133-6911 A8VO107 1-Section Gear Pump for Caterpillar 320B 321B 322B 325B Excavator

133-6911 Gear Pump for A8VO107 Applications

133-6911 is a compact 1-section hydraulic gear pump used on selected Caterpillar excavator hydraulic systems, including machines equipped with A8VO107-type main pump arrangements. It is a separate gear pump component and should not be confused with the complete A8VO107 axial piston main pump.

Caterpillar lists 133-6911 as a hydraulic gear pump for equipment including the 320B, 321B, 322B, 325B and related configurations. The exact application should still be checked against the original pump, machine serial number and mounting configuration before ordering.

How to Identify the Correct 133-6911 Pump

Before replacement, compare the drive spline, mounting flange, bolt-hole pattern, pump body shape and hydraulic ports with the removed unit. These compact gear pumps can appear very similar externally while using different shafts or mounting arrangements.

Clear photos of the drive side, mounting face, inlet and outlet ports and the original part number are especially useful for confirmation. Do not identify the pump only by the A8VO107 main pump model.

Caterpillar Fitment and Installation Checks

Typical applications include Caterpillar 320B, 321B, 322B, 325B and M325B equipment. Caterpillar also lists the 539 knuckleboom loader among applications for 133-6911. Machine serial number and original hydraulic configuration should be used for final fitment verification.

Before installation, clean the hydraulic circuit and inspect the oil and filters for contamination. Confirm shaft engagement, mounting alignment and port connections before starting the machine. After installation, run the system at low load first and check for leakage, abnormal noise and unstable hydraulic response.

Topvelsun Supply Support

Topvelsun supplies hydraulic gear pumps and excavator hydraulic components with 1-piece MOQ and a 6-month warranty. Send the original part number, machine model, serial number and clear photos of the removed pump for parts confirmation before ordering.

FAQ

What is Caterpillar part number 133-6911?

133-6911 is a 1-section hydraulic gear pump used in selected Caterpillar excavator and heavy equipment hydraulic systems.

Is 133-6911 the complete A8VO107 main hydraulic pump?

No. 133-6911 is a separate hydraulic gear pump component associated with applicable A8VO107 pump configurations. The complete A8VO107 is an axial piston variable double pump assembly.

Which machines use the 133-6911 gear pump?

Caterpillar lists applications including 320B, 321B, 322B, 325B, M325B and related configurations. Confirm the machine serial number and original pump before ordering.