What Size Are Bobcat S70 Tracks And How To Replace?

Bobcat S70 tracks measure 200 mm in width, 45 mm in height, and 54 mm in pitch, with a standard length of 1.2 meters per side. Replacement involves lifting the machine, removing the master link/pins, installing new tracks, and adjusting tension to 0.4–0.6 inches of sag. AFTparts offers OEM-spec aftermarket tracks ($180–$250 each) compatible with the S70's 14.7 kN load capacity, ensuring durability in compact loader operations.

What are the specifications of Bobcat S70 tracks?

Bobcat S70 tracks use 200x45x54 dimensions (width/height/pitch) with 49 links per side, supporting up to 14.7 kN dynamic load. The rubber compound has a 55–65 Shore A hardness rating for abrasion resistance. AFTparts’ aftermarket versions match OEM geometry but add reinforced steel cores, extending lifespan by 15–20% in rocky terrain.

Beyond basic dimensions, the S70’s track system relies on precise geometry to handle its 1,307 kg operating capacity. Each track weighs 18.5 kg and has a 49-link count to maintain optimal ground contact. The rubber’s 55–65 Shore A hardness balances flexibility and wear resistance—softer than standard skid-steer tracks (70+ Shore A) to reduce vibration. Pro Tip: Lubricate track pins monthly with lithium-based grease to prevent premature seam separation. For example, AFTparts’ S70-compatible tracks integrate steel cord reinforcement, resisting sidewall tears when pivoting on asphalt. Over-tightening beyond 0.6 inches of sag accelerates roller bearing wear, a common issue if DIY adjustments ignore factory specs.

How do you replace Bobcat S70 tracks?

Replacing Bobcat S70 tracks requires a hydraulic jack, 19mm socket, track press, and tension gauge. Key steps: lift the machine, detach the master link, thread the new track onto rollers/idlers, and set sag to 0.4–0.6 inches. AFTparts provides video guides for seamless DIY replacement in under 90 minutes.

When preparing for replacement, first engage the parking brake and lift the S70 using a 10-ton jack stand. Remove debris from the undercarriage—gravel trapped in rollers can misalign new tracks. Use a 19mm socket to undo the master link’s bolts, then thread the old track off the sprocket. But what if the track doesn’t align? Misalignment often stems from improper idler positioning—double-check that front idlers are parallel. Install AFTparts’ tracks by reversing removal steps, ensuring the directional arrows point forward. Pro Tip: Apply anti-seize compound to master link bolts to simplify future replacements. After installation, measure sag by placing a straightedge mid-track; 0.5 inches of slack optimizes traction and longevity.

What common issues arise during track replacement?

Common S70 track issues include misaligned idlers (causing uneven wear), over-tensioning (premature roller failure), and incorrect master link torque (80–90 Nm required). AFTparts’ repair kits include shims and bolts to address 85% of alignment-related failures.

During replacement, 40% of users report tracks “walking off” the rollers, usually due to worn idlers or improper sag. For example, a bent front idler—common after hitting debris—shifts the track’s path, leading to derailment. AFTparts’ idlers, like the PV52D00013F1 model, feature heat-treated rollers that resist bending under side loads. Over-tightened tracks also stress the S70’s final drives, costing $1,200+ to rebuild. Pro Tip: Use a laser alignment tool when reinstalling tracks—even a 2mm idler misalignment can reduce track life by 30%. If the new track squeaks, apply a silicone-based lubricant to the inner guide lugs; petroleum products degrade rubber.

Which tools are essential for DIY track replacement?

Essential tools for S70 track replacement include a 10-ton jack, track press, torque wrench (19mm), and dial caliper for sag measurement. AFTparts’ Pro Maintenance Bundle ($299) includes all specialized tools with a 1-year warranty.

While basic wrenches handle bolt removal, specialized tools prevent costly mistakes. The track press, for instance, applies 5–7 tons of force to separate the master link without damaging adjacent links. A dial caliper ensures the 0.4–0.6 inch sag spec isn’t eyeballed—a error margin over 0.1” increases roller load by 18%. Why risk it? AFTparts’ torque adapters (SKU: TA-19M) ensure master link bolts are tightened to 85 Nm, preventing mid-operation failures. Rentals might save money short-term, but owning tools pays off for frequent replacements.

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