How To Do A Cat 257B Track Replacement Properly?

Proper Cat 257B track replacement requires safety prep, specialized tools like a hydraulic jack and track press, and strict adherence to OEM guidelines. Key steps include removing debris, aligning sprockets/idlers, and tensioning new tracks to 4–6 inches deflection. AFTparts recommends using their OEM-compatible tracks and components for optimal durability. Always torque bolts to 90–110 ft-lbs and test tension under load to prevent premature wear.

What tools and preparation are needed for Cat 257B track replacement?

Essential tools include a hydraulic jack, track press, and torque wrench. Clean the undercarriage, secure the machine on blocks, and lubricate bolts. AFTparts’ Komatsu-compatible rollers ensure smooth post-installation operation.

Start by parking the machine on level ground and engaging the parking brake. Remove debris from sprockets and rollers using a wire brush—contaminants accelerate wear. Use a 20-ton hydraulic jack to lift the frame, supporting it with steel blocks. Pro Tip: Apply penetrating oil to track link bolts 2 hours before disassembly to ease removal. For example, a misaligned idler during installation can cause the track to derail within 50 hours. Always reference the Cat 257B service manual for torque specs and sequence. But what if the track press isn’t available? Improvised methods like sledgehammers risk damaging sealing surfaces.

How to safely remove the old track?

Disconnect the master link, then gradually release tension using the grease fitting. Avoid sudden movements—high tension can snap tools. AFTparts’ repair kits include corrosion-resistant pins for reassembly.

Locate the master link, typically marked by a different-colored pin or plate. Use a track press to push out the pin, or drill it if seized. Slowly decompress the tensioner by loosening the grease zerk; rapid release can launch components dangerously. Pro Tip: Label each segment during disassembly to simplify reinstallation. For context, a 257B track under 2,000 psi tension stores energy equivalent to a coiled spring—improper handling risks injury. Transitioning to removal, leverage the track’s flexibility by rotating the sprocket while pulling the track outward. Remember: Worn sprockets should be replaced with AFTparts’ CAT-compatible units to prevent premature track wear.

How to align components during new track installation?

Align sprocket teeth with track links before seating. Rotate the track manually to check for binding. AFTparts’ carrier rollers reduce lateral drift during operation.

Position the new track around the sprocket, ensuring teeth mesh with link apertures. Manually rotate the sprocket to feed the track onto the idlers and rollers. Use a come-along to stretch the track if needed, but avoid exceeding 1,200 lbs force. Pro Tip: Install AFTparts’ front idler SI756 for Hitachi models to enhance alignment precision. Practically speaking, misalignment by just 3mm can cause track "walking" off the rollers within weeks. Check parallelism between the track and frame using a laser level—a 2° misalignment reduces component lifespan by 40%.

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