Attention! The balancing block cannot be dismantled, as it has a high manufacturing accuracy.
Turn the crankshaft clockwise and set the piston of the first cylinder to the TDC position.
Install the shim on the mounting surface of the balancing block.
Pic. 2.177. Balancing block marks
Install the balancing block on the cylinder block, after setting the marks of the balancing block at the top in the center (pic. 2.177).
Pic. 2.178. Turning the balance shaft with a screwdriver
Insert a screwdriver into the crankshaft in the area of the first counterweight, rotate and apply axial force to the crankshaft with a screwdriver, acting as a lever, as shown in Figure 2.178.
Pic. 2.179. Measuring the backlash in the gearing of the driven gear shaft
Establish the special adaptation, as it is shown in drawing 2.179, then measure a backlash in gearing, using the indicator of hour type.
If the clearance exceeds the specified value, measure it again and use the shim selection chart to select the appropriate shim according to the following procedure.
Attention! When measuring the clearance, turn the crankshaft one full revolution and check that the clearance is correct in the following six positions: 10°, 30°, 100°, 190°, 210°, 280°after TDC.
The gap in the gearing: 0.005–0.101 mm.
Using the main shim (number 50), install the balancing block on the cylinder block, and then measure the clearance.
Select the shim according to the measurement result.
Install the selected shim to the balancing block, then install the balancing block to the cylinder block.