Loader Specifications

Safety Precautions

Safe Tractor Operation

Fuel and Fire Safety

Stay Clear of Rotating Drivelines

Tow Loads Safely

Safety First

General Safety Precautions

Starting the Tractor

Tractor Operation

Provides guidelines for safe and stable tractor operation in various conditions.

Using Agricultural Implements and Machinery

Stopping the Tractor

Front End Loader Safety

Safety Rules and Precautions

General safety rules for loader operation and installation.

Prior To Each Use

When Operating

Provides operational guidance for loader use, including stability and load handling.

Performing Maintenance

Instrument Panel And Controls

Controls

Running-in

Operating Instructions

Starting and Stopping

Driving

Instructions for safely starting and operating the tractor while driving.

Starting to Drive

Stopping Driving

Control and Usage of Tractor’s Working Devices

Details on operating the tractor's implements and hydraulic systems.

Hydraulic Lift System

Operating the PTO

Mechanical Adjustment

Single Clutch - ZB25

Two Stage Clutch - ZB35; ZB45

Front Wheel - 4 WD

Front Drive Axle

Power Steering

Covers the working principle, structure, and maintenance of the power steering system.

Brakes

Discusses brake lining wear, adjustment for sync, and potential issues.

Shoe Brake

Disc Brake

Electrical System

Final Drive System

Technical Maintenance

Oil and Lubrication

Details lubrication points, oil types, and inspection points for the tractor.

Lubrication Points

Grease Nipples

Oil Level Inspection Points

Oil Drain Plugs On

Maintenance Schedule

Provides a comprehensive schedule for routine tractor maintenance tasks.

Daily Checks

30 Hour 1 st Service

Details the tasks required for the initial 30-hour service.

50 Hourly Service

Outlines the maintenance tasks for 50-hour service intervals.

100 Hourly Service

Specifies the maintenance tasks for 100-hour service intervals.

250 Hourly Service

Lists the maintenance tasks required for 250-hour service intervals.

500 Hourly Service

Details the maintenance tasks for 500-hour service intervals.

1000 Hourly Service

Outlines the maintenance tasks for 1000-hour service intervals.

Maintenance Service

Explains the importance of scheduled maintenance and warranty requirements.

Maintenance Check List

A checklist for tracking maintenance tasks performed at various intervals.

Recommended Oil

Maintenance

Fuel

Covers fuel checking, refuelling, bleeding the system, and fuel line maintenance.

Checking and Refuelling

Replacing the Spin on Fuel Filter

Engine Oil

Covers checking oil levels, replacement, and oil change procedures.

Oil Level Check and Replacement

Engine Oil Change

Transmission Oil

Details on checking and changing transmission oil.

Transmission Oil Change

Replacing Hydraulic Oil Filter

Changing Front Axle Case Oil

Grease Before Operation

Radiator

Covers radiator maintenance, cleaning, and coolant checks.

Checking, Maintaining and Changing the Cooling Water

Check and Clean the Radiator and Screen

Tyre Pressure

Air Cleaner

Battery

Three Point Linkage Adjustment

Trouble-Shooting Guide

Engine

Troubleshooting for engine starting, oil pressure, and other issues.

Diesel Engine Fails to Start

Identifies possible causes and solutions for engine starting failures.

Oil Pressure Problems

Troubleshooting for low or no oil pressure issues.

Exhaust Smoking

Diagnoses causes of black, white, and blue smoke from the exhaust.

Engine Low on Power

Troubleshooting for issues causing the engine to lose power.

Serious Vibration

Troubleshooting for excessive vibration, often due to assembly issues.

Engine Overheating

Diagnoses causes and solutions for engine overheating.

Engine Using Too Much Oil

Troubleshooting for excessive engine oil consumption.

Engine Oil Level Rising

Addresses causes for the engine oil level increasing unexpectedly.

Runaway Engine

Troubleshooting for engine running uncontrollably.

Engine Hunting

Diagnoses causes of engine speed fluctuations (hunting).

Engine Stalls

Troubleshooting for issues causing the engine to stall.

Chassis

Troubleshooting for chassis-related issues like clutch and brake problems.

Clutch

Troubleshooting for clutch slip and engagement issues.

Clutch Slip

Clutch Disengaged Incompletely

Vibration and Noise in Clutch

Brake

Troubleshooting for ineffective braking and brake bias.

Ineffective Braking

Brake Bias

Gearbox

Troubleshooting for abnormal gearbox sounds and gears jumping out.

Abnormal Sound in Gearbox

Gears Jumping Out

Overheating Gearbox

Wheel and Steering System

Troubleshooting for front-wheel wobble and premature tyre wear.

Front-Wheel Wobble

Premature Front Tyre Wear

Full Hydraulic Steering Gears

Troubleshooting for heavy steering, oil leakage, and steering failure.

Heavy Steering

Oil Leakage

Steering Failure

Hydraulic System

Troubleshooting for issues with the three-point linkage and implement lowering.

Three Point Linkage Not Lifting

Diagnoses why the three-point linkage fails to lift.

Implement Not Lowering

Troubleshooting for when implements fail to lower.

Electrical System

Troubleshooting for battery and alternator issues.

Battery

Addresses insufficient battery power, overheat, and capacity issues.

