VOE14671408 Hydraulic Pilot Gear Pump for Volvo EC750D, EC750E Excavators

The SPARKLING MACHINERY NEW VOE14671408 Gear Pump Photo:

• • • • • • • • • Primary Machine Applications

                  This hydraulic gear pump is dedicated to Volvo’s heavy-duty, high-tonnage excavation platforms:

                  Machine Category	Compatible Models	Powertrain Placement
                  Mass Crawler Excavators	EC750D, EC750D L, EC750E, EC750E HR (High Reach)	Directly coupled to the main hydraulic pump drive PTO or engine flywheel housing

                  •  

Q&A

• • • • • • Q1: What are the primary signs that a pilot or charging gear pump like the VOE14671408 is failing?

          • A: Common indicators include a complete or partial loss of pilot control responsiveness (joysticks feel "dead" or require excessive effort to actuate functions), a distinct high-pitched whining or groaning noise from the pump tower, or a drop in pilot system pressure when checked at the diagnostic manifold block.

            Q2: Can a failure in the auxiliary gear pump affect the main high-pressure piston pumps?

          • A: Yes, absolutely. If this pump acts as a charge pump and fails or loses efficiency, it can cause cavitation in the main piston pumps due to a lack of adequate inlet priming pressure. Additionally, if the internal gears of the VOE14671408 break down mechanically, they will send sharp metallic debris downstream directly into the sensitive control valves and main hydraulic loop.

            Q3: Is it necessary to pre-fill the pump with oil before starting the engine after installation?

          • A: Yes, priming is mandatory. Running a newly installed hydraulic gear pump dry for even a few seconds during startup will score the internal wear plates and gear tips, permanently degrading its performance. Always manually fill the pump chambers with clean, factory-specified hydraulic oil through the inlet port prior to connecting the final lines and starting the machine.