KP30.34-A8K9 Fan Pumps for SDLG 360, SDLG 400, SDLG 500, SDLG 600, SDLG 650
2 week ago
Product details
KP30.34-A8K9 Hydraulic Fan Pump
1. Product Overview
KP30.34-A8K9 is an OEM gear type fan pump specially designed for SDLG wheel loaders, including SDLG 360, 400, 500, 600, 650 models. This hydraulic gear pump is the core power component of the cooling system hydraulic circuit. It provides regulated pressurized oil flow to drive the cooling fan motor, controlling the rotation speed of radiator fan to cool engine coolant, hydraulic oil cooler and intercooler. It effectively prevents overheating issues during long-time heavy-duty work in construction sites, mines and earthmoving projects. This pump is a direct aftermarket replacement part with exactly the same installation dimensions and hydraulic parameters as original factory components.
Model Interpretation
- KP30: Series code of heavy-duty gear pump exclusively used for construction machinery cooling fan systems
- 34: Displacement 34 mL/rev
- A8K9: Custom code for port position, rotation direction, built-in pressure setting and valve configuration, calibrated strictly to match SDLG original hydraulic system.
2. Main Technical Parameters
Item Specification
Model KP30.34-A8K9
Type External meshing hydraulic gear pump
Displacement 34cc/rev
Rated working pressure 20 MPa
Peak pressure 25 MPa
Rotation speed range 700 ~ 2800 rpm
Applicable hydraulic oil ISO VG46, VG68 anti-wear hydraulic oil
Working temperature -20℃ ~ +90℃
Mounting form Engine auxiliary flange installation
Seals Standard HNBR nitrile rubber seals; FKM high temperature seals optional
Structure Floating side plate clearance compensation, anti-pollution design
Applicable machines SDLG 360, 400, 500, 600, 650 wheel loaders
3. Working Principle
Driven by engine gearbox power take-off, the KP30.34-A8K9 gear pump creates vacuum at the inlet side, draws hydraulic oil from the hydraulic tank. Two meshing gears carry oil from suction port to pressure port and build system pressure. The pressurized oil flows to the fan motor, forming a closed hydraulic loop for fan drive. Combined with the machine electronic control unit, flow changes automatically to adjust fan speed: high speed for heat dissipation under high temperature condition, low speed to reduce power loss when temperature is normal. The internal pressure setting avoids overload damage if the fan is blocked by debris.
4. Product Advantages
1. Specially calibrated parameters for SDLG multiple loader models, perfectly matched with original hydraulic system, plug and play without adjustment.
2. Floating side plate structure reduces internal leakage, maintains stable efficiency after long hours of operation.
3. Excellent anti-contamination performance, suitable for dusty and harsh construction working environments.
4. Compact structure, same mounting hole positions as original pump, convenient for field replacement.
5. Stable pressure output, greatly reduces high water temperature and high hydraulic oil temperature failures of SDLG loaders.
5. Application Range
This fan pump is the standard cooling system component for SDLG 360, 400, 500, 600, 650 wheel loaders. It is widely used in mining, quarrying, road construction and bulk material handling working conditions.
6. Common Failures & Replacement Advice
Replace the whole pump assembly when these problems occur: insufficient fan speed leading to overheating alarm, oil leakage from shaft seal or flange surface, abnormal grinding noise inside the pump, no pressure output. Mixed use of different model pumps will cause parameter mismatch and continuous overheating.
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