Battery Overheat

Troubleshooting for battery overheating problems.

Battery Capacity Evidently Decreased

Diagnoses reasons for a significant decrease in battery capacity.

Alternator

Troubleshooting for alternator faults like not working or fluctuating output.

Alternator Not Working

Diagnoses causes for the alternator failing to function.

Low Current Output Form the Alternator

Troubleshooting for reduced current output from the alternator.

Alternator Output Current Fluctuating

Diagnoses causes for unstable or fluctuating alternator output.

Abnormal Sound from Alternator

Troubleshooting for unusual noises originating from the alternator.

Starter

Troubleshooting for starter motor not working or running continuously.

Starter Motor Not Working

Diagnoses reasons why the starter motor is not engaging.

Starter Running Continuously After Engine Being Started

Troubleshooting for the starter motor continuing to run after engine start.

Loader Operation

Tractor Preparation

Prepares the tractor and loader for attachment and operation.

Attachment; Compatibility

Tractor Hydraulic System

Loader Attachment and Removal

Provides step-by-step instructions for attaching and removing the loader.

Attaching the Loader

Detailed procedure for securely attaching the loader to the tractor.

Removal of Loader

Step-by-step instructions for safely removing the loader assembly.

Installation of Bucket

Removal of Bucket

Operating the Loader

Guidance on safe and efficient operation of the loader.

Transporting a Loader Bucket

Loader Hydraulic Controls

Loader Maintenance

Maintenance

General safety precautions and overview of loader maintenance requirements.

Lubrication and Maintenance Chart

A chart detailing lubrication and maintenance tasks and their intervals.

General Torque Specification

Loader Trouble Shooting

Lifting and Bucket Cylinders Not Working

Troubleshooting for issues where lifting or bucket cylinders are unresponsive.

Insufficient Lifting Capacity

Diagnoses causes for reduced lifting capacity of the loader.

Slow or Uneven Lift

Troubleshooting for slow or uneven lifting performance of the loader.

Lifting and;or Bucket Cylinders Operate in Wrong Direction

Addresses incorrect cylinder operation relative to control lever position.

Loader Drops with Control Valve Spool in Centred Position

Troubleshooting for loader dropping when control valve is centered.

Control Valve Spools Will Not Return to Centred Position

Diagnoses causes for control valve spools failing to return to neutral.

Bucket Cutting Edge Wear is Uneven Side to Side

Troubleshooting for uneven wear on the bucket cutting edge.

Abnormal Sound

Addresses causes of abnormal sounds from the loader's operation.

Excessive Foam in Oil Tank

Troubleshooting for excessive foam formation in the hydraulic oil tank.

Abnormal Noise of the Oil Pump

Acting Speed of the Bucket is Slow and Insufficient

Troubleshooting for slow and insufficient bucket movement speed.

Oil Leakage

Identifies common causes and solutions for oil leakage in the loader system.

Loader Parts

Bucket Assembly

Tool Carrier Assembly

Arm Assembly

Mounting Kit Assembly

Hydraulic System Assembly

Dong Feng ZB25 Specifications

General

Engine Power	25 hp
Tire Size (Front)	6.00-16
Overall Length	3100 mm
PTO Type	Independent
Steering Type	Mechanical
Number of Gears	2 reverse
Brake Type	Mechanical

Related product manuals

Dong Feng ZB25 - User Manual

Table of Contents

Questions and Answers

Summary

Tractor Specifications

Front End Loader Specifications

Safety Precautions

Safe Tractor Operation

Fuel and Fire Safety

Stay Clear of Rotating Drivelines

Tow Loads Safely

Safety First

General Safety Precautions

Starting the Tractor

Tractor Operation

Using Agricultural Implements and Machinery

Stopping the Tractor

Front End Loader Safety

Safety Rules and Precautions

Prior To Each Use

When Operating

Performing Maintenance

Instrument Panel And Controls

Controls

Running-in

Operating Instructions

Starting and Stopping

Driving

Starting to Drive

Stopping Driving

Control and Usage of Tractor’s Working Devices

Hydraulic Lift System

Operating the PTO

Mechanical Adjustment

Single Clutch - ZB25

Two Stage Clutch - ZB35; ZB45

Front Wheel - 4 WD

Front Drive Axle

Power Steering

Brakes

Shoe Brake

Disc Brake

Electrical System

Final Drive System

Technical Maintenance

Oil and Lubrication

Lubrication Points

Grease Nipples

Oil Level Inspection Points

Oil Drain Plugs On

Maintenance Schedule

Daily Checks

30 Hour 1 st Service

50 Hourly Service

100 Hourly Service

250 Hourly Service

500 Hourly Service

1000 Hourly Service

Maintenance Service

Maintenance Check List

Recommended Oil

Maintenance

Fuel

Checking and Refuelling

Replacing the Spin on Fuel Filter

Engine Oil

Oil Level Check and Replacement

Engine Oil Change

Transmission Oil

Transmission Oil Change

Replacing Hydraulic Oil Filter

Changing Front Axle Case Oil

Grease Before Operation

Radiator

Checking, Maintaining and Changing the Cooling Water

Check and Clean the Radiator and Screen

Tyre Pressure

Air Cleaner

Battery

Three Point Linkage Adjustment