7029122005 Parker PGP620 Hydraulic Gear Pump 3000psi

Product Overview

The 7029122005, 7029521045, 7029122021, and 7029120053 are OEM part numbers for the Parker Hannifin PGP620 Series cast iron fixed displacement external gear pumps. These pumps are original equipment for JCB and other construction machinery manufacturers, widely used in JCB 3CX, 4CX backhoe loaders, and Terex excavating loaders.

The PGP620 Series is part of Parker‘s 600 Series gear pump product line, featuring two-piece interlocking cast iron construction with low-friction journal bearings, delivering high efficiency, high power density, and exceptional durability. The series offers displacements from 19 to 50 cm³/rev with maximum pressures up to 275 bar (4,000 psi). PGP620 pumps are available in clockwise (CW), counterclockwise (CCW), and bi-rotational configurations, with SAE standard flanges, shafts, and porting options.

As original specification OEM models within the Parker PGP620 line, these products enable direct form-fit-function interchangeability with original Parker units—no modifications to piping or mounting interfaces required. Our replacement solutions strictly adhere to Parker technical standards and undergo 100% simulated in-service testing to ensure performance, reliability, and service life identical to OEM products.

Technical Specifications

Applicable Models (Primary):

• 7029122005

• 7029521045

• 7029122021

• 7029120053

PGP620 Series Technical Specifications (per Parker official documentation):

• Product Series: Parker PGP620 Cast Iron Gear Pump

• Product Type: Fixed Displacement External Gear Pump

• Housing Material: Two-Piece Interlocking High-Strength Cast Iron

• Bearing Type: Low-Friction Journal Bushings

• Sealing: Pressure Balanced Thrust Plates

• Displacement Range: 19 – 50 cm³/rev

• Maximum Operating Pressure: 275 bar (4,000 psi)

• Speed Range: 500 – 3,500 rpm

• Speed Range (Cold Start): Up to 1,500 rpm

• Rotation: CW, CCW, Bi-rotational available

• Mounting Options: SAE Standard Flange, Rectangular Flange

• Shaft Options: SAE Splined, Keyed, Tapered, Cylindrical

• Port Options: SAE Split Flange, Metric Split Flange

• Inlet Absolute Pressure: 0.8 – 2 bar abs

• Minimum Inlet Absolute Pressure: 0.5 bar abs (short-term no-load)

• Fluid Type: Hydraulic Oil HLP per DIN 51524-2

• Operating Viscosity Range: 8 – 1,000 mm²/s

• Cold Start Viscosity Range: 1,000 – 2,000 mm²/s

• Operating Temperature Range: -15°C to +80°C

• Cold Start Temperature Range: -20°C to -15°C

• Ambient Temperature Range: -40°C to +70°C

• Filtration Requirement: ISO 4406 Cl. 19/17/13

• Multi-Pump Configurations: Two or three section configurations available

• Inlet Configurations: Separate or common inlet available

• Weight: Approx. 12.6 kg (RPGP620 single pump reference)

Model Displacement Information:

7029122005:

• Series: PGP620

• Displacement: Standard PGP620 range (19 – 50 cm³/rev)

7029521045:

• Series: PGP620 / PGP350

• Reference: 2209366 6705K 7029522003

• Displacement: Standard PGP620 range (19 – 50 cm³/rev)

7029122021:

• Series: PGP620

• OEM Part Numbers: JCB 333/G5390, 333/G5393, 20/925581

• Displacement: Standard PGP620 range (19 – 50 cm³/rev)

• Known Configuration: PGP620B0410AD1A3MT4T3S-620A0160XE6E5B1B1

7029120053:

• Series: PGP620

• Known Configuration: PGP620B0330CE1H3WS7*D5C-620A02

• Displacement: Standard PGP620 range (19 – 50 cm³/rev)

Key Technical Advantages

1. Two-Piece Interlocking Cast Iron Housing — Superior Durability
The PGP620 Series features two-piece interlocking cast iron construction, providing excellent rigidity and impact resistance while ensuring precision assembly. The cast iron material ensures long-term reliability under harsh conditions, making it particularly suitable for high-load, high-impact construction machinery applications.

2. Pressure Balanced Thrust Plates — High Volumetric Efficiency
Pressure balanced thrust plates automatically compensate for gear end-face clearances, effectively minimizing internal leakage. Stable output flow and high volumetric efficiency are maintained under all operating conditions, enhancing overall system energy efficiency.

3. Low-Friction Journal Bearings — Long Service Life
The PGP620 Series utilizes low-friction journal bushings instead of traditional roller bearings, providing superior load-carrying capacity and wear resistance. Extended service life is achieved under continuous heavy-load conditions, reducing maintenance costs.

4. Flexible Configuration Options with Multi-Pump Combinations
The PGP620 Series supports clockwise, counterclockwise, and bi-rotational configurations. SAE standard flanges, shafts, and porting options are available. Two or three section multi-pump combinations are supported, facilitating system integration and expansion.

5. Wide Speed and Temperature Range
The PGP620 Series offers a speed range of 500 – 3,500 rpm, an operating temperature range of -15°C to +80°C, and cold start capability down to -20°C. The broad speed and temperature range enables flexible adaptation to diverse operating conditions—from cold regions to tropical environments.

Application Areas

• Backhoe Loaders: JCB 3CX, 4CX and other backhoe loader hydraulic working systems

• Excavating Loaders: Terex 760, 860 and other excavating loader hydraulic systems

• Construction Equipment: Hydraulic working systems and auxiliary hydraulic circuits for various construction machinery

• Agricultural Machinery: Agricultural equipment hydraulic systems

• Industrial Hydraulic Systems: Industrial hydraulic power units (HPU)

Expert Maintenance Tips

1. Installation Precautions

• The PGP620 Series offers uni-directional and bi-rotational options—verify that the system’s required rotation direction matches the pump‘s identification marking before installation.

• Ensure coaxial alignment between the pump and drive shaft. Direct drive with flexible coupling is recommended.

• Units subject to axial or radial loads must be specified with an outboard bearing.

• Inlet absolute pressure should be maintained at 0.8 – 2 bar abs.

2. Fluid Management

• Use hydraulic oil HLP conforming to DIN 51524-2.

• System fluid cleanliness should meet ISO 4406 Cl. 19/17/13 or higher.

• Operating viscosity should be maintained within 8 – 1,000 mm²/s.

• Operating temperature should be maintained within -15°C to +80°C.

• Cold start temperature should not fall below -20°C, with speed not exceeding 1,500 rpm.

• Prime the pump by filling the housing with hydraulic fluid through the suction port before initial start-up. Never run the pump dry.

3. Start-Up & Commissioning

• Use jog start method for initial start-up; verify correct rotation direction before continuous operation.

• Allow the pump to run under no-load (low pressure) conditions for 2-3 minutes to purge air and ensure proper lubrication.

• Gradually increase to operating pressure while monitoring noise, temperature, and system pressure for normal operation.

4. Routine Maintenance

• The PGP620 gear pump itself is maintenance-free; however, regular maintenance of the entire hydraulic system is essential for trouble-free pump operation.

• Inspect system fluid cleanliness and condition every 1,000-2,000 operating hours.

• Regularly replace return line filters and suction strainers to prevent contaminant ingress into the pump body.