650K - DOZER, CRAWLER 0134 Recoil System (Idler & Idler Spring) Track Chain Tension Adjuster Check Valve For full view, you need register Parts on group Track Chain Tension Adjuster Check Valve: Pos. Part No Qty Parts name Comments 1. AT181966 [1] Pressure Relief Valve BRASS WITH PART NUMBER MARKED 2. JD7797 [1] Lubrication Fitting