PGP640A0500CD1H3NT4T2B1B1 Parker Gear Pump 50cc 310bar

Product Overview

The PGP640A0500CD1H3NT4T2B1B1 belongs to the Parker PGP640 Series of two-piece interlocking cast iron, fixed-displacement external gear pumps. The model code breaks down as follows: PGP640 denotes the 640 series housing (displacement range 40–80 cc/rev); A0500 indicates the displacement specification (50.0 cm³/rev); CD1H3NT4T2B1B1 specifies the mounting configuration, shaft type, porting, seal material, and rotation direction. This product corresponds to Parker manufacturer part number 7049111052.

The Parker PGP640 Series delivers exceptional performance and reliability under heavy-duty hydraulic applications in construction, agriculture, and material handling equipment. As a direct OEM alternative to Parker PGP640 Series pumps, this product is manufactured to strict Parker original specifications, featuring 100% form-fit-function interchangeability – mounting dimensions, port configurations, and shaft styles are fully identical to original Parker PGP640 series pumps, requiring zero modifications for direct replacement. Every pump undergoes 100% simulated duty-cycle testing prior to shipment, with performance validation conducted at rated pressure, flow, and actual load conditions.

The PGP640 Series features a unique two-piece interlocking cast iron housing design that delivers high efficiency, high pressure, and exceptional power density. The series offers comprehensive integrated valve options – including pressure relief, anti-cavitation, cross-port relief, solenoid unloading, and proportional relief valves – to meet the integration needs of complex hydraulic systems. The PGP620 Series shares the same two-piece cast iron construction philosophy.

Technical Specifications

PGP640A0500CD1H3NT4T2B1B1 (Specific Model)

• Model Number: PGP640A0500CD1H3NT4T2B1B1

• Series: PGP640

• Parker Part Number: 7049111052

• Geometric Displacement: 50.0 cm³/rev

• Rated Pressure (Continuous): 310 bar (4496 psi)

• Maximum Operating Pressure: 275–310 bar (3989–4496 psi)

• Maximum Speed: 3000 RPM

• Minimum Speed: 500 RPM

• Maximum Flow Rate: 240 L/min (63 gal/min)

• Construction: 2-piece interlocking cast iron housing, external gear, journal bushings

• Rotation: Bi-rotational (CW/CCW optional)

• Mounting: SAE B/C 2-bolt or 4-bolt flange

• Shaft Type: SAE Splined (B, BB, C)

• Port Connections: SAE Split Flange / ISO / NPT / BSPP / ODT

• Port Locations: Side ports or rear ports

• Body Material: Cast Iron

• Fluid Compatibility: Standard hydraulic fluids, fire-resistant fluids, water-glycol, biodegradable fluids

• Operating Temperature Range: -20°C to +80°C

• Viscosity Range: 50 – 7500 SUS

• Recommended Filtration: ISO 4406 Class 19/17/13

• Weight: 22.70 kg

• Country of Origin: Czech Republic

PGP640 Series (Full Displacement Range)

• Displacement Range: 40 – 80 cm³/rev (2.44 – 4.88 in³/rev)

• Standard Displacements: 40 / 45 / 50 / 55 / 60 / 65 / 70 / 75 / 80 cc/rev

• Rated Pressure (Continuous): 310 bar (4496 psi)

• Maximum Speed: 3000 RPM

• Minimum Speed: 500 RPM

• Maximum Flow Rate: 240 L/min (63 gal/min)

• Weight: Approx. 22.7–25 kg

• Configuration: Single / Tandem / Multiple available

PGP620B0230AD1H3VE6E5C-511 (PGP620 Series)

• Model Number: PGP620B0230AD1H3VE6E5C-511

• Series: PGP620

• Geometric Displacement: 23.0 cm³/rev

• Rated Pressure (Continuous): 275 bar (3989 psi)

• Maximum Speed: 3500 RPM

• Construction: 2-piece interlocking cast iron housing

• Maximum Displacement: 50 cm³/rev

• Weight Range: 10–15 kg

Key Technical Advantages

1. Two-Piece Interlocking Cast Iron Housing – The Foundation for High Pressure & Efficiency

The PGP640 Series features an innovative two-piece interlocking cast iron housing design that delivers exceptional structural rigidity and resistance to deformation through the interlocking connection between the flange and housing. This design enables the pump to withstand continuous operating pressures up to 310 bar while maintaining noise levels far below conventional designs. Cast iron’s superior damping characteristics effectively absorb hydraulic pulsations, significantly reducing operating noise. The PGP620 Series shares the same two-piece cast iron construction philosophy.

