Man D2862 LE221, Руководство по ремонту

Страница: 333 / 420

CRANK MECHANISM
Installing the connecting rod bearing cap
WARNING
Crack surfaces are sensitive.
The
principle involved can cause chipping
• Exchange the connecting rod if the
crack surfaces are damaged
• Protect crack surfaces against damage
caused by hard and sharp objects
• Insert the connecting rod bearing shell (3) into
the corresponding connecting rod bearing cap (2)
according to the marking and pairing; position
using the
Setting tool [144] if necessary
• Fit the connecting rod bearing cap (2) with
inserted connecting rod bearing shell (3) onto
the connecting rod as marked, taking care
not to damage the contact surfaces between
the connecting rod bearing shell (3) and the
connecting rod
• Screw in the new connecting rod bearing bolts (1)
and tighten them by hand
Tightening the connecting rod bearing shells
• Turn the crankshaft to BDC to tighten the
connecting rod bearing bolts (1)
• Check the alignment of the connecting rod
bearings. If necessary, remove the connecting
rod bearing shells and reposition the connecting
rod bearings with
Setting tool [144] , then ret the
connecting rod bearings
• Tighten the connecting rod bearing bolts (1) to
Initial torque 100 Nm
• Tighten the connecting rod bearing bolts (1) to
Final tightening 90°
Measuring the piston standout
• Set the piston (2) to top dead centre
• Put the
Dial gauge [142] (3) on the crankcase (1)
with the Dial gauge holder [140] (4)
• Locate the dial gauge tip (5) on the crankcase (1)
and zero the Dial gauge [142] (3)
• Locate the dial gauge tip (5) on the piston (2) and
read off the difference
The permitted piston standout is -0.361 to
+0.080 mm .
AE6 3st edition 331