12. OPERATION 12.16.2 INSPECTION AND ADJUSTMENT l Properly adjust track tension. Tension should be measured at clearance @ shown in the diagram - usually 20 to 30 mm (0.8 to 1.2 in) at this point. For rocky terrain, tighten tracks slightly. In clay or sandy areas, slightly loosen them. (For inspection and adjustment proce- dures, refer to “24.2 WHEN REQUIRED”.) Clearance @ l Check idler rollers for oil leakage as well as for loose bolts and nuts. If any trouble is detected, repair immediately. l Check the clearance between the idler guide plate and the track frame. If clearance @ increases, idler may develop side motion and tracks may come off.
(For inspection and adjustment proce- dures, refer to “24.2 WHEN REQUIRED”.) 12.16.3 INSPECTION AND REPAIR Frequent inspection and prompt repair will reduce repair costs. The following items for inspection will serve as a guide to mainte- nance service of each undercarriage part. Perform periodical inspec- tion and contact the Komatsu distributor in your area when machine has approached repairable limits and reversing limits. Measuring link pitch 1. Insert a wooden block between track shoe and sprocket to take up the slack in track shoes. 2. Measure pitch length of 4 links in stretched portion at more than 2 links away from master pin. Of length obtained, l/4 is the link pitch.
Standard link pitch: 175.25 mm (6.9 in) Reversing limit link pitch: 178.25 mm (7.0 in) A center hole is provided on both ends of master pin. \ c L Master pin AE077860 2-41