08-20-2025, 08:31 PM
General Information
The Komatsu D39PX-22 is a mid-sized crawler dozer designed for durability and efficient operation in demanding environments. The undercarriage plays a critical role in its stability, traction, and longevity, featuring robust components engineered for long service life and reduced maintenance.
Undercarriage Components
The Komatsu D39PX-22 undercarriage exemplifies advanced engineering focused on durability, efficiency, and ease of maintenance. Its wide track shoes, sealed components, and heavy-duty rollers deliver superior ground contact and wear resistance. Combined with Komatsu’s electronic hydraulic and transmission controls, the D39PX-22 offers reliable, stable performance with reduced downtime, optimized for challenging jobsite conditions.
The Komatsu D39PX-22 is a mid-sized crawler dozer designed for durability and efficient operation in demanding environments. The undercarriage plays a critical role in its stability, traction, and longevity, featuring robust components engineered for long service life and reduced maintenance.
Undercarriage Components
- Track Shoes: The D39PX-22 comes with single grouser track shoes measuring 635 mm (25 inches) wide, providing excellent ground contact and flotation in soft or muddy terrain.
- Number of Shoes: Each side has 39 shoes, offering optimal distribution of machine weight.
- Track Rollers: Equipped with 6 heavy-duty, sealed and lubricated track rollers per side, reducing friction and wear.
- Idlers: The dozer features idler cushions designed to absorb shocks, extending undercarriage and track life.
- Sprockets: Solid, bolt-on sprockets with wider teeth improve power transmission and help reduce accelerated wear.
- Track Guards: End-section track roller guards protect rollers from debris and damage.
- Sealed and Lubricated Links: Track links incorporate sealed and lubricated bushing assemblies to minimize corrosion and extend service intervals.
- Large Link and Bushing Diameter: These components contribute significantly to extending the life of the undercarriage by reducing pin and bushing wear.
- Wider Sprocket Teeth: Enhance engagement with the track to reduce slippage and wear.
- Protected Travel Motors and Final Drives: Integrated into the track system to reduce vulnerability to damage during operations.
- Rigid Track Frame: Offers structural strength and stability for precise maneuvering and pushing power.
- The wide track shoes and sealed components offer excellent flotation and reliability, even in challenging, uneven terrain.
- The undercarriage’s robust design results in lower maintenance costs, with Komatsu claiming up to 40% longer wear life compared to previous models.
- Protective features such as sprocket inner guards and crankcase underguards shield critical components from debris and damage.
- The machine uses an electronically controlled Hydrostatic Transmission (HST) with quick-shift and variable speed settings, enabling smooth travel and precise control.
- Palm Command Control System (PCCS) provides proportional hydraulic control, enabling responsive movement of the blade and dozer attachment simultaneous to travel.
- The sealed and lubricated track link assemblies reduce lubrication points, extending service intervals.
- Grease gun holders and easy access points facilitate routine lubrication.
- Track rollers and sprockets are designed for easier replacement, minimizing downtime during undercarriage maintenance.
- The D39PX-22 features an operator-friendly cab or canopy with excellent visibility, comfortable seats, and ergonomic controls.
- Onboard diagnostics and electronic monitor panels assist operators and technicians in monitoring machine health, including undercarriage wear status.
- Single Grouser Shoes: Track shoes with one protruding ridge for traction on hard or mixed terrain.
- Idler Cushions: Shock-absorbing components that protect the track system.
- Sealed and Lubricated Tracks: Track bushes and pins sealed to retain lubrication and exclude dirt.
- Sprocket: A toothed wheel engaging with the track chain to propel the dozer.
- Hydrostatic Transmission (HST): Electrically controlled hydraulic transmission providing smooth speed and direction changes.
The Komatsu D39PX-22 undercarriage exemplifies advanced engineering focused on durability, efficiency, and ease of maintenance. Its wide track shoes, sealed components, and heavy-duty rollers deliver superior ground contact and wear resistance. Combined with Komatsu’s electronic hydraulic and transmission controls, the D39PX-22 offers reliable, stable performance with reduced downtime, optimized for challenging jobsite conditions.
