The 56B-33-11121 Piston is a precision-engineered hydraulic cylinder component specifically designed for Komatsu HM350 and HM400 articulated dump trucks. Manufactured from premium-quality materials and built to OEM specifications, it delivers reliable sealing performance, efficient hydraulic force transmission, and exceptional durability under continuous heavy-load operation. Its robust construction helps reduce hydraulic leakage, improve system efficiency, and extend the service life of hydraulic cylinders in demanding mining, quarry, and construction environments.
Provides reliable combustion support and stable engine performance under heavy-duty conditions
Surface Treatment / Protection
Precision machined surfaces with wear-resistant treatment
Dimensions & Structure
OEM standard configuration
Function / Installation Position
Engine cylinder piston position
Operating Conditions
Heavy-duty diesel engine operation
Compatible Models
HM400, HM350
System
Engine combustion system
Weight
16.9 kg
Packaging
Industrial carton + foam protection
Lead Time
30–90 days
Shipping Method
Sea / Air / Land
Payment Method
USD / RMB / RUB
Warranty
6 months
Features & Benefits
Precision-engineered piston designed for Komatsu HM350 and HM400 articulated dump trucks
Manufactured from premium high-strength alloy steel for outstanding durability and wear resistance
Precision-machined to OEM specifications for accurate fit and dependable hydraulic performance
Provides excellent sealing performance for efficient hydraulic cylinder operation
Engineered to withstand high hydraulic pressure, impact loads, and demanding working conditions
Minimizes internal leakage and helps extend the service life of hydraulic components
Direct replacement for the original Komatsu piston with quick and easy installation
Backed by a 6-month warranty
Compatible Machine
Part Number: 56B-33-11121
This piston is compatible with:
Komatsu HM350 Articulated Dump Truck
Komatsu HM400 Articulated Dump Truck
It is commonly used in the hydraulic cylinder system of these articulated dump trucks.
If you’re unsure whether 56B-33-11121 Piston is compatible with your machine, simply provide your machine serial number (PIN) or parts catalog number, and our technical team will verify compatibility before shipment.
Applications
The 56B-33-11121 Piston is an essential hydraulic cylinder component designed to provide reliable force transmission and smooth hydraulic operation in heavy-duty applications. It is widely used in:
Mining operations
Quarry operations
Heavy material hauling
Earthmoving projects
Infrastructure construction
Road construction
Continuous heavy-load transportation
Its rugged construction helps improve hydraulic system efficiency, reduce maintenance requirements, and ensure dependable performance in demanding environments.
Why Choose YLCM?
YLCM specializes in supplying genuine, OEM, and premium aftermarket replacement parts for Komatsu, Caterpillar, Cummins, Hitachi, Volvo, and other leading construction and mining machinery brands.
We provide:
Genuine, OEM, and high-quality aftermarket Komatsu parts
Competitive factory-direct pricing
Strict quality inspection before shipment
Fast worldwide delivery
Professional export packaging
Technical support before and after sales
Extensive international export experience
One-stop sourcing for engine, hydraulic, transmission, electrical, and undercarriage components
In addition to hydraulic pistons, we also supply hydraulic cylinders, seal kits, hydraulic pumps, control valves, engine components, drivetrain parts, filters, and a complete range of Komatsu replacement parts.
Packaging & Shipping
Every 56B-33-11121 Piston is professionally packaged to ensure safe international transportation.
Packaging options include:
Export-standard carton packaging
Reinforced wooden crate (available upon request)
Moisture-proof and anti-corrosion protection
Sea freight
Air freight
Express courier services
Multimodal logistics solutions
Each shipment is securely packed to minimize transportation risks and ensure the product arrives in excellent condition.
Request a Quote
Looking for the 56B-33-11121 Piston for Komatsu HM350 / HM400?
Contact YLCM today to receive:
Latest quotation
Stock availability
Delivery lead time
Packing details
Shipping solutions
OEM part verification
Professional technical support
Our experienced sales team will respond promptly with competitive pricing and professional service tailored to your articulated dump truck maintenance and hydraulic repair needs.
