Kubota 185 Hydraulic Pump Parts PSVL-36CG

Kubota 185 Hydraulic Pump Parts PSVL-36CG

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 3 year year

Product details

1. Product Overview

PSVL-36CG Hydraulic Pump Assembly

A variable-displacement axial piston pump designed specifically for theKubota U-185 Mini Excavator, featuring integrated load-sensing (LS) and pressure compensation (PC) functions for efficient hydraulic power delivery in compact construction machinery.

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2. Key Technical Specifications

【表格】

Parameter Details

Model PSVL-36CG

Compatible Models Kubota U-185 (Serial Number Range: KX185-XXXXXX to KX185-YYYYYY)

Displacement 36 mL/rev (±3%)Max Displacement Mode: 38.5 mL/rev

Rated Pressure 24 MPa (3,480 psi) continuous28 MPa (4,060 psi) peak (10-sec duration)

Speed Range 800–2,800 rpm (Optimal Efficiency: 2,200 rpm)

Control Type Dual-Mode: Load-Sensing (LS) + Pressure Compensation (PC)

Rotation Counter-Clockwise (CCW, viewed from shaft end)

Port Specifications - Inlet: SAE #8 O-ring (9/16"-18 UNF)- Outlet: SAE #10 O-ring (3/4"-16 UNF)- Drain: M12×1.5 Straight Thread

Weight 12.8 kg (with control valve block)

Noise Level ≤78 dB(A) (ISO 3744 compliant, measured at 1m distance)

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3. Structural & Material Details

• Pump Body:

• Material: Ductile Iron (QT500-7), coated with Dacromet (≥1,000-hour salt spray resistance).

• Internal Flow Path: Dual-helix groove design, pressure loss ≤0.6 MPa @ 24 MPa output.

• Piston Assembly:

• Piston Diameter: 14 mm (hardened via high-frequency induction, surface hardness HRC 58-62).

• Slipper Material: Copper-based alloy (CuSn10) with self-lubricating coating.

• Control Valve Block:

• Integrated Pressure Compensation Valve (adjustable range: 16–24 MPa) and Load-Sensing Valve (response time ≤50 ms).

• Sealing System:

• Shaft Seal: PTFE lip seal (temperature range: -40℃~+150℃).

• Port Seals: HNBR O-rings (ASTM D2000 compliant).

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4. Performance Features

• Energy Efficiency:

• Volumetric Efficiency ≥91% (at 24 MPa), Mechanical Efficiency ≥88%.

• Standby power consumption reduced by 30% (via LS pressure cutoff).

• Contamination Resistance:

• Built-in 15 μm metal mesh filter, tolerates ISO 18/15 contamination level (NAS 6).

• Compact Design:

• Axial length of 210 mm, optimized for U-185’s narrow engine compartment.

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5. Compatible Hydraulic System

5.1 Fluid Requirements

• Type:

• Recommended: ISO VG32 anti-wear hydraulic oil (Kubota UDT Fluid).

• Alternatives: Mobil DTE 21 Ultra or Shell Tellus S2 M 32.

• Viscosity Range:

• Operating Temperature: -20℃~+80℃ (viscosity 10–300 cSt).

• Filtration Precision:

• Return Filter: ≥10 μm (prevents metal particle damage to pistons).

5.2 Electrical Interface (if applicable)

• Proportional Valve Control:

• Signal Type: 0–5 VDC (linear control).

• Max Current: 200 mA (with built-in overload protection).

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6. Installation & Commissioning Guide

6.1 Installation Steps

1. Alignment:

• Use 6 mm diameter dowel pins to align pump body with engine flange (tolerance ±0.1 mm).

2. Bolt Tightening:

• Cross-tighten bolts in three stages to 55 N·m (verify with torque wrench).

3. Pipe Connection:

• Position inlet port downward (avoid air entrapment), outlet port at 3° upward incline (facilitates air bleeding).

4. Drain Line Setup:

• Independent drain return to tank, backpressure ≤0.5 bar.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

3 year

Address: Ningbo, China

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

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