Used Caterpillar Secondary Hydraulic Pump: Reliable Solutions for Your Construction Equipment

Why choose a used Caterpillar hydraulic pump at Codimatra

Every Caterpillar secondary hydraulic pump in our inventory comes from the systematic dismantling of carefully selected machines. Before sale, each pump undergoes bench testing: flow rate, operating pressure, and seal integrity are checked. This rigorous process ensures you replace a faulty pump with a proven spare part, at a fraction of the new part cost, without long downtime for your machine. Our teams rely on the full range of used hydraulic pumps and all available Caterpillar parts to find the reference suited to your equipment.

Caterpillar equipment covered by our inventory

• Crawler excavators from series 320 to 374, including the most common models in the French fleet.
• Wheel loaders from series 906 to 992, servicing steering and braking circuits.
• Bulldozers from D4 to D8, enduring intense vibrations from heavy earthmoving.
• Rigid and articulated dump trucks, including series 769 to 773.
• Backhoe loaders, notably models in the 428 family.
• Compactors, milling machines, and wheel excavators from series M312 to M325.

Caterpillar 320 Hydraulic Pump: The standard for crawler excavators

The 320 series is one of the most common Caterpillar excavators on job sites, making the Caterpillar 320 hydraulic pump one of the most requested references in our stock. Our used secondary pumps cover generations 320, 320B, 320C, and 320D, as well as nearby series 318, 319, 322, 323, and 325. Each pump is identified by its manufacturer serial number, allowing exact matching with your machine before shipping. You can also browse all our Caterpillar crawler excavator parts.

Understanding the Caterpillar hydraulic circuit

• The main pump powers the working functions: boom, stick, bucket, and travel.
• The secondary hydraulic pump handles auxiliary circuits: steering, braking, cooling, and swing hydraulic pump on some models.
• The hydraulic distributor directs flow to actuators based on operator commands.
• Diagrams and specifications vary by series and year: our specialists assist you in identifying the correct technical documentation for your exact model.

What are the three types of hydraulic pumps?

Axial piston pumps equip high-pressure circuits: their high efficiency makes them the standard technology for main circuits and many hydraulic excavator secondary pumps. Gear pumps, robust and easy to maintain, are common on auxiliary circuits of loaders and backhoe loaders. Finally, vane pumps suit moderate pressure applications like power steering. The pump type installed on your Caterpillar machine depends on the series and the function served: verify the original reference before any replacement.

How do I know if the hydraulic pump is faulty?

• Jerky or slow equipment movements, gradual loss of hydraulic power.
• Unusual cavitation noise, whistling or metallic rumbling at the pump.
• Overheating of the circuit beyond normal operating temperatures.
• Oil leaks around seals and fittings.
• Excessive vibrations at the supply connections.

If several of these symptoms occur, have the circuit inspected before contamination spreads to other components. Our teams can help you choose the right replacement pump.

Compatibility: choosing your replacement pump correctly

To identify the correct Caterpillar secondary hydraulic pump, note your machine's exact model, year, and if possible, the original component serial number. Two generations of the same series may use pumps differing in flow rate, pressure, or mounting interface. Provide this information to our teams: they verify matching in our technical database and confirm compatibility before shipment. This is the safest approach for buying and selling equipment without surprises.

Our related services

• Bench testing each pump before shipment: flow rate, pressure, seal integrity.
• Personalized technical advice to check compatibility with your equipment.
• Fast shipping within France and Europe, with reinforced packaging.
• Online quote requests with no obligation to buy.