Caterpillar SBS180 334-9937 hydraulic pump for Caterpillar 336E 336F L excavator
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Model Designation: The SBS180 is a dual-variable displacement axial piston pump. It is the high-performance successor to the SBS120, designed to meet the significantly higher flow and pressure demands of the 36-ton machine class.
Volumetric Output: With a displacement of approximately 180 cm³/rev per pump group, it provides the massive hydraulic power necessary for rapid boom lift and high-torque swing operations.
Efficiency: Features an optimized swash plate design that reduces heat generation and internal friction, contributing to the fuel efficiency standards of the Tier 4/Stage IV engines found in E and F series machines.
2. Comprehensive OEM Part Number Compatibility
This pump is a 100% direct-fit replacement for the following Caterpillar factory part numbers:
Primary Numbers: 334-9937, 497-8501, 377-4950, 369-9641. 3349937 4978501 3774950 3699641
Electronic Integration: The pump regulators are factory-calibrated to interface seamlessly with the CAT machine control system (ECM), ensuring smooth load-sensing and flow-sharing capabilities.
3. Specialized Machine Fitment
E-Series Support: Specifically optimized for the CAT 336E, 336E L, and 336E LN.
F-Series Support: Engineered to handle the rigorous duty cycles of the CAT 336F, 336F L, and 336F LN.
Application Versatility: Suitable for high-production environments including heavy construction, bulk earthmoving, and quarry applications.
4. Performance & Durability Features
Operating Pressure: Rated for continuous operation at 350 bar (35 MPa), with heavy-duty construction allowing for pressure spikes up to 380 bar during heavy breakout tasks.
Material Science: Utilizes high-strength alloy cylinder blocks and precision-lapped piston shoes to ensure zero internal leakage and maximum volumetric efficiency.
Robust Bearing Design: Equipped with oversized, low-friction bearings to withstand the high radial and axial loads generated during multi-function hydraulic movements.
5. 13-Year Specialized Service Benefits
Factory Bench Testing: Every SBS180 unit undergoes a rigorous multi-hour bench test to verify flow curves, pressure response, and seal integrity before being crated.
Tiered Quality Solutions: We offer Original New, Premium OEM, and Certified Remanufactured units to match your machine's remaining service life and your maintenance budget.
Professional Logistics: Shipped in reinforced, shock-proof export wooden crates. We offer rapid global delivery via DHL, FedEx, UPS, or TNT (typically 3–7 business days).
6. Critical Installation Protocol (Pro Tips)
Case Priming (Mandatory): You must fill the pump housing with clean hydraulic oil through the topmost case drain port before engine startup. Failure to do so will cause "dry start" damage, leading to immediate pump failure.
System Decontamination: If the old pump suffered a mechanical failure, you must flush the entire hydraulic system (including the tank and oil cooler). Residual metal particles are the #1 cause of premature failure in new pumps.
Filter Service: Always replace the main return filter and the case drain filter when installing a new SBS180 pump to protect its high-precision internal components.