hydraulic pump repair kit

hydraulic pump repair kit

3 day ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 3 year year

Product details

PMP Hydraulic Pump Repair Kit Components

Based on comprehensive technical documentation and supplier specifications, the standard configuration of a PMP hydraulic pump repair kit is categorized by functional modules as follows:

I. Sealing System

1. O-ring Seals

• Material: Fluorocarbon rubber (Viton®, temp range -40°C to 200°C) or Nitrile Butadiene Rubber (NBR)

• Applications: Plunger rods, pump housing joints, oil distribution plate grooves

• Specifications: AS568 standards, inner diameter × cross-sectional diameter (e.g., 3.5×1.8mm)

2. Composite Oil Seals

• Structure: Galvanized steel skeleton with Polytetrafluoroethylene (PTFE) carbon-filled lip

• Function: Prevents high-pressure zone leakage, dynamic sealing up to 35MPa

3. Rectangular Seals

• Specialized design: For plunger-cylinder block reciprocating motion, dual-lip stepped configuration

II. Dynamic Components

1. Plunger Assembly

• Material: Alloy steel (chrome-plated or ceramic-coated surface, Vickers hardness ≥HV1000)

• Precision: Cylindricity tolerance ≤0.002mm, clearance with cylinder block controlled at 0.01-0.03mm

2. Cylinder Block & Port Plate

• Cylinder block: Ductile iron (EN-GJS-400-15 standard), honed inner bore (Ra≤0.4μm)

• Port plate: High-carbon steel with bronze-alloyed flow channels, surface hardened (HRC58-62)

3. Return Mechanism

• Spring set: INCONEL X-750 superalloy, fatigue life exceeding 10 million cycles

• Damping design: Integrated hydraulic buffer for plunger reversal impact elimination

III. Bearing & Lubrication System

1. Main Bearings

• Type: Double-row angular contact ball bearings (e.g., SKF 7212 BECBP) or hydrostatic plain bearings

• Lubrication: Pre-filled with extended-life grease (NLGI grade 2, ISO VG220 base oil)

2. Lubrication Accessories

• Oil gallery distributors: 316 stainless steel, laser-drilled micro-orifices (±0.01mm precision)

• Grease gun couplings: DIN 3405 compliant, integrated check valves

IV. Control Valves

1. Pressure Regulators

• Relief valve: Direct-acting poppet design, adjustable range 200-350bar, with damping orifices

• Charge pump valve: Proportional solenoid-actuated, response frequency ≥100Hz

2. Safety Devices

• Rupture discs: Burst pressure at 1.25× system max pressure, nickel-chromium alloy foil

V. Fasteners & Hardware

1. High-Strength Bolts

• Material: 8.8-grade alloy steel (10.9-grade for critical applications)

• Coating: Dacromet-treated, 720-hour salt spray resistance (no red rust)

2. Specialized Tools

• Plunger extractor: Hydraulic-driven, max pull force 15 tons

• Torque wrenches: Preset torque ±3% accuracy, traceable calibration certificates

VI. Documentation & Accessories

1. Installation Manual

• Includes 3D exploded views, torque tables, alignment deviation specs (coaxiality ≤0.05mm)

2. Condition Monitoring Tags

• Embedded RFID chips, recording maintenance dates, part replacement codes, etc.

Application & Customization

• Typical Use Cases: Concrete mixer trucks (e.g., PMH P110 models), marine steering hydraulic systems

• Custom Options: Upgradeable ceramic plungers (3× lifespan), integrated oil temperature sensor ports

• Certifications: ISO 14001 environmental management, ATEX explosion-proof compliance (select models)

This configuration applies to axial piston variable displacement pumps. Match repair kit part numbers with specific pump models (e.g., PV090/PV110) using pump nameplate or equipment manuals to ensure compatibility.

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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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