Weichai America Corp.
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6.
Rotate the flywheel with external force until cylinder 1, 6 get to BDC, install thrust plates of
cylinder 1 and 6, and screw on connecting rod bolts. Rod parting surface should face left side
of cylinder block (i.e. engine oil cooler side). The numbered pistons should not be mixed,
install each piston to the corresponding cylinder; connecting rod cap and connecting rod
should be used in pairs, apply clean lubricating oil on connecting rod bolts before assembling.
7.
Tighten connecting rod bolts: Firstly tighten the bolts to 30Nm in symmetry, and then tighten
each bolts for another 58°~65°, in the meantime tighten torque should be up to 85~135Nm.
Assemble other piston-rods in the same way.
3.5.4 Inspection and maintenance of piston-rod assembly
1.
Check whether there is crack on combustor throat fillet and piston pin boss; Check piston
skirt and piston head for cylinder scoring phenomenon; Check wear condition of piston pin
hole.
2.
Check wear condition of piston ring outer edge; Check wear condition of piston ring upper
and lower end face.
3.
Check wear condition of piston pin external surface.
4.
Check whether there is crack on connecting rod tip bottom hole, connecting rod body and
connecting rod small end oil hole; Check alloy layer of connecting rod shell for abnormal
wear and peeling phenomenon; Check wear condition of connecting rod side faces, check
crooking condition of connecting rod body.
5.
Check wear condition of connecting rod bearing shell, check its alloy layer for discoloration,
peeling and slippage phenomenon.
3.6
Assembly and disassembly of torsional vibration damper Crankshaft belt pulley and Hub
3.6.1 Exploded view of Torsional vibration damper Crankshaft belt pulley and Hub
