Finding and Replacing Sprockets for Mustang Track Loaders

[MikePhua]

The Mustang Brand and Its Compact Track Loader Line
Mustang Manufacturing, founded in 1865, began as a producer of agricultural implements and evolved into a respected name in compact construction equipment. By the early 2000s, Mustang had expanded its lineup to include compact track loaders (CTLs), often built in collaboration with Takeuchi. These machines—such as the MTL16, MTL20, MTL25, MTL320, and MTL325—were known for their rugged undercarriages, powerful hydraulic systems, and operator-friendly controls. Mustang CTLs gained popularity across North America and Europe, especially in landscaping, utility trenching, and demolition work.
The undercarriage of these machines relies heavily on the integrity of the drive sprockets, which engage the track links and transmit torque from the final drive motors. When sprockets wear out or fail, traction suffers, track alignment deteriorates, and overall machine performance declines.
Terminology Notes

• Drive Sprocket: A toothed wheel that meshes with the track links to propel the machine forward or backward.
  
• Final Drive: The gear reduction system that delivers torque from the hydraulic motor to the sprocket.
  
• Bolt Circle Diameter (BCD): The diameter of the circle formed by the centers of the sprocket’s bolt holes.
  
• Tooth Count: The number of teeth on the sprocket, which must match the pitch of the track links.
  

Identifying the Correct Sprocket
Mustang CTLs often share undercarriage components with Takeuchi and Gehl machines. For example:

• The Mustang MTL16 uses a sprocket interchangeable with Takeuchi TL130 and Gehl CTL60
  
• The Mustang MTL320 and MTL325 use sprockets compatible with OEM part number 181147
  
• The Mustang MTL20 and MTL25 also match the same sprocket design used in several Takeuchi models
  

Sprockets typically feature:

• 16 teeth
  
• 9 bolt holes
  
• Internal diameter around 7-7/8 inches
  
• External diameter around 18-3/4 inches
  

These dimensions must be verified against the machine’s hub and track pitch to ensure proper fitment.
Sourcing Replacement Sprockets
Aftermarket suppliers such as Loader Parts Source, Rubbertrax, and Mytee Products offer forged steel sprockets designed to match OEM specifications. These sprockets are built from high-strength carbon steel (often 40Mn) and manufactured using forging processes to enhance durability and impact resistance.
Advantages of aftermarket sprockets include:

• Lower cost compared to dealership parts
  
• Availability for older or discontinued models
  
• Direct-to-door shipping
  
• Warranty coverage (often 12 months)
  

A contractor in Arizona reported switching to aftermarket sprockets for his MTL320 fleet and saw no difference in performance or longevity compared to OEM parts—while saving nearly 40% on replacement costs.
Installation Tips and Maintenance Advice
When installing new sprockets:

• Clean the hub surface and inspect for cracks or wear
  
• Torque bolts evenly and use thread locker to prevent loosening
  
• Align the sprocket with the track links before tensioning
  
• Check track tension and alignment after installation
  

It’s recommended to replace sprockets and rubber tracks simultaneously. Worn sprockets can accelerate track wear, and new tracks can prematurely wear against old sprockets. A rental yard in Michigan adopted this practice and extended undercarriage life across its CTL fleet by 30%.
Preventive Measures and Inspection Routine
To maximize sprocket life:

• Inspect teeth monthly for rounding or chipping
  
• Monitor bolt torque during scheduled maintenance
  
• Clean mud and debris from the undercarriage to prevent abrasive wear
  
• Rotate machines between high-traction and low-impact jobs to balance wear
  

Sprockets typically last between 1,000 and 3,000 operating hours depending on terrain, operator habits, and maintenance discipline. In rocky or abrasive environments, lifespan may be shorter.
Operator Anecdotes and Field Wisdom
A crew in British Columbia noticed their MTL25 losing traction on slopes. Upon inspection, they found the sprocket teeth had worn into a shark-fin profile, causing poor engagement with the track links. Replacing the sprockets restored climbing ability and reduced fuel consumption.
In Texas, a landscaper added a grease fitting to the sprocket hub to prevent corrosion and ease future removal. This small modification saved hours during the next replacement cycle.
Conclusion
Sourcing and replacing sprockets for Mustang track loaders is a critical part of undercarriage maintenance. With shared compatibility across Takeuchi and Gehl platforms, operators have access to a wide range of aftermarket options that match OEM performance. By understanding sprocket specifications, monitoring wear, and coordinating replacements with track changes, contractors can keep their machines running efficiently and avoid costly downtime. Whether on a muddy jobsite or a rocky slope, a well-maintained sprocket keeps the machine moving forward—literally and economically.