This 3P0891 Transmission Gear Pump (cross-reference OEM 0R7837) is designed to meet stringent Caterpillar specifications for heavy-equipment hydraulics. Manufactured with precision-machined steel gears and hardened alloy housings, it reduces input shaft speed while increasing torque for final drive and steering circuits. Ideal for CAT 12G, 120G, 130G, 140G, and 160G motor graders, as well as wheel loaders equipped with 3304 or 3306 engines, this pump ensures smooth, consistent flow under high loads.
Key benefits include:
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OEM-Quality Construction: Built to original Caterpillar tolerances for fit, form, and function.
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Enhanced Durability: Hardened gear surfaces resist wear and maintain volumetric efficiency over extensive duty cycles.
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Efficient Performance: 2:1 gear ratio ensures optimal torque multiplication with minimal cavitation.
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Comprehensive Warranty: 12-month limited warranty against manufacturing defects under normal use.
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Easy Installation: Straightforward bolt-on replacement with no pressure adjustment required—compatible with standard Caterpillar lubricants and seals.
Technical Specifications:
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Weight: 23.37 kg
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Dimensions: 41 × 26.01 × 32.99 cm
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Gear Ratio: 2:1 (Large gear: 40 teeth; Small gear: 20 teeth)
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Operating Pressure: Up to 3000 psi
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Flow Rate: 45 L/min at 1500 rpm
Installation and Maintenance:
Follow the Caterpillar service manual for torque values, seal inspection, and fluid compatibility. Ensure system flushing before installation to prevent contamination damage.
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