705-51-20830 / 7055120830 Gear Pump for Komatsu D63 D65 Bulldozer

705-51-20830 / 7055120830 Gear Pump for Komatsu D63 D65 Bulldozer

This 705-51-20830 / 7055120830 gear pump assembly is supplied for Komatsu bulldozer and crawler dozer hydraulic system applications. Komatsu official parts information identifies 705-51-20830 as a Pump Assembly in the Gear Pump category.

Public product references commonly list this pump for Komatsu dozer models such as D63E-12, D65EX-15, D65EX-15E0 and D65WX-15. Other supplier references also list related applications such as D65EX-16, D65PX-15 and D65PX-16. Because pump configurations may vary by machine version and serial number, final fitment should be verified by the original pump number, shaft, mounting face, port layout and machine serial number.

Application and Fitment Reference

• Primary Part Number: 705-51-20830 / 7055120830

• Product Type: Gear Pump / Pump Assembly

• Machine Category: Komatsu Bulldozer / Crawler Dozer

• Common References: D63E-12, D65EX-15, D65EX-15E0, D65WX-15, D65EX-16, D65PX-15, D65PX-16

• Supply Type: Genuine, OEM, or replacement supply may be available depending on current stock.

Common Symptoms That May Require Pump Inspection

• Weak hydraulic response: dozer hydraulic functions respond slowly or inconsistently.

• Pressure loss: the system cannot maintain stable pressure during operation.

• Oil leakage: leakage appears around the pump body, ports, shaft seal or mounting area.

• Abnormal pump noise: whining, vibration or cavitation-like sound during operation.

• Oil contamination: dirty oil, blocked filters or air entry may accelerate internal pump wear.

Fitment Check Before Ordering

Before ordering this Komatsu 705-51-20830 gear pump, please compare it with your original unit. Important confirmation points include the original pump number, pump body shape, shaft type, mounting flange, port direction, hydraulic line connection and machine serial number.

For faster confirmation, please send clear photos of the old pump nameplate, shaft, ports, mounting face and machine model plate. This helps reduce wrong orders and confirms whether 705-51-20830 / 7055120830 is suitable for your Komatsu D63 or D65 dozer.

Installation and Maintenance Notes

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

• Inspect hydraulic oil and filters before installing the pump.

• Protect all pump ports from dust, water and metal particles during installation.

• Check shaft, port and mounting alignment before tightening hydraulic lines.

• After installation, run the machine at low speed first and check for leakage, abnormal noise and pressure instability.

Ordering Information

Topvelsun supplies gear pumps, hydraulic pumps, steering pumps, tandem pumps and pump assemblies for Komatsu, Caterpillar, Hitachi, Hyundai, Kobelco and other construction equipment. For this 705-51-20830 pump, please provide your machine model, serial number, original pump number and photos before quotation.

FAQ

Is 705-51-20830 mainly used for Komatsu excavators?

Public references mainly list 705-51-20830 / 7055120830 for Komatsu bulldozer and crawler dozer applications. It should not be described mainly as an excavator pump unless the original pump number and machine configuration confirm that application.

What is the relationship between 705-51-20830 and 7055120830?

7055120830 is the non-hyphen writing format of 705-51-20830. Both formats are commonly used in supplier listings and parts searches.

Which Komatsu models are commonly listed for this pump?

Common model references include Komatsu D63E-12, D65EX-15, D65EX-15E0, D65WX-15, D65EX-16, D65PX-15 and D65PX-16. Final fitment should be checked by original pump number, mounting, ports, shaft and machine serial number.

Is this a genuine, OEM or replacement pump?

Supply type may vary by inventory. Genuine, OEM, or replacement options may be available depending on stock. Please confirm the current supply type before ordering.

What should I send for fitment confirmation?

Please send the machine model, serial number, original pump number, pump nameplate photo, shaft photo, port layout photo and mounting face photo.