803004079 gear pump for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Part Number：803004079
Product Name：Gear Pump
Applicable Model：XCMG ZL50G, ZL50GL Wheel Loader
Material：High-strength cast iron pump body, alloy steel gear and shaft
Sealing Parts：Nitrile rubber / fluororubber seal ring
Rated Working Pressure：System design pressure
Rotation Direction：Clockwise rotation (viewed from spline end)
Working Medium：L-HM46 anti-wear hydraulic oil
Working Temperature：-20℃ ~ 80℃
Connection Form：Flange mounting, spline drive
Inspection Items：Volumetric efficiency test, pressure holding test, noise test, dimensional inspection, leakage detection

Applicable Scenarios

It is applied to the hydraulic cooling oil circuit of 5-ton wheel loader, matched with hydraulic oil radiator, suitable for earthwork, quarry, sand yard, port bulk cargo loading and other long-time continuous heavy-load construction scenarios.

• Manufactured according to OEM standards, the installation flange, spline and oil port size are consistent with original pump, direct replacement without modification.
• Alloy gear and floating side plate structure, small internal leakage, high volumetric efficiency and stable flow output.
• Thick cast iron pump body, good rigidity, strong vibration and impact resistance, not easy to deform under long-time load.
• Simple internal structure, low failure rate, convenient disassembly, inspection and maintenance.
• Strong medium pollution resistance, tolerant to a certain degree of oil impurity, suitable for harsh construction site environment.
• Stable low-noise operation, effectively maintain the working temperature of hydraulic oil and protect main hydraulic components.
• Strict factory hydraulic performance test, uniform batch quality, easy spare parts stocking.

FAQ 

Q: What will happen if the gear pump is installed with wrong rotation direction?
A: Wrong rotation will reverse the oil inlet and outlet, the cooling circuit cannot supply oil normally, the hydraulic oil temperature will rise rapidly.

Q: What are the main reasons for insufficient pump flow and weak heat dissipation?
A: It may be oil suction pipeline air intake, serious internal wear of gear and side plate, oil filter blockage or oil viscosity too high.

Q: What should be checked before installing the gear pump?
A: Check the pump body for cracks and damage, confirm that the spline is intact, clean the oil passage to avoid sundries entering the pump cavity.

Q: Can I continue to use the pump with oil seepage at the shaft seal?
A: Shaft seal leakage indicates that the sealing assembly has failed. It is recommended to replace the seal or the whole pump in time.

Q: What influence will oil pollution bring to the gear pump?
A: Hard particles in the oil will scratch the gear, side plate and sealing surface, accelerate wear and sharply reduce the service life.

Q: What is the correct maintenance cycle for this cooling gear pump?
A: Regularly check the oil temperature and pump noise; replace hydraulic oil and filter according to the equipment maintenance manual.