1. Maintain Proper Track Tension: Excessive tension causes the idler wheel spring tension to act on the track pins and bushings, subjecting the outer diameter of the pins and the inner diameter of the bushings to constant high compressive stress. This leads to premature wear of the pins and bushings during operation. Simultaneously, the elasticity of the idler wheel tension spring also acts on the idler wheel shaft and bushing, generating significant surface contact stress. This makes the idler wheel bushing prone to wear into a semi-circle, the track pitch prone to elongation, and reduces mechanical transmission efficiency, wasting power transmitted from the engine to the drive wheels and tracks.

2. Ensure Idler Wheel Alignment: Misalignment of the idler wheels severely affects other components of the traveling mechanism. Therefore, adjusting the clearance between the idler wheel guide plate and the track frame is crucial for extending the life of the traveling mechanism. Adjustments are made using shims between the guide plate and the bearing. If the clearance is too large, remove the shims; if the clearance is too small, add shims. The standard clearance is 0.5–1.0 mm, with a maximum permissible clearance of 3.0 mm. 3. Tighten bolts and nuts promptly. Loose bolts in the traveling mechanism can easily break or be lost, causing a series of malfunctions. Routine maintenance should check the following bolts: track roller and carrier roller mounting bolts, drive wheel sprocket mounting bolts, track shoe mounting bolts, track roller guard plate mounting bolts, and diagonal brace head mounting bolts.

4. Lubricate the traveling mechanism promptly. Lubrication is crucial. Many track roller bearings “burn out” and become unusable due to undetected oil leaks. Oil leaks are generally considered to occur at the following five points: 1) Due to a faulty or damaged O-ring between the retaining ring and the shaft, oil leaks from the outside of the retaining ring to the shaft; 2) Due to poor contact of the floating seal ring or a defective O-ring, oil leaks from the outside of the retaining ring to the support roller; 3) Due to a faulty O-ring between the support roller and the bushing, oil leaks from the bushing to the roller; 4) Due to a loose oil filler plug or damage to the seat hole of the tapered plug seal, oil leaks at the oil filler plug; 5) Due to a faulty O-ring, oil leaks from the cover to the roller. Therefore, these areas should be regularly inspected, and lubrication should be added or replaced periodically according to the designated lubrication cycle for each part.

5. Crack Inspection and Maintenance: Cracks in the bulldozer’s traveling mechanism should be inspected promptly and repaired by welding or reinforcement as needed.