UNDERCARRIAGE / Travel Device MAINTENANCE STANDARD 1. Clearance between inner diameter of cylinder block and outer diameter of piston: Cylinder Block (D-d): 0.06 mm (0.002 in) or less d D W507-02-04-009 Piston 2. Clearance between piston and shoe engaging: Piston δ : 0.4 mm (0.016 in) or less Shoe δ 3. Clearance between inner diameter and outer di- ameter at the mounting position of case and pis- ton: W107-02-06-140 (D-d): 0.03 mm (0.001 in) or less Case 4. Wear amount on the sliding surfaces of cylinder block and valve plate: Check there is no abnormal scratch, wear or score. Damage and wear amount within 0.02 mm (0.001 in) or less. W162-03-02-005 W3-2-48 Piston D D