PGP365 Parker Gear Motor 44-147cc 241bar Cast Iron

Product Overview

The PGP365 / PGM365 (complete model examples: 322-9120-181, PGP365B578SEAB15-7*SHAB15-1 and related PGP350, PGM315, PGM330, PGM350 series) is a Parker PGP/PGM 300/365 series heavy-duty cast-iron external gear hydraulic motor (and pump). Featuring three-piece cast-iron construction, balanced thrust plates and journal bearings, it delivers high volumetric efficiency and durability optimized for high-duty-cycle mobile applications. This unit offers full dimensional and functional interchangeability with genuine Parker PGP/PGM 365 series units, matching flange, shaft, ports and overall envelope for direct drop-in replacement. Every unit undergoes 100% simulated operating-condition testing to guarantee consistent performance under high pressure, speed and continuous load.

Technical Specifications 

• Model: PGP365 / PGM365 (typical codes: 322-9120-181, PGP365B578SEAB15-7*SHAB15-1 etc.; related PGP350, PGM315/330/350)
• Displacement: 44.3–147.5 cm³/rev (2.70–9.00 in³/rev, depending on gear width 07–25)
• Continuous working pressure: up to 241 bar (3500 psi for smaller sizes); larger sizes 207–224 bar
• Peak pressure: intermittent ratings higher depending on configuration
• Maximum speed: 2400 rpm
• Control: Fixed-displacement external gear motor (bi-rotational options available)
• Weight: approx. 24.3–32.2 kg (depending on displacement)
• Mounting: SAE standard flanges
• Shaft options: SAE splined, keyed, etc.
• Design features: Three-piece cast-iron housing, balanced thrust plates, journal bearings

Data compiled from official Parker PGP/PGM 365 series technical documentation. Exact values depend on the specific model code.

Key Technical Advantages

1. Three-piece cast-iron heavy-duty construction: High-strength cast-iron body provides excellent durability and shock resistance for high-cycle mobile applications.
2. Balanced thrust plates and journal bearings: Minimize friction and leakage for high volumetric efficiency (up to 98%) and long bearing life.
3. Full interchangeability: Flange, shaft, ports and overall dimensions match genuine Parker PGP/PGM 365 series units exactly, enabling direct replacement without interface modifications and minimizing downtime.
4. Multi-section and valve integration capability: Supports single, tandem, multiple configurations plus load-sense, priority flow and other integrated valve options for system flexibility.
5. 100% simulated-condition testing: Every unit is fully tested for pressure, speed, leakage and noise characteristics prior to shipment, ensuring consistent out-of-box performance.

Application Areas

• Construction and forestry equipment
• Oil & gas and mobile hydraulic systems
• Salt/sand spreaders, aerial lifts, trailers
• High-cycle heavy-duty open-circuit drives

Expert Maintenance Tips

1. Before installation, thoroughly clean the shaft and flange face; use correct seals and bolt torque values to avoid misalignment or sealing-surface damage.
2. The system must include adequate filtration and overpressure protection; use anti-wear hydraulic oil (viscosity 50–7500 SUS) and maintain cleanliness levels to prevent accelerated wear.
3. Fully warm up the system and verify oil level and circuit pressure before starting; avoid dry starts and observe radial load limits (use outboard bearing if required).
4. Regularly monitor leakage rate, noise and temperature; when changing fluid and filters, follow recommended grades.
5. Protect shaft and ports against corrosion during storage; avoid prolonged exposure to moisture or corrosive environments.