Kubota ZD221-48 Workshop Manual page 110

ZD221, WSM
ENGINE
Crankshaft Assembly
1. Remove the main bearing case screw 2 (1).
2. Turn the crankshaft to set the crank pin of the third cylinder to the
bottom dead center. Then draw out the crankshaft until the crank
pin of the second cylinder comes to the center of the third
cylinder.
3. Turn the crankshaft by 2.09 rad. (120°) counterclockwise to set
the crank pin of the second cylinder to the bottom dead center.
Draw out the crankshaft until the crank pin of the first cylinder
comes to the center of the third cylinder.
4. Repeat the above steps to draw out all the crankshafts.
(When reassembling)
• Clean the oil passage of the crankshaft with compressed air.
• Install the crankshaft assembly, aligning the screw hole of main
bearing case screw 2 with the screw hole of crankcase.
• When tightening the main bearing case 2, apply oil to the main
bearing case screw 2 and screw by hand before tightening the
specific torque. If not smooth to screw by hand, align the screw
holes between the crankcase and the main bearing case.
27 to 30 N'm
Tightening torque Main bearing case screw 2 2.7 to 3.1 kgf·m
20 to 221bHt
(1) Main Bearing Case Screw 2
W1031360
1-838