2. Pressure-Balanced Thrust Plates – The Guarantee of Volumetric Efficiency

The pressure-balanced thrust plate design creates a precision oil film support at the gear end faces, automatically compensating for axial clearance. This design maintains minimal end-face leakage across the full pressure range, ensuring high volumetric efficiency. Per Parker service manual specifications, the maximum allowable wear on balance plates is 0.002″ – exceeding this limit will result in increased internal leakage.

3. Journal Bushings – Long-Life, Low-Friction Bearing System

The PGP640 Series employs journal bushing design, providing durable support and lubrication for the gear shafts. Continuous oil film lubrication between the bushings and shafts prevents metal-to-metal contact, significantly extending bearing and gear service life. Case-hardened gears provide excellent wear resistance.

4. Flexible Multi-Section Pump Configurations – The Optimal Solution for System Integration

The PGP640 Series supports single and multiple pump configurations in series or parallel. Multi-section configurations allow a single power input to drive multiple independent hydraulic circuits, dramatically reducing installation space, lowering system costs, and simplifying plumbing layouts.

5. Comprehensive Integrated Valve Options – The System Simplifier

The PGP640 Series offers a wide range of integrated functional valve options, including: pressure relief valves, anti-cavitation valves, cross-port relief valves, solenoid unloading valves, and proportional relief valves. This integration reduces external plumbing and fittings, eliminates potential leak points, and lowers assembly costs.

Application Areas

• Construction Equipment: Wheel loaders, excavators, skid-steer loaders, telehandlers

• Agricultural Machinery: Tractor hydraulics, combine harvesters, sprayers, seeders

• Material Handling Equipment: Forklifts, reach stackers, conveyor systems

• Forestry Equipment: Feller bunchers, skidders

• Turf Equipment: Zero-turn mowers, turf maintenance equipment

• Fan Drive Systems: Engine cooling fan drives

• Steering & Brake Systems: Hydraulic power steering, brake pumps

• Winch Systems: Winch drive pumps

• Mining & Oil & Gas: Mining auxiliary equipment, oil & gas drilling

• Military Equipment: Tactical vehicles and engineering equipment

Expert Maintenance Tips

1. Fluid Cleanliness Control – The #1 Factor for Service Life

PGP640/PGP620 Series gear pumps are highly sensitive to fluid cleanliness. Parker recommends system filtration to ISO 4406 Class 19/17/13 or better. Contaminants accelerate wear on thrust plates and journal bushings. Per Parker service manual, pitted balance plates indicate cavitation or fluid aeration; discolored balance plates indicate overheating, typically due to insufficient oil supply.

2. Pre-Installation Cleaning & Inspection

Thoroughly clean all piping and fittings prior to installation to ensure no metal chips, sand particles, weld slag, or other contaminants remain. Inspect the pump shaft and coupling condition – per Parker specifications, any wear detectable by touch in the seal area requires shaft replacement, with maximum allowable wear of 0.002″.

3. Coupling Alignment & Installation

Gear pumps must not be subjected to radial or axial external loads – all external loads must be absorbed by the coupling. Ensure coaxial alignment between the pump shaft and drive shaft meets SAE standard requirements. Improper alignment is the leading cause of shaft seal leakage and premature bearing failure.

4. Suction Line Design

The PGP640 Series has a minimum operating speed of 500 RPM, while the PGP620 Series has a minimum speed of 600 RPM – both require adequate suction line diameter to ensure sufficient oil supply. Suction lines should be as short and straight as possible, avoiding sharp bends and restrictions. Suction inlet absolute pressure should be maintained between 0.8 and 2 bar.

5. First Start-Up & Air Bleeding

After installation, bleed air from the system through a loosened outlet fitting. Run the pump at low speed under no load in a jogging mode until all air is confirmed to be purged from the system. Gradually apply load to reach rated operating conditions. If abnormal thrust plate wear is observed within a short period, immediately check for shock pressures or improperly set relief valves.

6. Use Genuine Parker Replacement Parts Only

The Parker service manual explicitly requires the use of genuine Parker replacement parts for all repairs. Non-genuine parts cannot guarantee dimensional tolerances and material properties, potentially leading to pump damage or safety hazards.