Optimizing Track Tension on the Caterpillar 277B Multi-Terrain Loader

[MikePhua]

Maintaining proper track tension on the Caterpillar 277B Multi-Terrain Loader is crucial for ensuring optimal performance, extending the lifespan of undercarriage components, and preventing unnecessary wear. Over time, operators may encounter situations where standard adjustment procedures no longer suffice, necessitating additional measures to achieve the desired track tension.
Understanding Track Tension
Track tension refers to the amount of slack or tightness in the rubber tracks of the machine. Proper tension ensures that the tracks remain securely engaged with the drive sprockets and idlers, preventing issues such as track derailment or excessive wear. Both over-tightening and under-tightening can lead to premature component failure and reduced machine efficiency.
Standard Track Adjustment Procedure
Under normal circumstances, adjusting the track tension on the 277B involves the following steps:

1. Positioning the Machine: Place the loader on firm, level ground and ensure that the tracks are not under load.
   
2. Measuring Track Sag: Place a 45 kg (100 lb) weight between the drive sprocket and the idlers. Using a straight edge, measure the distance from the bottom of the straight edge to the top of the track. The recommended track sag is approximately 12 mm (0.5 inches).
   
3. Adjusting Track Tension: If the track sag deviates from the recommended value, use the track tensioning tool to adjust the position of the idlers. This may involve loosening bolts, repositioning the idlers, and retightening bolts to secure the new position.
   

Addressing Insufficient Track Adjustment
In cases where standard adjustment procedures no longer provide adequate track tension, operators have reported utilizing additional measures to achieve the desired tension. For instance, some have installed plates on the jockey wheel hangers to lift the jockey wheels by approximately two inches, allowing for additional adjustment and increased clearance underneath the jockey wheels.
Additional Considerations

• Regular Inspections: Frequent checks of track tension and undercarriage components can help identify issues early and prevent costly repairs.
  
• Proper Lubrication: Ensuring that all grease fittings are properly lubricated can reduce friction and wear on undercarriage components.
  
• Manufacturer's Guidelines: Always refer to the Caterpillar Operation and Maintenance Manual for specific instructions and torque specifications related to track adjustment.
  

Conclusion
Maintaining proper track tension on the Caterpillar 277B Multi-Terrain Loader is essential for optimal performance and longevity of the machine. By following standard adjustment procedures and implementing additional measures when necessary, operators can ensure that their equipment remains in peak operating condition. Regular maintenance and adherence to manufacturer guidelines are key to preventing issues and maximizing the lifespan of undercarriage components.