6E-3136 Caterpillar Hydraulic Piston Pump 250 Bar

Product Overview

The 6E-3136 axial piston variable displacement hydraulic pump (CAT Reman Part Number: 0R-7682 / 0R7682, cross-referenced with 6E3136) is precision-engineered for the primary implement and steering hydraulic systems of Caterpillar 135H, 135H NA, 140H, 140K, 140K 2, 160H, and 160K Motor Graders. Manufactured strictly to Caterpillar OEM engineering standards, this high-performance pump guarantees 100% direct drop-in replacement. Serving as the primary hydraulic power generator for blade lift, tilt, shift, and steering operations, every unit undergoes 100% factory bench testing under simulated full-load and high-pressure conditions to deliver maximum volumetric efficiency, fast dynamic response, and smooth multi-function control.

Technical Specifications

• Part Number: 6E-3136 (Cross-Reference: 6E3136; CAT Reman Part No.: 0R-7682, 0R7682)

• Compatible Equipment: Caterpillar 135H, 135H NA, 140H, 140K, 140K 2, 160H, 160K Motor Graders

• Pump Type: Swashplate Axial Piston Variable Displacement Pump

• Nominal Displacement: Approx. 75 cm³/rev

• Rated Operating Pressure: 24.1 MPa (241 bar / 3500 psi)

• Peak Operating Pressure: 27.5 MPa (275 bar / 4000 psi)

• Maximum Speed: 2200 rpm

• Control Type: Load Sensing with Pressure Cut-Off

• Rotation Direction: Clockwise (CW, viewed from shaft end)

• Net Weight: Approx. 38 kg

Key Technical Advantages

• 100% Direct Drop-in Interchangeability: Precision-machined mounting flanges, drive shaft splines, and hydraulic ports strictly match Caterpillar OEM specifications, ensuring plug-and-play installation without pipeline modification.

• Premium Tribological Components: Features a high-strength forged steel cylinder block paired with precision-lapped bimetallic valve plates, offering high resistance to galling and exceptional volumetric efficiency under continuous high pressure.

• Heavy-Duty Bearing Arrangement: Fitted with high-capacity roller bearing assemblies engineered to absorb severe radial and axial shock loads encountered during aggressive earth grading and bank sloping.

• Low Noise & Rapid Control Response: Optimized timing groove geometry reduces pressure pulsation and operational noise, while the load-sensing compensator delivers immediate fluid delivery for precise blade positioning and steering response.

Application Areas

• Road Construction & Earthmoving Machinery: Primary hydraulic power source for implement functions (blade lift, circle drive, blade tip, wheel lean, and steering) on Caterpillar 140H, 140K, and 160H motor graders.

• Specialized Infrastructure Equipment: Suitable for off-highway road maintenance and snow-clearing machinery using equivalent Caterpillar hydraulic platforms.

Expert Maintenance Tips

• Case Priming Prior to Startup: Fill the pump casing completely with clean hydraulic oil through the highest case drain port before starting the engine for the first time. Operating the pump dry will cause immediate internal seizure.

• System Flushing: Flush the main hydraulic circuit and clean the oil reservoir thoroughly prior to installation, ensuring fluid cleanliness meets ISO 4406 18/16/13 or cleaner.

• Simultaneous Filter Replacement: Always replace all hydraulic suction and return filters simultaneously during pump installation to prevent pre-existing system debris from damaging the new pump unit.