255-6805 Fan Motor For Caterpillar 980G and 980H wheel loader

255-6805 Fan Motor For Caterpillar 980G and 980H wheel loader Featured Image
  • 255-6805 Fan Motor For Caterpillar 980G and 980H wheel loader

Short Description:

255-6805 hydraulic fan motor is aftermarket replacement for Caterpillar 980G and 980H large wheel loader cooling system. It is a dedicated hydraulic piston motor to drive the cooling fan assembly.

Product Detail

Product Tags

description

255-6805 hydraulic fan motor is the core executive component of cooling circuit for CAT 980G and 980H wheel loaders. Driven by hydraulic oil supplied by fan pump, it converts hydraulic pressure into mechanical torque to run the radiator fan. By receiving variable flow from fan pump, the motor changes rotating speed dynamically to match heat dissipation demand. When the machine works under heavy load, fan speed rises to enhance cooling; under light load, it reduces speed to save power and cut fuel consumption.
Key internal components adopt high-strength alloy steel with precision grinding and nitriding treatment. Piston, cylinder block, valve plate and sliding shoes feature excellent wear resistance, coping with long-duration continuous rotation and frequent speed changes. The housing is cast from high-density cast iron, with stress relief annealing to eliminate residual stress, resisting impact and vibration from harsh working environment.

product parameters

Part No：255-6805
Product Type：Hydraulic Piston Fan Motor
Applicable Equipment：CAT 980G, CAT980H Large Wheel Loader
Control Mode：Hydraulic Variable Speed Control
Displacement：26 cc/rev
Nominal Working Pressure：21 MPa (210 bar)
Max Instantaneous Peak Pressure：25 MPa (250 bar)
Rated Rotation Speed：2200 rpm
Max Allowable Rotation Speed：2600 rpm
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-25℃ ~ +110℃
Main Material：Cast iron housing, high-strength alloy steel core parts, FKM fluorine rubber seal
Surface Treatment：Precision grinding, nitriding hardening, stress relief annealing, anti-rust coating
Shaft Specification：Original standard splined shaft
Interchangeability：1:1 OEM original interchangeable, direct installation without modification
Product Condition：Brand new aftermarket part, 100% hydraulic bench tested

advantage

- 1:1 OEM full interchange, bolt-on fitment without modification
Manufactured strictly according to CAT 980G/980H cooling system drawings. Mounting holes, oil ports and spline shaft fully match original 255-6805. Direct replacement cuts machine downtime and service labor cost.
- Hydraulic variable speed design, intelligent heat management and power saving
Motor speed changes automatically with hydraulic flow. It raises fan speed under heavy load for heat dissipation and lowers speed at light load to reduce unnecessary power consumption and fuel waste.
- Robust cast iron housing, strong dust and vibration resistance for quarry environment
Thick cast iron housing with stress relief treatment. It withstands heavy dust, continuous vibration and impact in mining and quarry sites, preventing housing deformation and cracking.
- Premium FKM sealing assembly, wide temperature adaptability
High-quality FKM seals resist high temperature and oil aging. Stable sealing reduces external oil seepage and internal leakage, maintaining consistent cooling circuit pressure.
- Full bench inspection before delivery, reliable and low failure rate
Each fan motor undergoes torque, rotating speed and pressure retention testing. Strict QC ensures performance meets OEM specifications for cooling system operation.

FAQ 

Q1: What machine does 255-6805 fan motor fit?
A1: This hydraulic fan motor is specially designed for CAT980G and CAT980H large wheel loaders. It cannot be used on 980K/980M or other loader models. Confirm machine serial number and part number before purchase.

Q2: Can 255-6805 replace main hydraulic pump 235-2716?
A2: No. 255-6805 is fan motor for cooling circuit, while 235-2716 is main pump for boom and bucket. They belong to different hydraulic components and cannot substitute each other.

Q3: What symptoms indicate fan motor failure?
A3: Common signs: fan does not spin or runs at fixed low speed, engine or hydraulic oil overheating, abnormal noise from fan drive area, oil leakage at motor shaft or housing.

Q4: What must be checked before installing the new fan motor?
A4: Inspect the matched fan pump, pressure relief valve and hydraulic filter. Clean pipelines and remove metal debris. Check fan blade for damage or imbalance before assembly.

Q5: Does air bleeding matter for fan motor installation?
A5: Yes. Air trapped inside cooling hydraulic circuit will cause cavitation, noise and insufficient fan torque. Complete air bleeding after installation is required.

Q6: What hydraulic oil is recommended for this fan motor?
A6: Use ISO VG46 anti-wear hydraulic oil. Operating temperature range -25℃~110℃. Do not mix different oil brands, and avoid long time over-temperature operation.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.

our warehouse

our warehouse

Pack and ship

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