Hydraulic Pump 247-8924 164-4402 9T-7099 0R-7950 for Cat D6R D6H D6T

D6R Hydraulic Pump 247-8924 164-4402 for Cat Dozer Product Overview This heavy-duty 247-8924 and 164-4402 implement hydraulic pump assembly is a premium aftermarket replacement spare part built specifically for tracked conventional dozers. It delivers the precise fluid volume and stable hydraulic force required to operate the blade lift, tilt, and rear ripper configurations. Utilizing optimized swashplate linkages, it maintains proper control sensitivity and eliminates severe flow cavitation during demanding industrial site leveling and heavy rock ripping maneuvers. Core Technical Performance & Load Bearing Advantages Engineered to handle high cyclic working pressures, this variable displacement axial piston pump uses highly refined tribological metallurgy to deliver solid functional benefits: Volumetric Fluid Stability: Premium internal piston clearance profiles restrict internal high-pressure bypass loops, sustaining optimum mechanical output even under extreme heat. Cavitation Suppression: Internally cast flow ports are hydrodynamically sculpted to ensure smooth fluid induction, mitigating micro-pitting under high temperature environments. Robust Drive Spline: Hardened input shafts easily accept engine flywheel power distribution without fatigue deformation or structural splined tooth shear failure. Compatible Machine & Serial Number Matrix This primary hydraulic unit fits perfectly into the specified high-horsepower earthmoving dozer machinery lines detailed below: Equipment Type Compatible Machine Models Applicable Serial Number Ranges Track-Type Tractors D6R Bulldozer D6R-DMP, D6R-FBJ, D6R-2HM Reference Mining Crawler Dozers D6R II / D6R III Dozer D6R-BRJ, D6R-EXL, D6R-GPE Series OEM Matching Cross Reference & Pairing Parts List Ensure correct system component protection and interface sealing during high-pressure pump rebuild procedures: Component Description OEM Part Number Interchange / Pairing Reference Hydraulic Variable Piston Pump 247-8924 2478924 Main Pump Element Hydraulic Variable Piston Pump 164-4402 1644402 Alternate Configuration Pump Shaft Lip Seal 141-5128 1415128 High-Pressure Shaft Seal Flange O-Ring Seal 4J-0522 4J0522 Fluorocarbon D-Ring Common Axle Hub Failure & Component Replacement Guidance While encountering deep trenching or soil grading resistances in open-pit mining heavy loads or cold morning cycles in -40°C extreme arctic cold, hydraulic piston assemblies encounter specific wear strains: Slipper Face Scuffing: Contaminated fluids or fine silt particulates scratch the clearance surfaces between the pistons and the swashplate, triggering heavy case drain flows and losing blade lift speed. Shaft Seal Fracture: High pressure back-up inside the pump housing, often resulting from clogged oil filters or restricted case lines, will compromise the front seal and leak oil outward. Installation Caution: Thoroughly clean out the complete hydraulic circuit and purge old fluids from system heat exchangers before bolting down the new 247-8924 housing. Pre-fill the pump body with clean hydraulic oil through the top suction port to eliminate initial dry-start friction damage. Manufacturing & Precision QC Standard Every aftermarket replacement spare part complies with standardized powertrain engineering controls to sustain flawless operation under extreme conditions: Piston Bored Match: Internal barrel blocks and matching pistons are machine-lapped to micron boundaries to form tight oil barriers that minimize internal heat degradation. Dynamic Hydro-Testing: Complete assemblies undergo high-pressure benchmarking to confirm precise flow-vs-stroke parameters and verify housing casting integrity. Swashplate Flatness: Surface profiles receive specialized fine-finishing steps to establish total face alignment, reducing mechanical operating sound and extending component lifespan. Frequently Asked Questions Q: Are the 247-8924 and 164-4402 hydraulic pump part numbers directly interchangeable? A: Yes. The 247-8924 acts as the updated replacement part number for the older 164-4402 design, matching the factory mounting flanges, drive splines, and hydraulic hose connections. Q: What are the main signs that indicate a bulldozer hydraulic pump is failing? A: Notable reduction in multi-function blade response speed under working load, high case heat levels, erratic steering shuddering, and loud whining noises coming from the pump body during actuation. Q: Can this pump assembly maintain constant efficiency in high-ambient desert dust operations? A: Yes. This pump is manufactured with resilient internal seals and tight tolerance boundaries that maintain proper oil viscosity and prevent internal pressure bleed-off in high thermal environments. Related Axle & Drivetrain Spare Parts 170-8452 Hydraulic Steering Control Valve Segment 255-1243 High Pressure Main Blade Cylinder Seal Kit 141-5128 High-Pressure Drive Shaft Lip Seal 4J-0522 Fluorocarbon Mounting Flange O-Ring Related Part Numbers NO P.N. 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