Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Why Did the Hydraulic Motor Fail on a Bobcat FRC200XT After Just 50 Hours
#1
Why Did the Hydraulic Motor Fail on a Bobcat FRC200XT After Just 50 Hours
The Bobcat FRC200XT and Its Role in Forestry Work
The Bobcat FRC200XT forestry cutter is a high-performance mulching attachment designed for skid steers and compact track loaders. Engineered to clear brush, small trees, and undergrowth, it features a heavy-duty drum with replaceable teeth and a high-flow hydraulic motor. When paired with machines like the Bobcat T86, it transforms into a land-clearing powerhouse. Bobcat, founded in 1947 in North Dakota, has become synonymous with compact equipment innovation, and the FRC200XT reflects their push into specialized vegetation management.
The FRC200XT is built for rugged use, but its hydraulic motor is a precision component that depends on clean fluid, stable pressure, and proper cooling. A failure at just 50 hours suggests a deeper issue—either in installation, maintenance, or system compatibility.
Terminology Notes
  • Hydraulic Motor: Converts hydraulic pressure into rotational force to drive the cutter drum.
  • Case Drain Line: A low-pressure return line that relieves internal leakage from the motor housing.
  • High-Flow Circuit: A hydraulic configuration delivering greater volume and pressure, required for heavy-duty attachments.
  • Cavitation: Formation of vapor bubbles in hydraulic fluid due to pressure drop, which can damage motor internals.
Failure Symptoms and Initial Observations
After only 50 hours of use, the hydraulic motor on the FRC200XT began leaking heavily. The leak was described as severe, suggesting either a seal blowout or internal housing damage. The machine was a Bobcat T86, which supports high-flow hydraulics and is compatible with the FRC200XT.
Key clues:
  • The leak occurred early in the attachment’s life
  • No mention of impact damage or external trauma
  • The motor was likely factory-installed or part of a dealer package
Possible Causes and Diagnostic Strategy
Early hydraulic motor failure typically stems from one or more of the following:
  • Improper case drain routing: If the case drain line is blocked or misrouted, pressure builds inside the motor housing, blowing seals.
  • Contaminated hydraulic fluid: Metal shavings, water, or dirt can damage internal bearings and seals.
  • Incorrect hydraulic pressure: Excessive pressure or flow mismatch can overheat the motor or cause cavitation.
  • Manufacturing defect: Rare, but possible in early production runs or improperly torqued assemblies.
Recommended steps:
  • Inspect the case drain line for proper routing and flow
  • Check hydraulic fluid for contamination using a particle counter or visual inspection
  • Confirm pressure settings match motor specifications (typically 3,000–4,500 psi for high-flow systems)
  • Review installation records and torque specs on motor mounting bolts
Operator Anecdotes and Practical Advice
One forestry contractor recalled a similar issue with a different brand mulcher where the case drain line was mistakenly capped during installation. The motor failed within 20 hours, and the replacement was denied under warranty due to installation error.
Another technician emphasized that Bobcat’s high-flow attachments require precise hydraulic calibration. He recommended checking the pressure relief valve and ensuring the loader’s software recognizes the attachment type.
A dealer in Finland shared that early units of the FRC200XT had a batch of motors with improperly seated seals. Bobcat issued a service bulletin, but not all units were recalled.
Preventive Measures and Long-Term Solutions
  • Always verify case drain routing during installation
  • Flush hydraulic system before attaching new tools
  • Use OEM filters and fluid to maintain warranty and performance
  • Log operating hours and pressure readings for warranty support
  • Train operators on warm-up procedures to prevent cold-start damage
Conclusion
A hydraulic motor failure on the Bobcat FRC200XT after just 50 hours is a serious issue, often linked to installation errors or fluid contamination. While the attachment is built for extreme conditions, its motor relies on precise hydraulic management. By inspecting the case drain line, confirming pressure settings, and maintaining fluid quality, operators can prevent premature failure and keep the cutter running strong. In forestry work, power is nothing without control—and the motor is where that balance begins.
Reply


Messages In This Thread
Why Did the Hydraulic Motor Fail on a Bobcat FRC200XT After Just 50 Hours - by MikePhua - Yesterday, 08:13 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  Komatsu PC120-6 Hydraulic Power Loss After Warm-Up MikePhua 0 10 7 hours ago
Last Post: MikePhua
  Bobcat 753 Hydraulic Lockup and Troubleshooting Strategy MikePhua 0 11 7 hours ago
Last Post: MikePhua
  Hitachi EX120-2 Hydraulic Conversion Kit Installation MikePhua 0 10 7 hours ago
Last Post: MikePhua
  Bobcat T770 Tilt Circuit Drift and Valve Troubleshooting MikePhua 0 12 7 hours ago
Last Post: MikePhua
  Bobcat T190 Cab Heater System: Troubleshooting and Maintenance MikePhua 0 12 7 hours ago
Last Post: MikePhua
  Hydraulic Issues in Caterpillar D5N Track-Type Tractors MikePhua 0 7 8 hours ago
Last Post: MikePhua
  T320 Lift Cylinder Bleed Off and Hydraulic Troubleshooting MikePhua 0 9 8 hours ago
Last Post: MikePhua
  Hydraulic System Issues in New Holland Equipment MikePhua 0 5 8 hours ago
Last Post: MikePhua
  Bobcat 863F Hydraulic Leaks: Common Causes and Solutions MikePhua 0 8 8 hours ago
Last Post: MikePhua
  Bobcat 331 Slew Not Holding: Troubleshooting Hydraulic Issues MikePhua 0 8 8 hours ago
Last Post: MikePhua
  Why Is the Hitachi EX120-3 Having Hydraulic Trouble MikePhua 0 5 8 hours ago
Last Post: MikePhua
  Bobcat 753 Common Problems and Troubleshooting MikePhua 0 2 Yesterday, 08:05 PM
Last Post: MikePhua
  Kobelco Error Codes: Understanding and Troubleshooting Hydraulic Excavator Issues MikePhua 0 4 Yesterday, 08:01 PM
Last Post: MikePhua
  Why Is Hydraulic Power Low on a Kubota U55-4 MikePhua 0 7 Yesterday, 07:55 PM
Last Post: MikePhua
  Diagnosing Hydraulic Failure on the CAT 951C Track Loader MikePhua 0 6 Yesterday, 07:53 PM
Last Post: MikePhua

Forum Jump:


Users browsing this thread: 1 Guest(s)