3. SWING DEVICE WEARING PARTS 1) SLIDING PARTS 2) 6-22 Inspection item Standard dimension Recommended replacement value Counter measures Clearance between piston and cylinder block bore 0.020 0.045 Replace piston or cylinder block Play between piston and shoe caulking section (儑) 0 0.3 Replace assembly of piston and shoe Thickness of shoe (t) 4 3.8 Replace assembly of piston and shoe Combined height of set plate and guide (H) 17.4 17 Replace set of set plate and guide Thickness of friction plate 3.6 3.2 Replace 儑 t H Part name Standard roughness Remark Shoe 0.8S Shoe plate 0.8S Cylinder 0.8S Valve plate 0.8S