VOE11804378 Volvo Hydraulic Piston Pump A10VO45

Product Overview

This is a direct OEM-interchange hydraulic axial piston pump under Volvo part numbers VOE11804378 / 11804378, cross-compatible with the Rexroth A10VO45 variable-displacement design. Engineered for Volvo A35F, A35G, A40F, A40G articulated haulers, L180 wheel loaders and EC45/ECR48C compact excavators. Features a swash-plate variable axial-piston construction supporting load-sensing and pressure-compensator control, with flow proportional to drive speed and swash-plate angle. Manufactured to exact OEM dimensions and interfaces for 100% drop-in interchangeability. Every unit undergoes 100% simulated operating-condition testing to verify pressure, flow and sealing integrity under demanding construction-equipment duty cycles.

Technical Specifications 

• Part Numbers: VOE11804378 / 11804378 (compatible with Rexroth A10VO45)
• Pump Type: Variable displacement axial piston pump (open circuit)
• Geometric displacement: approx. 45 cm³/rev (A10VO45 size)
• Nominal pressure: approx. 280 bar
• Peak pressure: up to approx. 350 bar
• Machine system working pressure: max. 25 MPa (250 bar, A35F/A40F series)
• Control method: Pressure compensator / load-sensing (depending on configuration)
• Maximum speed: approx. 2600–3000 r/min (version-dependent)
• Weight: approx. 35 kg (reference aftermarket data)
• Compatible Models: Volvo A35F, A35G, A40F, A40G, L180, EC45, ECR48C, etc.

(Data cross-verified from Volvo machine hydraulic system specifications and official Rexroth A10VO series technical documentation. Exact pump-body details should be confirmed against the original service manual.)

Key Technical Advantages

• Precision swash-plate and piston-shoe design: High-wear-resistant materials and tight-tolerance machining deliver high volumetric efficiency and low internal leakage even under continuous high-pressure operation.
• Load-sensing variable control: Automatically adjusts displacement to actual demand, reducing energy consumption and relief losses while improving overall machine fuel efficiency.
• Excellent suction characteristics and low noise: Optimized flow paths and housing design minimize cavitation and operating noise, extending bearing and seal life.
• 100% drop-in interchangeability and simulated testing: Mounting flange, shaft end and ports match OEM exactly; full duty-cycle validation before shipment ensures sealing integrity and minimizes downtime.

Application Areas

Hoist and steering hydraulic systems on Volvo articulated haulers (A35F/A40F series); L180 wheel loaders; main hydraulic circuits of EC45/ECR48C compact excavators; mining, quarry and earthmoving applications requiring reliable high-pressure hydraulic power.

Expert Maintenance Tips

Clean ports and drive shaft thoroughly before installation. Use recommended hydraulic oil and verify system cleanliness. Pre-fill the case with oil before start-up. After replacement, run at low speed under no load, then gradually increase load while checking for abnormal noise or leakage. Regularly monitor return filters and oil temperature; avoid prolonged over-pressure or cavitation. Perform pump flow and compensator valve pressure tests/adjustments according to the official Volvo service manual.