PGP PGM Series Hydraulic Gear Pump | 7029121002 6111152M92 Replacement | High Pressure Cast Iron Pump

The PGP/PGM Series high-pressure cast iron gear pumps/motors by Chengyuan Hydraulic are engineered for heavy-duty industrial and mobile applications. Specifically designed to replace OEM parts such as 7029121002, 6111152M92, and 7993303R, these units guarantee 100% original-place interchangeability. Unlike standard aluminum pumps, our PGP series utilizes high-tensile cast iron construction to handle extreme pressure spikes. Every unit undergoes 100% simulated condition testing to ensure peak volumetric efficiency and rugged durability in the field.

Technical Specifications (Bulleted List)

• Series: PGP/PGM High-Pressure Cast Iron Series

• Interchangeable OEM Codes: 7029121002, 6111152M92, HPX52069, 7993303R

• Displacement Range: $10\text{–}100\text{ ml/rev}$

• Rated Operating Pressure: $21\text{–}24.5\text{ MPa (3045–3550 psi)}$

• Peak Pressure: $27.5\text{ MPa (4000 psi)}$

• Speed Range: $500\text{ to }3000\text{ RPM}$

• Drive Configuration: SAE Standard Splined, Keyed, or Tapered shafts

• Housing Material: Heavy-duty Grey Cast Iron

• Working Medium: Mineral oil-based hydraulic fluids

Key Technical Advantages

• High-Tensile Three-Piece Cast Iron Body: The robust cast iron housing provides superior mechanical strength and thermal stability compared to aluminum. This minimizes housing expansion under high pressure, maintaining tight internal clearances and reducing noise.

• Axial Pressure-Balanced Thrust Plates: Utilizing premium bronze alloy thrust plates, the pump features automatic axial compensation. This ensures the plates stay perfectly flushed against the gear faces, maintaining over $93\%$ volumetric efficiency.

• Induction Hardened Gear Shafts: The gears are forged from high-quality alloy steel, followed by induction hardening and precision grinding. The high-accuracy gear profile ensures smooth power transmission and exceptional resistance to shock loads.

• Heavy-Duty DU Bearings: Equipped with high-load composite DU bushings, our pumps offer excellent self-lubricating properties. This protection is critical for maintaining shaft integrity even when oil cleanliness is less than ideal.

Application Areas

• Agricultural Machinery: Main lift and steering pumps for Massey Ferguson and other major tractor brands.

• Construction Equipment: Pilot systems for excavators, main pumps for forklifts, and auxiliary circuits for loaders.

• Material Handling: Truck-mounted cranes, refuse compactors, and lifting boom systems.

Expert Maintenance Tips

• System Flushing: Before installing a new pump, thoroughly flush the hydraulic system and replace all filters to prevent residual contaminants from damaging the new gear surfaces.

• Inlet Vacuum Control: Gear pumps are sensitive to cavitation. Ensure the suction line is airtight and that the suction strainer has a flow capacity at least twice the pump’s rated flow.

• Initial Priming: Fill the pump with clean hydraulic oil through the inlet port before startup. Jog the prime mover for $5\text{–}10$ minutes at low speed without load to purge air before increasing system pressure.