PGP503 PGP505 PGP511 PGP517 Parker Gear Pump | 500 333 3349 Series

Product Overview

The 500 333 3349 is a series part number for the Parker Hannifin PGP500 series heavy-duty aluminum external gear pumps, covering PGP503, PGP505, PGP511, and PGP517 four frame sizes. This fixed-displacement pump series offers displacements ranging from 0.8 cc/rev to 70 cc/rev, meeting the flow requirements of hydraulic systems from light-duty to heavy-duty applications.

The PGP500 series represents Parker’s high-performance upgrade to the internationally recognized “bushing block” gear pump technology. Constructed with high-strength aluminum and featuring pressure-balanced thrust blocks and journal bearings, the series delivers high efficiency and low noise operation even at elevated working pressures.

Engineered as a direct OEM-replacement solution, the 500 333 3349 series gear pumps fully comply with Parker original design standards and SAE/ISO/DIN mounting interface specifications, offering 100% direct interchangeability with OEM pumps. Every unit undergoes 100% workload simulation testing prior to shipment, rigorously validating pressure retention, volumetric efficiency, and internal leakage performance to meet or exceed OEM standards.

Model & Part Number Reference:

• 500 333 3349 — PGP500 Series general part number (covers PGP503 / PGP505 / PGP511 / PGP517)

• 3349219084 — PGP511 Series specific part number (corresponds to PGM511A0100BL6H2NE3E3B1B1N2, etc.)

• 3349111502 — PGP series part number

• 3349131190 — PGP series part number

• 3349116200 — PGP series part number

PGP500 Series Frame Size Overview:

• PGP503 — Small frame (Group 1), displacement range 0.8 – 7.9 cc/rev

• PGP505 — Medium frame, displacement range 2 – 15 cc/rev

• PGP511 — Medium-large frame, displacement range 3 – 33 cc/rev

• PGP517 — Large frame (Group 3), displacement range 16 – 70 cc/rev

Technical Specifications 

PGP503 Series (Small Frame)

• Model: PGP503

• Displacement Range: 0.8 – 7.9 cc/rev

• Rated Pressure (Continuous): 275 bar

• Maximum Speed: 4000 rpm

• Gear Teeth: 9

• Body Material: Aluminum

• Weight: Approx. 2.8 kg (max)

PGP505 Series (Medium Frame)

• Model: PGP505

• Displacement Range: 2 – 15 cc/rev

• Rated Pressure (Continuous): 275 bar

• Peak Pressure (Intermittent): 300 bar

• Maximum Speed: 4000 rpm

• Gear Teeth: 13

• Body Material: Aluminum

• Weight: Approx. 2.8 kg (max)

• Operating Temperature Range: -15℃ to +80℃

PGP511 Series (Medium-Large Frame)

• Model: PGP511

• Displacement Range: 3 – 33 cc/rev

• Rated Pressure (Continuous): 250 bar

• Peak Pressure (Intermittent): 260 bar

• Maximum Speed: 4000 rpm

• Rated Speed: 3500 rpm

• Theoretical Max Flow: 66 L/min

• Gear Teeth: 12

• Body Material: Aluminum

• Weight: Approx. 4.6 kg (max)

• Operating Temperature Range: -15℃ to +80℃

PGP517 Series (Large Frame)

• Model: PGP517

• Displacement Range: 16 – 70 cc/rev

• Rated Pressure (Continuous): 250 bar

• Peak Pressure (Intermittent): 275 bar

• Maximum Speed: 3400 rpm

• Theoretical Max Flow: 168 L/min

• Gear Teeth: 13

• Body Material: Aluminum

• Weight: Approx. 30.8 lb (13.97 kg)

• Thru-Drive Capability: Yes

Key Technical Advantages

1. Full Series Coverage for Flexible Sizing
The PGP500 series offers four frame sizes—PGP503, PGP505, PGP511, and PGP517—with displacements from 0.8 cc/rev to 70 cc/rev. From light-duty material handling equipment to heavy-duty construction and agricultural machinery, there is a displacement option to suit every application.

