31N6-10050 / 31N6-10051 Hydraulic Main Pump for Hyundai R210-7 R210LC-7

31N6-10050 / 31N6-10051 Hydraulic Main Pump for Hyundai R210-7 R210LC-7

The 31N6-10050 / 31N6-10051 hydraulic main pump is used for Hyundai excavator hydraulic system applications. It is commonly referenced with the pump code K3V112DT-1CER-9C32 and is mainly listed for Hyundai R210-7 and R210LC-7 excavators.

This pump should be selected by the original pump number and physical configuration, not by model name alone. Hyundai R210 series excavators may vary by production year, machine serial number, hydraulic controller, regulator type and previous repair history. Final fitment should be verified before ordering.

Cross Reference Numbers

Common reference numbers may include 31N6-10050, 31N610050, 31N6-10051, 31N610051 and K3V112DT-1CER-9C32. Related public supplier references may also include 31N6-10030, 31N6-10010 and 31N8-12020.

These numbers should be treated as reference information only. Hydraulic main pumps with similar numbers may still differ in regulator arrangement, solenoid connectors, drive shaft, mounting face, port layout or control configuration.

Application and Fitment Reference

This Hyundai 31N6-10050 hydraulic main pump is mainly referenced for R210-7 and R210LC-7. Some public supplier references also list related applications such as R220LC-7 and RC215C-7.

The model list should be used as a fitment reference, not a universal guarantee. Before purchase, compare the old pump label, pump code, regulator position, solenoid connector, shaft type, mounting face, inlet and outlet ports, case drain position and machine serial number.

Common Failure Symptoms

• Slow hydraulic movement: boom, arm, bucket, swing or travel functions respond slowly under load.

• Weak digging force: the excavator cannot maintain stable hydraulic pressure during heavy operation.

• Machine speed drops during combined movements: pump output, regulator control and pilot pressure should be checked.

• Abnormal pump noise: whining, vibration or cavitation-like sound may indicate air entry, suction restriction, oil contamination or internal wear.

• Hydraulic oil overheating: worn pump components, blocked filters, restricted oil flow or relief valve problems may increase oil temperature.

• Metal particles in oil or filters: internal pump wear or system contamination should be investigated before installing a replacement pump.

Troubleshooting Before Replacement

• Check hydraulic oil level, oil condition and contamination.

• Inspect suction lines, return lines, case drain lines and hydraulic filters.

• Check for air entry, loose fittings, damaged hoses or restricted suction flow.

• Measure main pump pressure, pilot pressure and case drain flow according to the machine service procedure.

• Inspect pump solenoids, regulator control, electrical connectors and pressure sensors.

• Check the main control valve, relief valves and cylinders if pressure loss or slow movement remains unclear.

• Compare the old pump nameplate and physical configuration before confirming the replacement pump.

Installation and Maintenance Notes

• Clean the pump mounting area and hydraulic line connections before removal.

• Cap all open hydraulic lines and pump ports to prevent dust, water and metal particles from entering the system.

• Inspect or replace hydraulic filters before installing the replacement pump.

• Flush the hydraulic system if metal particles, burnt oil or severe contamination are found.

• Pre-fill or lubricate the pump according to the service procedure before first startup.

• Check shaft engagement, mounting alignment, port direction and hose routing before tightening all lines.

• Start the engine at low speed first and check for leakage, abnormal noise, unstable pressure and excessive case drain flow.

• Do not operate the excavator under heavy load until oil flow, pressure, temperature and machine response are confirmed normal.

Fitment Check Before Ordering

To reduce wrong orders, please send the machine model, machine serial number, old pump nameplate photo, full pump view, regulator photo, solenoid connector photo, shaft photo, mounting face photo and hydraulic port layout photo before quotation.

FAQ

Is 31N6-10050 the same as 31N6-10051?

31N6-10050 and 31N6-10051 are commonly listed together in public supplier references for Hyundai R210-7 and R210LC-7 hydraulic main pump applications. Final confirmation should be made by the old pump nameplate and machine serial number.

What pump type is used for this hydraulic main pump?

The common pump type reference is K3V112DT-1CER-9C32. Some references may use the shorter K3V112DT family name.

Which Hyundai excavator models are commonly listed?

The main model references are Hyundai R210-7 and R210LC-7. Some public supplier references also list R220LC-7 and RC215C-7. Final fitment should be verified before ordering.

What related reference numbers may appear?

Related reference numbers may include 31N610050, 31N610051, 31N6-10030, 31N6-10010 and 31N8-12020. These should be used as reference numbers only and checked against the original pump.

What should be checked before ordering?

Please check the old pump number, pump code, regulator type, solenoid connector, drive shaft, mounting face, hydraulic port layout, case drain position and machine serial number. Clear photos of the old pump are recommended.