A11VO for mining dump truck

The A11VO is a high-pressure, high-flow open-circuit piston pump designed by Rexroth for mining dump trucks (20–400-ton class). It is specifically engineered for heavy-duty lifting and dual steering/braking systems, features a through-shaft series configuration, offers high shock resistance, and ensures a long service life. It serves as the standard main pump for mainstream models.

First, Models and Displacement (Mainstream Mining Trucks)

1. A11VO: Basic self-priming type (small to medium tonnage / dual-pump)

2. A11VLO: Built-in makeup pump (large tonnage / high-speed cavitation resistance)

3. Common specifications (cm³/r):

130/145: 20–60 tons (lifting / steering)

190: 80–180 tons (main lifting)

260: 200–400 tons (extra-large mining trucks)

Second, Core Parameters (Heavy-Duty Mining Truck Version)

1. Rated pressure: 350 bar; Peak: 400 bar (lifting peak 380 bar)

2. Maximum speed:

130/145: 2500 rpm

190/260: 2300 rpm (typically 1800–2200 rpm for mining trucks)

3. Control Mode (Standard for Mining Trucks): LRDS (Load Sensing LS + Constant Power LR + Pressure Cut-off DR)

4. Drive: 100% through-shaft; can be configured in series with a pilot pump + gear pump (steering/braking/cooling)

5. Compensating Flow (A11VLO): Built-in centrifugal pump, stable suction at -0.8 bar, cavitation prevention

Third, Exclusive Advantages for Mining Trucks

1. High-Pressure Shock Resistance: 350 bar continuous high pressure, suitable for lifting heavy loads exceeding 300 tons

2. High Flow Rate and Efficiency: 260 cm³/r × 2000 rpm ≈ 520 L/min, fast lifting and high efficiency

3. Energy and Fuel Efficiency: LS+LR composite control reduces fuel consumption by 20–35% compared to older models, lowering operating costs

4. High Reliability and Long Service Life:

High-precision friction pairs with wear-resistant coatings, dust and contamination protection

Cavitation resistance (A11VLO): Adapted to high temperatures, dust, and oil contamination in mining environments

Design life: 20,000+ hours, extended overhaul intervals

Integrated Common Shaft: Multiple pumps in series simplify the drive train, reduce costs, and minimize failures

Fifth, Common Faults and Maintenance Points

1. Common Issues:

Slow lifting: Insufficient LS signal pressure or improper power valve adjustment

Engine stalling: Constant power valve overload or mismatched engine power

Abnormal noise/cavitation: Clogged suction filter or worn make-up pump (A11VLO)

2. Maintenance:

Hydraulic oil: 46# anti-wear hydraulic oil (use 32# for low temperatures), change every 2,000 hours

Filters: Suction/return filters, change every 500 hours

Pressure calibration: Cut-off pressure 370–390 bar, power matching at 90–95% load

Elephant Fluid Power Technical team has many years of operation and service experience, Provide customers with professional hydraulic system solutions, Quality assurance of quality products, if you need A11VO for mining dump truck, We will provide you with the highest quality service.

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