ASV RC-60 Hub Noise Diagnosis and Solutions

[MikePhua]

The RC-60’s Role in Compact Track Loader Evolution
The ASV RC-60 compact track loader was introduced in the early 2000s as part of ASV’s push to redefine traction and stability in mid-sized earthmoving equipment. ASV, founded in 1983 in Minnesota, pioneered rubber track undercarriages with suspended bogie systems, offering superior ride quality and ground pressure distribution. The RC-60, with its 60-horsepower Perkins diesel engine and patented Posi-Track system, quickly became a favorite among landscapers, utility contractors, and rental fleets.
By 2005, ASV had sold thousands of RC-series machines across North America, and the RC-60 stood out for its balance of power, maneuverability, and terrain adaptability. Its undercarriage design allowed it to operate in mud, snow, and sand with minimal rutting, making it ideal for sensitive job sites.
Understanding the Hub Assembly and Terminology
The RC-60 uses a planetary final drive system housed within a sealed hub assembly. This system converts hydraulic motor output into torque for the drive sprockets, enabling smooth and powerful track movement.
Terminology note:

• Planetary Final Drive: A gear system that multiplies torque using sun, planet, and ring gears within a compact housing.
  
• Hub Noise: Unusual sounds originating from the drive hub, often indicating wear, contamination, or bearing failure.
  
• Posi-Track System: ASV’s proprietary undercarriage design using rubber tracks and suspended bogie wheels for improved traction and ride quality.
  

The hub assembly is filled with gear oil and sealed with O-rings and gaskets to prevent contamination. Bearings and gear teeth operate under high loads, and any deviation in lubrication or alignment can lead to noise, vibration, or failure.
Common Causes of Hub Noise
Operators have reported grinding, clicking, or whining noises from the RC-60’s hub area, especially during turns or under load. These symptoms often point to internal wear or oil starvation.
Typical causes include:

• Low or contaminated gear oil
  
• Worn bearings or race surfaces
  
• Damaged planetary gears
  
• Loose sprocket bolts or misaligned drive components
  
• Water ingress through failed seals
  

In one case, a contractor in Oregon noticed a rhythmic clicking sound during reverse travel. Upon inspection, the hub oil was milky and low, indicating water intrusion. Replacing the seals and flushing the hub restored quiet operation.
Diagnostic Steps and Inspection Tips
To diagnose hub noise effectively:

• Park the machine on level ground and engage the parking brake
  
• Remove the hub fill plug and inspect oil condition and level
  
• Rotate the track manually and listen for grinding or resistance
  
• Check for metal shavings or discoloration in drained oil
  
• Inspect sprocket bolts and hub flange for looseness or wear
  
• Use a stethoscope or mechanic’s probe to isolate sound origin
  

If the hub oil is dark, gritty, or smells burnt, internal damage is likely. A teardown may be necessary to inspect bearings, gear teeth, and seal surfaces.
Repair Procedures and Preventive Measures
If hub components are worn or damaged, replacement parts are available through ASV dealers or aftermarket suppliers. The repair process involves:

• Draining hub oil and removing the sprocket
  
• Unbolting the hub cover and extracting the planetary assembly
  
• Cleaning all components and inspecting for wear
  
• Replacing bearings, seals, and gaskets as needed
  
• Refilling with SAE 80W-90 gear oil or manufacturer-recommended fluid
  

Preventive tips:

• Check hub oil every 100 hours
  
• Replace oil every 500 hours or annually
  
• Avoid pressure washing near hub seals
  
• Use synthetic gear oil in extreme climates
  
• Torque sprocket bolts to spec and inspect monthly
  

One operator in Manitoba added magnetic drain plugs to his RC-60 hubs, allowing early detection of metal wear. This simple upgrade helped him avoid a costly bearing failure during peak season.
Design Evolution and Market Impact
ASV’s hub design has evolved over time, with newer models like the RT-65 and VT-70 featuring improved sealing and modular final drives. The RC-60 remains a respected machine in the field, with many units still operating after 5,000+ hours.
In 2006, ASV was acquired by Terex, expanding its global reach. Later, ASV returned to independent branding and now operates under Yanmar Compact Equipment North America. Despite corporate shifts, the RC-series legacy continues through loyal operators and robust aftermarket support.
Conclusion
Hub noise in the ASV RC-60 is a warning sign that should never be ignored. Whether caused by oil degradation, bearing wear, or gear damage, early diagnosis and proper maintenance can prevent downtime and extend machine life. With its unique undercarriage and proven drivetrain, the RC-60 remains a valuable asset—provided its hubs stay quiet, sealed, and well-lubricated.