Vickers VTM42 Hydraulic Steering Pump | VTM42-15-30 | VTM42-50 VTM42-60

The VTM42 Series vane pumps from Chengyuan Hydraulic are high-reliability power sources specifically designed for mobile vehicle steering systems, fully compatible with Vickers standards. The standout feature of this series is its compact, integrated design, where the pump cover houses both a flow control valve and a safety relief valve. This simplifies hydraulic plumbing while protecting the system from overpressure. For core models like VTM42-15, VTM42-50, and VTM42-60, we utilize reinforced bimetallic side plates and anti-wear vanes. Every unit undergoes 100% simulated steering load testing before shipment to ensure stable flow delivery even at low engine speeds, guaranteeing 100% original-place interchangeability.

Technical Specifications:

• Series Model: VTM42 Series (Balanced Vane Steering Pump)

• Displacement Sizes: e.g., 15cc, 40cc, 60cc /rev

• Controlled Flow Rate: 1.5 – 7.5 US Gpm (Varies by model suffix)

• Max Operating Pressure: 140 bar (2000 psi)

• Relief Valve Setting: 70 bar – 140 bar (e.g., 07 = 700 psi, 10 = 1000 psi)

• Speed Range: 600 – 3600 rpm

• Direction of Rotation: R (Clockwise) / L (Counter-clockwise)

• Inlet Port: Manifold or Hose Connection

• Weight: Approx. 6.8 – 7.5 kg

Key Technical Advantages:

• Integrated Valve Block: The built-in flow control valve ensures a constant flow to the steering gear regardless of engine RPM fluctuations, providing a smooth and precise steering feel. The relief valve offers instantaneous overload protection for the steering linkage.

• Balanced Rotor Design: Utilizing a classic balanced vane structure, radial loads on the stator are neutralized, significantly extending bearing life and reducing heat generation under high-pressure operation.

• Superior Low-Speed Performance: Precision-ground stator profiles combined with spring-assisted vanes ensure the pump develops sufficient steering pressure at idle speeds, eliminating “heavy steering” issues.

• Low Noise Characteristics: Optimized port plate decompression grooves minimize fluid pulsation, reducing noise levels near the operator cabin for improved driving comfort.

Application Areas:

• Heavy Trucks & Buses: Primary power source for steering assistance.

• Agricultural Machinery: Hydraulic steering for tractors and harvesters.

• Construction Vehicles: Forklifts, loaders, and various specialized chassis auxiliary steering.

Expert Maintenance Tips:

• No Dry Starts: Never start the steering pump without prior priming. Since the vanes rely on centrifugal force and oil pressure to seal, dry running will quickly score the stator track.

• Relief Valve Adjustment: The relief valve is factory-set. If field adjustment is required, use a precision pressure gauge. Do not exceed the maximum rated pressure to avoid blowing out steering gear seals.

• System Flushing: Before installing a new pump, thoroughly flush the steering gear and hoses, and replace the steering fluid filter. Residual metallic debris is the leading cause of premature failure in precision vane pumps.