Gear Pump (2 holes, 13 teeth) Low Pressure Pump Pilot Pump

Gear Pump (2 holes, 13 teeth) Low Pressure Pump Pilot Pump

2 month ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 4 year year

Product details

Gear Pump (2 holes, 13 teeth), Low Pressure Pump, Pilot Pump

1. Product Overview

This low-pressure pilot hydraulic gear pump adopts external meshing gear structure with 2 mounting holes and 13-tooth gear assembly. As an essential auxiliary power component of excavator hydraulic system, it supplies stable pilot pressure for operating joysticks, main control valve and hydraulic actuators. Strictly manufactured according to original installation dimensions, this pilot gear pump can directly replace OEM spare parts without modification. It is compatible with multiple excavator models including Takeuchi 135, Kobelco 135SR, Kobelco 200SR, Sumitomo 200-3 and Doosan 258. The product features compact layout, reliable sealing performance and strong anti-pollution capability, suitable for long-time continuous operation under complex construction conditions.

Model Feature Description

Low pressure pilot gear pump, structure: 2 holes, 13 teeth, dedicated for excavator pilot circuit.

2. Main Technical Parameters

Item Specification

Product Type External meshing hydraulic gear pilot pump

Structure Feature 2 mounting holes, 13-tooth gear set

Rated Working Pressure 3.5 ~ 5 MPa (low pressure pilot circuit)

Max Pressure 7 MPa

Rotation Speed 600 ~ 2600 rpm

Sealing Material NBR nitrile rubber, FKM optional

Applicable Fluid ISO VG46 anti-wear hydraulic oil

Operating Temperature -20℃ ~ +85℃

Application Circuit Excavator pilot control hydraulic system

Compatible Equipment Takeuchi 135, Kobelco 135SR, Kobelco 200SR, Sumitomo 200-3, Doosan 258

3. Working Principle

Driven by the main hydraulic pump or engine power take-off, the paired gears rotate inside the pump housing to generate vacuum suction and deliver low-pressure hydraulic oil to the pilot circuit of the hydraulic system. The pilot oil provides control pressure signal for multi-way valve spools, realizing remote control of boom, arm, bucket and slewing movements. Stable pilot pressure ensures sensitive and smooth operation of excavator control handles.

4. Core Advantages

1. Standard 2-hole 13-tooth structure, fully interchangeable with original pilot pump.

2. Optimized low-pressure design, stable output flow for pilot control loop.

3. Compact size, easy installation and replacement during equipment maintenance.

4. Low internal leakage, effectively avoiding slow response of control handles.

5. Good wear resistance, adapt to dusty construction site environment.

6. Cost-effective aftermarket spare part for excavator overhaul.

5. Application Range

This pilot gear pump serves as the pilot power source for the hydraulic system of Takeuchi 135, Kobelco 135SR, Kobelco 200SR, Sumitomo 200-3 and Doosan 258 excavators, widely used in municipal engineering, earthmoving and construction operations.

6. Common Faults & Replacement Suggestion

Typical failures: insufficient pilot pressure, sluggish joystick response, oil leakage from shaft seal, abnormal running noise. Replace the complete pilot gear pump assembly to recover normal operation of excavator control system.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

4 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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