Hydraulic Fan Motor Failure on the 2001 CAT 262 Skid Steer

[MikePhua]

The CAT 262 and Its Cooling System Design
The Caterpillar 262 skid steer loader, introduced in the early 2000s, was part of CAT’s effort to expand its compact equipment lineup with higher horsepower and improved hydraulic performance. Designed for demanding applications in construction, landscaping, and municipal work, the 262 featured a hydraulic-driven cooling fan system rather than a belt-driven configuration. This design allowed for variable-speed fan control based on engine temperature and hydraulic load, improving fuel efficiency and reducing noise.
The hydraulic fan motor, mounted near the radiator and oil cooler, is a critical component in this system. It receives pressurized fluid from the auxiliary hydraulic circuit and converts it into rotary motion to drive the cooling fan. The motor is compact, sealed, and designed for continuous operation under high temperatures. However, like many hydraulic components, it is vulnerable to seal degradation, contamination, and internal wear over time.
Identifying the Motor and Its Replacement History
In one case, a technician working on a 2001 CAT 262 (serial number CED00263) removed the fan motor and identified it as part number 169-6700. This motor was later superseded by part number 216-6163, a change made by Caterpillar around December 2001. The updated motor is functionally similar but may include minor design revisions for durability or compatibility.
Terminology and component notes:
- Hydraulic Fan Motor: A rotary actuator powered by hydraulic fluid, used to drive the cooling fan.
- Seal Kit: A set of O-rings, gaskets, and shaft seals used to rebuild hydraulic components.
- Figure-8 Gasket: A specific gasket shape used in hydraulic motor housings, often difficult to source outside OEM channels.
- CAT SIS: Caterpillar’s Service Information System, a database for parts, service manuals, and technical bulletins.
Rebuild Feasibility and Manufacturer Limitations
Upon inspection, the technician found no rebuild kits available for the 169-6700 motor. This was confirmed by multiple sources, including experienced mechanics familiar with CAT’s hydraulic systems. The motor is considered non-serviceable by Caterpillar, meaning it must be replaced entirely when it fails. The same applies to the 216-6163 motor, which also lacks internal serviceable parts according to CAT documentation.
This limitation stems from the fact that the motor is not manufactured by Caterpillar directly. It is likely produced by a third-party supplier such as Rexroth, Eaton, or Parker, and rebranded with a CAT part number. Without direct access to the original manufacturer’s specifications or internal part numbers, sourcing seals or internal components becomes nearly impossible.
Recommendations:

• Replace the motor with a new OEM unit (approximate cost: $900)
  
• Avoid aftermarket rebuild attempts unless the motor is positively identified by its original manufacturer
  
• Inspect hydraulic lines and fittings during replacement to prevent contamination
  
• Flush the cooling circuit and replace hydraulic fluid if oil spray or leakage occurred
  

Failure Symptoms and Operational Impact
Hydraulic fan motor failure typically presents as:

• Oil leakage from the motor housing, especially at high temperatures
  
• Reduced fan speed or intermittent operation
  
• Overheating of engine and hydraulic systems
  
• Visible oil spray on surrounding components
  

In one related case involving a CAT 246, the fan motor began spraying oil when the machine reached operating temperature. The top seal had failed, and while it was technically replaceable, sourcing the correct gasket proved difficult. The technician ultimately replaced the entire motor to restore cooling performance.
Preventative Measures and Long-Term Solutions
To extend the life of the hydraulic fan motor:

• Monitor hydraulic fluid temperature and pressure regularly
  
• Replace fluid and filters at recommended intervals (typically every 500 hours)
  
• Use CAT-approved hydraulic oil with anti-wear additives
  
• Inspect motor housing and fittings during routine service
  
• Avoid prolonged operation in high ambient temperatures without adequate airflow
  

For machines operating in dusty or high-debris environments, consider installing a fan shroud or debris screen to reduce contamination risk. Excessive dust can accelerate seal wear and clog cooling fins, leading to thermal stress on the motor.
Conclusion
The hydraulic fan motor on the 2001 CAT 262 skid steer is a sealed, non-serviceable unit that must be replaced when it fails. While rebuild attempts may seem appealing, the lack of available seal kits and internal parts makes them impractical. With proper maintenance and early detection of leaks, operators can avoid overheating and preserve the integrity of the cooling system. In compact loaders, cooling is the silent guardian—and when the fan falters, the entire machine feels the heat.