Lombardini CHD series - Dynamic Balancer; Crankshaft for engines with dynamic equalizer (only four-cylinder engines); Dynamic balancer (on request) - Adjustment of clearance between teeth D and ring gear A

- 47 - Workshop Manual LDW CHD _ cod. 1.5302.345 - 6° ed_rev. 05
4
L
30.231÷00.231
M
90.231÷70.231
90
92
91
Ref.
Dimensions (mm)
Crankshaft for engines with dynamic equalizer (only four-
cylinder engines).
The crankshaft comes with seat for the control gear of the
counter-rotating shaft dynamic balancer.
Components:
1 Control gear for counter-rotating shafts
2 Seat for the control gear of counter-rotating shafts
To replace the gear heat it up to 180°÷200°C.
Locate it into its seat so that the timing reference marks on the
teetharefoundontheyweelside.
Disassembly / Reassembly
Dynamic balancer (on request) - Adjustment of clearance
between teeth D and ring gear A
Followgures91and92.
Screw the screw B into support C taking care to centre the hole
in the mass of the gear D to lock it.
Fit the mass assembly under the crankcase so that the tooth
with reference E goes between the teeth with references F.
Fix the mass assembly with the four M10 screws to the
crankcase, provisionally tightening it to 40 Nm.
Remove screw B.
By making the driving shaft turn, check the clearance between
the ring gear A and the gear of mass D; set a comparator with
the feeler on one tooth of the timing system control gear G; by
turning the driving shaft a little way check the clearance which
must be 0.026÷0.067.
If the clearance measured does not come within the values
given, repeat the operation placing the 0.05 mm shims provided
for adjustment between the support C and the crankcase.
When mounting the balancer, lubricate the bushings with
Molikote then couple the two masses, taking into account the
references H and I.
PermanentlyxthesupportC to the crankcase by tightening the
screws to 50 Nm plus one turn of the wrench clockwise through
45°.
The four screws will have to be mounted with a few drops of
Loctite 242.