Bulldozers are indispensable heavy machinery in engineering construction, and their chassis system plays a vital role in the working efficiency and stability of bulldozers. As the “skeleton” of the bulldozer, the chassis contains multiple key components that work together to ensure the smooth operation of the bulldozer.
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GFM Bulldozer Undercarriage Supplier
The dozer undercarriage part is an important guarantee of bulldozer performance, and its stability directly affects the working efficiency and safety of the machine. Understanding the composition principle of the undercarriage, timely discovering and solving common faults, and regular maintenance are the key to ensure the long-term stable operation of the bulldozer. If you need to purchase bulldozer undercarriage parts or need more professional advice, please contact us. We provide high-quality bulldozer accessories and provide you with comprehensive technical support.
GFM specializes in providing high-performance bulldozer undercarriage parts for global customers to ensure long-term operation of equipment in harsh environments. Each product undergoes quality assurance inspection and testing to meet and exceed industry benchmarks. Our wide range of chassis parts will definitely get your excavator back on site in a short time.
Track Group
Track Link
Track Shoe
Carrier Roller
Track Roller
Sprocket
Track ldler
Digger Buckets
Bucket Teeth
Hydraulic Cylinder
Pin & Bush
Bolt & Nut

With 14 years of experience, we understand your equipment needs and can help you get the right crawler dozer undercarriage parts for any model and make.
Composition and principle of bulldozer undercarriage
The structure of bulldozer undercarriage is very complex, mainly composed of the following core components:
- Track assembly: The track is one of the most important parts of the bulldozer. It is responsible for dispersing the weight of the machine and improving the traction and stability of the bulldozer.
- Drive wheel and guide wheel: The drive wheel drives the track through the power of the engine, while the guide wheel is used to control the movement direction of the track.
- Sprocket wheel: The contact part between the sprocket wheel and the track plays a role in maintaining the position of the track.
- Support chain plate: The support chain plate ensures the smooth operation of the track and is the support structure of the track.
- Suspension system: The suspension system can reduce chassis vibration and improve the comfort and stability of the machine.
The working principle of the bulldozer undercarriage is based on the interaction between its components. The track slides on the ground through the cooperation of the drive wheel and the sprocket wheel to keep the bulldozer stable and effectively distribute the weight of the machine to ensure that the bulldozer can operate smoothly on different types of ground.






Why do bulldozers need tracks?
Bulldozers use tracks instead of wheels mainly to improve their traction and passability on uneven, muddy, sandy or soft ground. The design of the tracks can disperse the weight of the bulldozer over a large area to prevent the wheels from sinking into soft ground or mud. Therefore, the tracks not only enhance the stability of the bulldozer, but also improve the bulldozer’s ability to operate in complex terrain. Especially in harsh environments such as mountainous areas, deserts or wetlands, the track assembly is the key to the bulldozer’s efficient operation.
Common faults of bulldozer undercarriage
Although the bulldozer undercarriage is designed to be sturdy, due to long-term and high-intensity use, some common faults may still occur in the undercarriage parts, mainly including:
- Excessive wear of the track: The track is one of the most easily worn parts. Long-term use will cause damage to the track surface and even breakage.
- Improper track tension: Too much or too little track tension will affect the operating performance of the bulldozer. Excessive tension will increase the burden on the drive system, while too little tension may cause the track to fall off or slip.
- Damage to the drive wheel or carrier sprocket: Due to the huge mechanical pressure, the drive wheel and carrier sprocket sometimes crack or wear, resulting in unstable track movement.
- Failure of the suspension system: The suspension system of the bulldozer is used to absorb the impact of the ground and prevent the machine from vibrating too much. When the suspension system fails, the bulldozer may experience severe vibration or unstable operation.
If these common faults are not repaired or replaced in time, they may affect the operating efficiency of the bulldozer or even cause greater damage.

