Track Adjuster Recoil Springs are the most critical and hardest working components of a tractor undercarriage system. The recoil springs are the shock absorbers that protect the undercarriage from impacts and overload. The recoil springs prevent premature wear and extends the life of the track and idler systems. For this reason, CTP guarantees that our recoil springs will provide shock absorbance at all times, in all extreme working conditions!