11. Crank Mechanism:
Crankshaft, Connecting Rod, Piston
11.1
Counterbalancing of crankshaft
11.1.1 General
The crankshaft is counterbalanced by means of weights on the crank
webs. The V-engines have counterweights on all webs.
11.1.2 Counterbalancing of 18-cylinder V-engines
The counterbalancing of the free moment of the 18-cylinder V- engines
is accomplished by means of a supplementary weight at the free end of
the engine and a specially balanced flywheel. After a possible removal,
it is important that the supplementary weight is correctly re-installed,
Fig 11-1.
Supplementary weight for 18V34
10˚
Crank web for cylinder A1 *
and B1 is straight upwards
Centerline of
counter weight
Seen from
free end
* For a clockwise rotating engine:
Crankshaft is turned to 25˚ after TDC for cylinder A1
For a counter-clockwise rotating engine:
Crankshaft is turned to 25˚ before TDC for cylinder A1
Fig 11-1
3211559045
200414-05
Crank Mechanism: Crankshaft, Connecting Rod, Piston
34SG/32DF
