FAW Jiefang Truck Steering System Maintenance and Repair Guide

As the core supplier of FAW Jiefang trucks, we are always committed to providing customers with high-quality parts and professional technical support. Steering system as a key component of truck safe driving, its maintenance and repair directly affects the vehicle’s maneuverability, stability and service life. In this article, we will provide your customers with comprehensive guidance suggestions from four aspects: the basic structure of the steering system, daily maintenance, maintenance precautions and the list of commonly used parts.

Steering System Overview

FAW Jiefang trucks mainly use hydraulic power steering system (HPS) and electronic power steering system (EPS), which are different in structure and working principle, but the core objective is to reduce the driver’s steering burden and improve handling accuracy.

Hydraulic Power Steering System (HPS)
– Components: Steering pump, hydraulic oil pot, oil pipe, steering gear, belt, etc.
– Working Principle: The engine drives the steering pump to generate hydraulic pressure, which is transferred to the steering gear through the oil pipe to assist the driver to complete the steering operation.
– Characteristics: Stable power output, but dependent on engine power, requires regular maintenance of hydraulic oil and belt.
Electronic power steering system (EPS)
-Components: motor, controller, sensor, steering column, etc..
– Working Principle: Provide steering assistance directly through the motor, low energy consumption and fast response speed.
– Characteristics: compact structure, low maintenance requirements, but need to pay attention to dustproof and waterproof.

Steering System Routine Maintenance Considerations

Regular maintenance is the key to avoid steering system failure. The following are general and specialized maintenance points for hydraulic and electronic power assist systems:

General maintenance items

Fluid inspection and replacement
– Hydraulic system:
– Regularly check the hydraulic fluid level to ensure that it is located in the middle of the oil pot scale; replace the hydraulic fluid every 30,000 to 60,000 kilometers or as required by the manual.
– When replacing the hydraulic oil, you need to use the original factory-specified type of hydraulic oil, and different brands should not be mixed, so as to avoid deterioration of the oil leading to wear of the pump body.
– Electronic system:
– Although no hydraulic oil is required, it is necessary to check the heat dissipation of the motor controller periodically to prevent overheating damage.
Belt and transmission parts inspection
– The steering pump belt of the hydraulic system needs to be checked regularly for tightness (pressing down 1cm is good) and replaced every 60,000 to 100,000 kilometers to prevent breakage leading to booster failure.
Piping and sealing inspection
– Check the oil pipes and joints for oil leakage or aging to avoid hydraulic oil leakage or air entering the system to trigger rattling or heavy steering.
– The dust cover of the electronic system needs to be inspected regularly and replaced in time when broken to prevent dust or moisture from intruding inside the motor.

Specialized Maintenance Recommendations

Hydraulic power system:
– Avoid beating the steering wheel to death for a long time, and keep a margin when steering in place to prevent overloading the hydraulic pump.
– Clean the hydraulic oil filter element every quarter to prevent impurities from clogging the pipeline.
Electronic power system:
– Maintain normal tire pressure. Low tire pressure will increase the motor load and shorten its life.
– Regularly check the steering cross tie rod ball head and dust cover to ensure good lubrication.

Steering System Maintenance Precautions

Maintenance operations need to follow safety specifications to ensure the safety of personnel and equipment, while extending the service life of accessories.

Safe operation norms

Preparation before maintenance
– Park the vehicle on a flat surface, tighten the handbrake and turn off the engine, and disconnect the power supply to prevent false starting.
– The hydraulic system needs to be relieved of pressure before disassembling the oil pipe to avoid injury from high pressure oil spraying.
Principle of spare parts replacement
– Use original parts to ensure compatibility and durability. For example, hydraulic oil seals should be strictly matched to prevent leakage.
– Key parts (e.g. steering gear worm gear) are not recommended to be processed or welded by yourself, and need to be replaced as a whole.

Common Troubleshooting

Heavy steering
– Possible causes: insufficient hydraulic fluid, loose belt, worn pump body or air intake in the system.
– Solution: replenish hydraulic oil, adjust the belt, replace the steering pump or empty the system air.
Steering noise
– Possible causes: belt aging, insufficient steering column lubrication or broken dust cover.
– Solution: Replace the belt, add grease or replace the dust cover.
Hydraulic oil leakage
– Possible causes: aging of the oil pipe, loose fittings or oil seal failure.
– Solution: Replace the oil pipe, tighten the joint or install a new oil seal.

Commonly used steering system parts list

For the convenience of customers’ purchasing, the following are the commonly used original parts and their replacement suggestions in the steering system maintenance of FAW Jiefang trucks:

Accessory Name	Function Description	Replacement intervals/recommendations
Hydraulic Steering Pump	Provides hydraulic boost pressure	Replace when rattling or insufficient pressure occurs
Steering fluid	Lubricates and transfers pressure	Replace every 30,000-60,000 kilometers
Steering Belt	Drive the hydraulic pump	Replace every 60,000 – 100,000 km inspection
High Pressure Hose	Delivering hydraulic fluid	Replace when deterioration or leakage is detected
Steering Gear Assembly	Core steering actuators	Replace when severely worn or stuck
Dust Cover (EPS)	Protects the motor and controller	Replace immediately after breakage
Cross Rod Ball Head	Connecting the steering mechanism to the wheels	Check lubrication every 20,000 kilometers and replace when loose

Technical Support and Service Commitment

As an authorized supplier of FAW Jiefang trucks, we promise:
1. Original quality guarantee: all parts pass strict quality inspection to ensure perfect match with the original vehicle.
2. Professional guidance: Provide maintenance manuals, repair videos and 24-hour technical advice.
3. Fast supply: supported by global warehousing network, urgent orders are shipped within 48 hours.

Regular maintenance and proper repair are the core of safeguarding the reliability of FAW Jiefang truck steering systems. By using genuine parts and following this guide, your customers can significantly reduce the failure rate and extend the service life of their vehicles. For a complete maintenance manual or parts catalog, please contact our service team.