CAT 325-9788 Slipper Piston Pump 125cc

Product Overview

The CAT 325-9788 Slipper Piston Pump 125cc is a genuine Caterpillar OEM hydraulic slipper piston pump engineered to provide a continuous flow of pressurized hydraulic fluid for heavy-duty steering applications. This 125 cc positive displacement pump converts mechanical energy into hydraulic power by reciprocating pistons with slipper pads against a swashplate, ensuring smooth, efficient, and reliable hydraulic performance under demanding operating conditions.

Manufactured to Caterpillar’s exact OEM specifications, the 325-9788 Slipper Piston Pump delivers a high power-to-size ratio, clockwise rotation, and consistent hydraulic pressure for steering systems on Caterpillar track-type tractors. Its robust design enables reliable operation with high-viscosity hydraulic fluids while maintaining excellent durability in harsh construction and mining environments.

Key Features

• Genuine Caterpillar OEM Slipper Piston Pump
• Part Number: 325-9788
• 125 cc hydraulic displacement
• Positive displacement hydraulic pump
• Clockwise (CW) rotation
• Designed for steering hydraulic systems
• High power-to-size ratio
• Smooth, continuous hydraulic flow with minimal pulsation
• Capable of operating under high pressure and temperature
• Suitable for high-viscosity hydraulic fluids
• Heavy-duty construction for demanding applications
• Direct OEM replacement for seamless installation and long service life

Technical Specifications

Note: Caterpillar has not published additional dimensional specifications for this part on the official parts catalog.

Application Information

The CAT 325-9788 Slipper Piston Pump is specifically designed to deliver a constant flow of pressurized hydraulic fluid to the machine’s steering system. The reciprocating pistons, guided by slipper pads on a swashplate, generate the hydraulic pressure required for smooth and responsive steering performance.

The pump provides:

• Continuous hydraulic fluid flow
• Stable steering pressure
• Smooth hydraulic operation with minimal pulsation
• High efficiency under heavy operating loads
• Reliable performance in high-pressure hydraulic circuits
• Long service life in severe construction and mining environments

Compatible Caterpillar Equipment

The CAT 325-9788 Slipper Piston Pump 125cc is compatible with the following Caterpillar equipment:

Track-Type Tractors

• D8
• D8R
• D8T

Compatibility should always be verified using the machine Product Identification Number (PIN) or serial number before ordering, as hydraulic system configurations may vary by machine arrangement.

Additional Compatibility Information

The 325-9788 Slipper Piston Pump is a configuration-specific hydraulic component. Before installation, verify:

• Machine model
• Product Identification Number (PIN)
• Machine serial number
• Existing hydraulic pump part number
• Pump displacement (125 cc)
• Rotation direction (Clockwise)
• Steering hydraulic system configuration
• Mounting arrangement and hydraulic port specifications

Changes to the original machine configuration may affect compatibility. Confirmation through Caterpillar parts information or an authorized Cat dealer is recommended.

Benefits

Installing a genuine CAT 325-9788 Slipper Piston Pump 125cc helps:

• Deliver reliable hydraulic flow for steering systems
• Maintain smooth and responsive steering performance
• Improve overall hydraulic system efficiency
• Withstand high-pressure and high-temperature operating conditions
• Handle high-viscosity hydraulic fluids with dependable performance
• Reduce downtime through OEM-quality reliability
• Simplify maintenance with a direct-fit Caterpillar replacement
• Ensure long-lasting durability and factory-engineered performance