2. High-Strength Aluminum Housing with Journal Bearing Design
The pump housing is manufactured from high-strength aluminum, delivering lightweight construction without compromising structural integrity. The journal bearing (plain bearing/bushing block) design provides superior shock load resistance and extended service life compared to rolling element bearings. Pressure-balanced thrust blocks ensure maximum efficiency across all operating conditions.

3. Optimized Gear Geometry for Low-Noise Operation
PGP503 features 9-tooth gears, PGP505 and PGP517 feature 13-tooth gears, and PGP511 features 12-tooth gears, with optimized flow distribution that significantly reduces pressure pulsation for exceptionally smooth and quiet operation. The PGP511 series also offers a “silent” version for applications with stringent noise requirements.

4. Superior High-Pressure Performance
Continuous operating pressure up to 275 bar (PGP503/PGP505), with high-strength materials and large shaft diameters that effectively reduce bearing loads for long-term stability under high-pressure conditions. PGP505 peak pressure reaches 300 bar.

5. Flexible Configuration and Integration Capability
The PGP500 series supports single, tandem, and multiple pump configurations. A wide range of mounting options (SAE, ISO, DIN) and shaft types (SAE splined, keyed, tapered, cylindrical) are available. Optional valve integration includes pressure relief, anti-cavitation, cross-port relief, solenoid unloading, proportional relief, and reversing valves.

6. 100% Factory Tested & Direct Interchangeability
Every unit undergoes 100% workload simulation testing prior to shipment, covering pressure retention verification, internal leakage detection, and flow validation. Fully compliant with Parker original design standards, with flange dimensions, shaft specifications, and mounting interfaces identical to OEM pumps—direct drop-in replacement with zero modifications required.

Application Areas

The 500 333 3349 / PGP500 series gear pumps are widely used in the hydraulic systems of the following equipment:

• Aerial Equipment: Aerial lifts, telescopic handlers

• Agricultural Machinery: Tractors, combine harvesters, sprayers, turf equipment

• Construction Equipment: Loaders, excavators, bulldozers

• Forestry Equipment: Brush chippers, skidders

• Material Handling Equipment: Forklifts, stackers, conveyors

• Vocational & Municipal Equipment: Street sweepers, municipal service vehicles

• Industrial Hydraulic Power Units: HPU systems

• Mobile Hydraulic Systems: Brake pumps, power steering pumps, lube pumps

Expert Maintenance Tips

1. Model Confirmation & Selection
500 333 3349 is a series part number. For actual selection, confirm the specific frame size (PGP503 / PGP505 / PGP511 / PGP517) and displacement based on system flow and pressure requirements. Verify the complete model code on the pump body before installation.

2. Rotation Direction Confirmation
The PGP500 series supports clockwise (CW), counterclockwise (CCW), and bi-rotational configurations. Before installation, always verify that the PTO rotation direction of the host machine matches the pump’s rotation direction—incorrect rotation will result in pump failure to prime and may cause severe damage to gears and bearings within a short period.

3. Installation Precautions

• Thoroughly clean the mounting flange and shaft mating surfaces before installation to ensure no debris remains

• Use Parker-specified torque values for mounting bolts (SAE 2-bolt or 4-bolt flange)—avoid over-tightening which may cause distortion of the aluminum housing

• Ensure correct connection of inlet, outlet, and drain ports

• Direct drive with flexible coupling is recommended—pumps subjected to axial or radial loads must be specified with an outboard bearing

4. First Start-Up and Bleeding

• Before first start-up, fill the pump with hydraulic oil through the inlet port—never start dry

• After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from the system

• Check for abnormal noise or leakage—aluminum housing pumps are particularly sensitive to cavitation

5. Fluid and Filtration

• Use high-quality mineral hydraulic oil (H-LP type) compliant with DIN 51524 standards

• Maintain system oil cleanliness to ISO 4406 16/13 or better

• Operating temperature should be maintained within -15℃ to +80℃

• Maintain operating viscosity within 8 – 1000 mm²/s

6. Periodic Maintenance

• Check mounting bolt torque every 1,000 operating hours

• Regularly monitor system operating pressure to ensure it does not exceed rated values for each series

• If flow output decreases, noise levels increase abnormally, or system temperature rises excessively, inspect and replace worn components promptly

• Regularly inspect and replace shaft seals to prevent leakage