271-2116 Caterpillar D6T Piston Pump 189L/min 217bar

Product Overview

Technical Specifications

• Model: 271-2116 (Cross-reference: 4588651 / 3417664 / 148-3051)
• Configuration: Variable-displacement axial piston swashplate pump (open circuit)
• Hydraulic System Type: Load-sensing variable displacement (Load-Sensing)
• Rated Working Pressure (Non-VPAT): 217 bar (3147 psi)
• Rated Working Pressure (VPAT): 244 bar (3545 psi)
• Maximum Flow (Implement Pump): 189 L/min (49.9 gpm)
• Rated Speed (Implement Pump): 1965 rpm
• Maximum Displacement (Derived): Approx. 96 cm³/rev
• Control Method: Load-sensing + Pressure compensator
• Weight: Approx. 30 kg (66 lbs)
• Rotation: Clockwise viewed from shaft end (standard configuration)
• Compatible Machines: Caterpillar D6T XL / D6T XW / D6T LGP
• Companion Engine: Cat C9 ACERT (Net power 138-153 kW / 185-200 hp)

• Implement Pump Flow: 189 L/min (49.9 gpm) @ 1965 rpm
• Steering Pump Flow: 179 L/min (47.3 gpm) @ 2625 rpm
• Implement Relief Valve Setting (Non-VPAT): 217 bar (3147 psi)
• Implement Relief Valve Setting (VPAT): 244 bar (3545 psi)
• Steering System Relief Valve Setting: 417 bar (6048 psi)
• Hydraulic Tank Capacity: 51.5 L (13.6 gal)
• Total Hydraulic System Capacity: Approx. 62.5 L (16.5 gal)

• D6T XL: Approx. 21,703 kg (47,846 lbs)
• D6T XW: Approx. 22,588 kg (49,797 lbs)
• D6T LGP: Approx. 24,417 kg (53,829 lbs)
• D6T XL VPAT: Approx. 24,060 kg (53,042 lbs)

Key Technical Advantages

Precision Machining & Manufacturing

Load-Sensing Energy Efficiency

Low Noise & Vibration Design

Long-Life Bearing & Seal System

Dual-Pump Independent Circuit Compatibility

Application Areas

• General Dozing & Site Grading: D6T XL configuration for standard construction site dozing, backfilling, and grading — the 271-2116 pump delivers 189 L/min stable flow to the blade lift/tilt cylinders at 217 bar working pressure, ensuring sufficient blade penetration force
• Low Ground Pressure Wetland Operations: D6T LGP configuration for swamp, wetland, and soft ground conditions — LGP machines at 24,417 kg operating weight achieve ground pressure as low as 5.11 psi; the 271-2116 pump provides precise angle and tilt control for VPAT blades at 244 bar
• Pipeline Construction & Trenching: D6T XW extra-wide track configuration for long-distance pipeline laying and trenching — the extra-wide undercarriage provides superior lateral stability while the 271-2116 pump drives ripper cylinders and blade for precise depth control
• Forestry Dozing & Land Clearing: Compatible with D6T forestry arrangement, providing hydraulic power for dozing and winch operations — high pressure settings ensure powerful pushing force and winch line pull in dense vegetation conditions
• Mining Support Operations: Used in small-to-medium mining operations for road maintenance, spoil pile dozing, and face cleanup — the 271-2116 pump maintains stable flow output under heavy-duty continuous operating conditions
• Landfill Waste Operations: Compatible with D6T waste arrangement, providing hydraulic power for blade and compaction operations — seal system is reinforced for high-contamination environments

Expert Maintenance Tips

• Installation Alignment: Ensure pump shaft alignment with the engine gearbox drive output within 0.05mm radial offset and 1° angular deviation. The D6T’s piston pump is directly driven by the engine gearbox — inspect the drive gear spline condition before installation. Pre-fill the pump housing with clean hydraulic fluid before startup — dry starting will cause irreversible damage to the piston-cylinder assembly and valve plate within seconds.
• Hydraulic Fluid Requirements: Use Caterpillar DEO™ or equivalent ISO VG 32-68 anti-wear hydraulic fluid. Fluid cleanliness must meet ISO 4406 18/16/13 minimum. Maintain fluid temperature between 30-80°C; during cold starts, fluid temperature must not be below 10°C — perform low-speed warm-up if necessary. Hydraulic tank capacity is 51.5 L (13.6 gal); always maintain fluid level within the dipstick range.
• Case Drain Line: The case drain port must be plumbed directly back to the reservoir with a maximum backpressure of 1.0 bar (15 psi). The drain line size must be equal to or larger than the pump case drain port, and no throttling devices or shutoff valves may be installed in the drain line. Regularly monitor case drain volume — a significant increase indicates accelerated wear of the piston-cylinder assembly or valve plate, necessitating teardown inspection.
• Load-Sensing System Commissioning: After pump replacement, the load-sensing system must be pressure-matched. Verify the load-sensing signal line (LS Line) is correctly connected and leak-free, and that the implement relief valve setting matches factory specifications (217 bar / 3147 psi for Non-VPAT; 244 bar / 3545 psi for VPAT). After system startup, observe the pump standby pressure reading in no-load condition — the normal value should be approximately 20-30 bar below the relief valve setting.
• Preventive Maintenance Schedule: Inspect shaft seal condition and case leakage volume every 2,000 operating hours. Replace hydraulic fluid and suction strainer element every 5,000 hours or annually, whichever occurs first. Sample hydraulic fluid every 1,000 hours to test cleanliness and moisture content, replacing fluid that fails to meet specifications. Total hydraulic system capacity is approximately 62.5 L; during fluid changes, always replace filters and clean the tank simultaneously.