Tham khảo tài liệu 'cummins engine shop manual part 14', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | REPLACING CROSSHEAD GUIDES GRINDING AND CORRECTING VALVES REPLACING ROCKER LEVER BUSHING REPAIR AND REPLACEMENT REPLACING CROSSHEAD GUIDES GRINDING AND CORRECTING VALVES Special tools Part Number Part Name Q ty A 795-130-3300 Crosshead guide puller 1 B 795-140-1800 Crosshead guide driver 1 1. Removing crosshead guides Using crosshead guide puller A remove the crosshead guide. 1 Hold the crosshead guide with collet 5 on the puller as shown in the drawing. 2 Tighten the collet with bolt D and lock sleeve 2 . 3 Turn nut 3 and pull out the crosshead guide. 4 Remove burrs from the crosshead guide mount and clean the part. 2. Press-fitting crosshead guides 1 Fit the crosshead guide to the cylinder head and set crosshead guide driver B in position. 2 Press-fit the crosshead guide until the tip of the driver comes into contact with the cylinder head. Protrusion of crosshead guide Tolerance mm Special tool Part Number Part Name Q ty A Commercially available Valve refacer 1 1. Grinding the seat face Grind the seat face with valve refacer A. Valve seat angle 30 2. Checking after grinding Measure the thickness of the valve head and the contact width of the valve seat face and confirm that the measurements are within the ranges of the standard values. Thickness of valve head Repair limit mm Contact width of valve Standard width mm REPLACING ROCKER LEVER BUSHING Special tool Part Number Part Name Q ty A 795-130-3100 Mandrel set 1 1. Extract the bushing with the rocker lever mandrel set. 2. Remove burrs and foreign matter from the bushing hole. 3. Press-fit the bushing with the mandrel set. Align two oil holes. Note however that the oil hole on the crosshead side is blinded for the intake valve. 0 139 Inside diameter of bushing z 2mm N855 SERIES 15-013 GRINDING AND CORRECTING TOP FACE OF CYLINDER BLOCK REPAIR AND REPLACEMENT CYLINDER BLOCK GRINDING AND CORRECTING TOP FACE OF CYLINDER BLOCK 1. Grinding Grind the top face of cylinder block to .
