80
Crankshaft runout limit: 0.04mm
Crank pin oil clearance
1. Place a plastic clearance gauge on the crank pin and make it parallel to the crankshaft.
2. Fit the connecting rod and bearing bush on the crank pin.
3. Tighten the connecting rod bolts according to the specified torque.
Seating torque: 13 Nm for the first time
35 Nm for the second time
4. Remove the connecting rod and measure the compressed width of the plastic clearance
gauge; If it exceeds the specified value, replace the connecting rod bearing bush.
Oil clearance: 0.017～0.040mm
Note:
Do not turn the connecting rod until the measurement is completed.
Selection of connecting rod bearing bush
Select the appropriate connecting rod bearing bush according to the group number on the
connecting rod and crankshaft.
One side of the big end of the connecting rod is engraved with the pairing number of the
connecting rod, and the other side is divided into three groups 1, 2 and 3 according to the
inner diameter of the big end hole from small to large.
The group number of crank pins of crankshaft is engraved on the first fan plate of
crankshaft, and it is divided into three groups 1, 2 and 3 according to the diameter from large to small.
曲柄销分组标识(4位）
Examples of pairing:
If the group numbers of connecting rod and crank pin are the same, then 1. select the
blue-marked bearing bush, 2. select the green-marked bearing bush, and 3. select the
red-marked bearing bush. If the group numbers of corresponding positions of the connecting
rod and crank pin are different, the bearing bush is selected according to the larger number;
For example, if the group numbers of the two are 1 and 3 respectively, the red-marked
bearing bush will be selected according to 3.
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