Daily maintenance of the bulldozer undercarriage
In order to ensure the long-term stable operation of the bulldozer chassis, the following are some daily maintenance suggestions:
- Check the track regularly: Make sure there are no obvious cracks or damage on the surface of the track. If severe wear is found, it should be replaced in time. Check the track tension regularly to maintain proper tension and avoid being too loose or too tight.
- Lubricate the drive wheel and carrier sprocket: Regularly lubricate the drive wheel, carrier sprocket and other moving parts to reduce friction and extend the service life of the parts.
- Clean undercarriage parts: Especially when working in harsh environments, the bulldozer chassis is prone to accumulate dirt, sand and other debris, which affects the normal operation of the components. Clean the chassis components regularly to prevent debris from damaging the machine.
- Check the suspension system: Check the working condition of the suspension system regularly to ensure its good shock absorption effect. If it is loose or faulty, repair or replace it in time.
- Check the sprockets and chain plates regularly: The sprockets and support chains play a supporting role in the bulldozer chassis. Make sure they are not loose or worn. Check and reinforce these components regularly.
Advantages of GFM undercarriage parts
- High durability: All GFM undercarriage parts are made of top-quality materials and advanced manufacturing processes, ensuring that they have a long service life and low maintenance frequency.
- Precise adaptation: We offer a wide range of chassis component specifications that can accurately match various excavator and mini excavator models to ensure the perfect fit of the product.
- Strong impact resistance: GFM undercarriage parts are designed to cope with extreme working conditions, ensuring that the equipment can still operate stably in harsh environments.
- Customer customization service: We provide customers with customized services and provide tailor-made chassis solutions according to different usage requirements and working environments.
Provide customers with all-round support
GFM not only provides high-quality bulldozer undercarriage, but also provides customers with comprehensive technical support. Our professional team will provide you with accurate installation guidance, maintenance recommendations and regular product inspection services to ensure that your bulldozer is always in the best working condition.

Daily inspection of bulldozer and excavator undercarriage part
Track assembly
- Check the tightness of the track: Tracks that are too tight or too loose will affect the stability and operating efficiency of the equipment. Tracks that are too tight will increase fuel consumption, while tracks that are too loose may cause the track to slip or excessively wear.
- Check the wear of the track: Check whether the track is cracked, broken or excessively worn. Timely replacement of severely worn tracks can avoid further damage to other components.
- Check the track guide wheel: whether the guide wheel is loose or worn. The good condition of the guide wheel can effectively guide the movement of the track and prevent the track from being misaligned.
Drive system
- Check the drive wheel: Excessive wear of the drive wheel may cause poor power transmission of the track and affect operating efficiency. Check whether the drive wheel gear is worn or cracked to ensure its normal operation.
- Check the chain and chain plate: The chain is an important part connecting the drive wheel and the track. Check whether the chain is loose, corroded or worn to ensure the tightness and durability of the chain.
Suspension system
- Check springs and shock absorbers: The suspension system of bulldozers and excavators ensures the stability of the chassis. Check whether the springs are deformed, broken or lose elasticity to avoid the stability of the whole vehicle being reduced due to suspension system failure.
- Check the hydraulic system: whether the hydraulic system is leaking or damaged, and whether the hydraulic oil level is normal. Failure of the hydraulic system will directly affect the movement and operating performance of the chassis.
Cab and chassis connection parts
- Check the connection parts between the chassis and the cab: Check whether the fixing bolts between the chassis and the cab are loose, and whether the connecting parts are cracked. Loose connecting parts may cause chassis instability or excessive vibration of the cab.
Lubrication system
- Check the chassis lubrication: Regularly add lubricating oil to the moving parts of the chassis to ensure that the friction between the moving parts is minimized. Check whether the lubricating oil is in good condition and whether there is any leakage.

Equipment undercarriage maintenance tips
- Avoid excessive load: Overload will cause the chassis to bear excessive pressure and accelerate wear. Ensure that the equipment operates within the designed load range to extend the service life of the chassis.
- Reasonable operation: Operate the equipment smoothly, avoid sudden braking, sudden acceleration and other violent actions, and reduce the impact load on the chassis and other components.
- Regular inspection: In addition to daily inspection and maintenance, comprehensive inspections are carried out at regular intervals, including inspection of chassis components, pressure testing of hydraulic systems, etc., to ensure that the equipment is in good condition.
