Hydraulic Main Pump 311‑9541 26478174 for Caterpillar

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Product details

Hydraulic Main Pump 311‑9541, 26478174 for Caterpillar E330C Excavator

Product Overview

This hydraulic main pump 311‑9541, 26478174 is a core replacement hydraulic piston pump for Caterpillar E330C excavator. It supplies high‑pressure hydraulic oil for the whole hydraulic system, delivering power for digging, traveling, swinging and other actions of the Machine. Damaged main pump may lead to insufficient digging strength, slow operation, high oil temperature, abnormal noise and machine power loss. This replacement pump keeps the original installation structure, ideal for equipment overhaul and on‑site maintenance.

Technical Specifications

- Part Number: 311‑9541, 26478174

- Applicable Machine: Caterpillar E330C Excavator

- Product Type: Hydraulic Main Pump, hydraulic piston pump

- Working Medium: Anti‑wear hydraulic oil

- Working Pressure: Matches OEM standard

- Installation: Direct replacement, no structural modification

- Includes: Pump body, internal piston assembly, valve plate, drive shaft

- Application: Excavator power source for full hydraulic system

Working Principle

As the key power component of the hydraulic system, this hydraulic piston pump converts mechanical power from the engine into hydraulic energy. Through variable displacement adjustment, it outputs matched flow and pressure according to real‑time working load of the Machine. Internal piston groups reciprocate to generate high‑pressure oil, distributing hydraulic power to each executive component to realize all movement functions of the excavator.

Core Advantages

1. Strict production processing standards, consistent with original mounting dimensions for direct installation.

2. Precision‑matched internal friction pairs, low noise, stable pressure output during continuous heavy‑load operation.

3. Good anti‑wear performance, effectively reducing internal leakage inside the hydraulic pump.

4. Effectively solves typical failures: weak digging force, slow action, high hydraulic oil temperature, abnormal pump noise.

5. Excellent compatibility with the original hydraulic system, convenient disassembly and assembly for field Machine repair.

Application Scope

Specially designed for Caterpillar E330C crawler excavator. Widely used in mining site, earth‑moving project, infrastructure construction and other heavy‑duty working scenarios. It is an indispensable power spare part to restore normal working performance of construction Machine.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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