|
|
AEM026 4. Measure outer diameter “Dm” of each crankshaft main journal. 5. Calculate main bearing clearance. Main bearing clearance = A − Dm Standard: 0.004 - 0.022 mm (0.0002 - 0.0009 in) If it exceeds the limit, replace bearing. I If clearance cannot be adjusted within the standard of any SEM964 I When grinding crankshaft journal, confirm that “L” dimen- “L”: 0.05 mm (0.0020 in) I Refer to SDS, EM-77 for grinding crankshaft and available SEM313D I If crankshaft is replaced, select thickness of main bearings as a. Grade number of each cylinder block main journal is punched SEM013D SEM203D b. Grade number of each crankshaft main journal is punched on c. Select main bearing with suitable thickness according to the How to Select Main Bearings NCEM0026S0803 (Identification mark and color) Crankshaft Cylinder block main journal grade number 0 1 2 3 0 0 (A, Black) 1 (B, Brown) 2 (C, Green) 3 (D, Yellow) 1 1 (B, Brown) 2 (C, Green) 3 (D, Yellow) 4 (E, Blue) 2 2 (C, Green) 3 (D, Yellow) 4 (E, Blue) 5 (F, Pink) 3 3 (D, Yellow) 4 (E, Blue) 5 (F, Pink) 6 (G, No color) For example: Cylinder block main journal grade number: 1 GI MA LC EC FE CL MT AT AX SU BR ST RS BT HA SC EL IDX CYLINDER BLOCK Inspection (Cont’d) EM-61 |