254-5147/186-3732 Fan Pump for Caterpillar 972H wheel loader

product parameters

Part No：254-5147 / 186-3732
Type：Variable Displacement Axial Piston Fan Pump
Applicable Equipment：CAT972H Wheel Loader
Material：High strength cast iron housing, alloy steel piston assembly
Surface Treatment：Anti-rust coating, internal cavity flushing and cleaning
Control Mode：Hydraulic variable control
Feature：High volumetric efficiency, low internal leakage, stable pressure output, fast temperature response, strong shock resistance
Working Temperature：-20℃ ~ +110℃
Max working pressure：29MPa
Displacement：Variable
Dimensional tolerance：ISO2768-m standard
Shaft specification：Matched OEM shaft standard
Condition：Brand new, 100% hydraulic bench test, flow & leakage inspection
Package：Independent anti-rust packing + Standard export carton
Storage suggestion：Keep dry, avoid moisture, rust and collision, indoor constant temperature storage, stay away from corrosive gas

• High-strength cast iron housing. Precision casting plus stress relief annealing treatment. Excellent structural rigidity and shock resistance. It reliably withstands fluctuating hydraulic pressure and cyclic vibration during loader operation. It is not prone to deformation under continuous heavy-duty working conditions and maintains steady hydraulic output.
• Precision lapped internal friction pairs. Pistons, slippers and valve plate are machined to tight tolerance. It achieves higher volumetric efficiency and lower internal leakage. The variable control mechanism responds quickly to temperature changes to automatically adjust fan rotating speed.
• Strong adaptability to harsh construction environments. Outer surface is coated with anti-rust protective layer. It can resist dust, mud, temperature fluctuation and continuous vibration on job sites, reducing risks of abrasion, cavitation and premature wear during long service cycles.
• Strict multi-stage inspection before shipment. Each pump is tested on hydraulic bench to check pressure, flow rate and external leakage. Shaft dimension and assembly quality are fully verified. Batch consistency is guaranteed, and non-conforming products are eliminated before packing.
• Protect the whole cooling hydraulic circuit. Stable pressure and flow supply maintain suitable fan speed. Prevent engine overheating, safeguard fan motor, hydraulic hoses and sealing components against sudden pressure spikes, cutting down secondary damage of cooling related parts.

FAQ 

Q1: Which machine does 254-5147/186-3732 fan pump fit? Can it replace other part numbers?
A1: It is specially designed for CAT972H wheel loader. Not universal for other CAT models. Mismatched pumps may cause insufficient fan speed, engine overheating, pressure surge and damage to fan motor. Please carefully verify machine model and OEM part number before purchase.

Q2: What tests are performed before shipment?
A2: Every fan pump is 100% inspected on hydraulic test bench. Tests include pressure test, flow measurement, internal & external leakage inspection and dimensional verification. Simulated load assessment to guarantee stable performance after installation.

Q3: Is special adjustment required after installation?
A3: Precisely manufactured according to OE dimensions, direct installation normally. After fitting, bleed air from hydraulic circuit. If engine temperature remains high, check system pressure and variable control response.

Q4: What pre-installation work helps extend service life?
A4: Clean hydraulic pipeline thoroughly, flush old contaminated oil. Replace filters and check oil cleanliness. Inspect fan motor, hoses and seals. After installation, run no-load test and monitor pressure and temperature before heavy load work.

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