Check the crankshaft as follows:
1. Put the crankshaft on the V-shaped iron, and measure
the large side clearance of the connecting rod with the
thickness gauge. The limit value of maintenance:
0.4mm;
2. Use dial indicator to measure the runout of crankshaft
diameter. Actual runout of the crankshaft
Maintenance limit value: 0.1mm;
3. Measure the radial gap between the two points in the
X and Y direction of the big head of the connecting rod.
Maintenance limit value: 0.015mm;
Left and right crankshaft box bearing inspection
Check the left and right crankshaft box bearings as
follows:
1. Check whether all bearings of the left and right boxes
rotate flexibly; If the rotation is not flexible or there is a
hairpin phenomenon, the bearing of the same type
should be replaced;
2. Take down the left and right boxes of the crankshaft
bearing to check its diameter jump and end jump, if
there is noise or diameter jump and end jump, it should
be replaced with a new crankshaft bearing;
3. Check whether the oil channels of the left and right
containers are smooth.
Check shift fork, fork shaft and shift drum
Check the shift fork, fork shaft and speed drum as
follows:
1. Check whether the shift fork is worn, bent or any
other fault, and measure the inside diameter of the shift
fork;
Fork maintenance limit value: φ 34.031mm
2. Measure the thickness of the fork;
Maintenance limit value: 4.5mm
3. Check the surface and groove of the gear drum for
wear or damage.
Check the combination of main and auxiliary
shafts
