Takeuchi TL130 Two-Speed Solenoid Issue and Machine Overview

[MikePhua]

The Takeuchi TL130 is a versatile compact track loader valued for its combination of power, maneuverability, and precision control. Widely used in construction, landscaping, and agriculture, the TL130 comes with a two-speed transmission controlled by solenoids, enhancing operational efficiency by allowing operators to switch between high and low travel speeds.
Machine Specifications

• Engine: Yanmar 4TNV98, producing 49.2 kW (approximately 67 hp) at 2450 rpm.
  
• Operating Weight: About 3,400 kg (7,497 lbs).
  
• Travel Speeds: Two speeds, typically 6.3 mph high and 4.4 mph low.
  
• Hydraulic System: Operating pressure around 20.6 MPa with auxiliary hydraulic flow of approximately 68 liters/min.
  
• Bucket Breakout Force: Approximately 29.9 kN.
  
• Dimensions: Width roughly 1.58 m, height 2.23 m, length 3.43 m with bucket attached.
  
• Features tilt-back operator compartment for ease of maintenance access.
  

Two-Speed Solenoid Function

• The two-speed solenoid controls hydraulic pathways enabling the loader to switch between low and high travel ranges.
  
• When activated, the solenoid shifts the transmission components to achieve higher speed trips and better fuel efficiency during transport tasks.
  
• It needs reliable power supply and a control signal from the operator’s controls or the machine’s electronic system.
  

Common Issues with Two-Speed Solenoid

• The solenoid may fail due to coil burnout, wiring corrosion, or switch failures leading to an inability to shift speeds.
  
• Symptoms include the machine being stuck in one speed range, slow travel, or erratic shifting.
  
• Electrical problems such as poor connectors, worn wiring insulation, or control circuit faults can compromise solenoid operation.
  
• Hydraulic system issues like contamination or pressure irregularities may affect the actuator’s ability to respond.
  

Troubleshooting and Solutions

• Check all electrical connections at the solenoid, ensuring corrosion-free contacts and firm mechanical connections.
  
• Use a multimeter to verify coil resistance and apply direct voltage to test solenoid functionality.
  
• Inspect solenoid wiring harness for continuity and damage.
  
• Flush or replace hydraulic fluid and filters to resolve hydraulic-related shifting difficulties.
  
• Review operator control switches for wear or malfunction.
  
• Replace faulty solenoids with OEM parts to assure compatibility and durability.
  

Maintenance Tips

• Regularly inspect wiring harnesses and connectors in vibration-prone areas.
  
• Include solenoid diagnostics in routine electrical system checks.
  
• Ensure hydraulic fluid cleanliness to maintain smooth transmission operation.
  
• Follow manufacturer’s service intervals for hydraulic system and transmission components.
  

Terminology

• Solenoid: Electromagnetic device that actuates mechanical components when energized.
  
• Two-Speed Transmission: Transmission offering two gear ratios for different speed ranges.
  
• Breakout Force: The maximum force a loader bucket applies when digging or prying.
  
• Hydraulic Flow: Volume of hydraulic fluid moving per minute, measured in liters or gallons.
  
• Coil Resistance: Electrical resistance of solenoid coil; used to diagnose coil health.
  

Small Story
An operator reported that his Takeuchi TL130 would not shift into high gear, making transport across the site laborious and slow. Upon inspection, the technician found the two-speed solenoid coil burnt out due to prolonged moisture exposure from a damaged seal. After replacement and sealing the enclosure, the loader regained full speed functionality, improving site productivity and operator satisfaction.
Summary List

• Two-speed solenoid controls transmission shifting in Takeuchi TL130 skid steer.
  
• Failure symptoms include stuck low speed or erratic shifting.
  
• Electrical tests include coil resistance and direct voltage application.
  
• Maintain hydraulic fluid cleanliness and check wiring regularly.
  
• Use OEM parts for replacements to maintain system reliability.
  
• Prevent moisture ingress into solenoid enclosures.
  
• Include solenoid check in routine machine inspections.
  

The two-speed solenoid is a vital component of the Takeuchi TL130’s performance, facilitating efficient operation. Awareness of common issues, diagnostic methods, and preventive care ensures the loader maintains optimal travel control and user productivity.