Check the oil pump
Check the oil pump as follows:
1. Check whether the internal and external rotors of the oil pump are worn and damaged. If the wear and damage
are serious, it is necessary to replace the new oil pump rotor assembly;
2. Check the oil pump gear rupture phenomenon, there is a need to replace the new oil pump gear;
3. Check whether the cover of the right oil pump is worn and damaged. If so, it is necessary to replace the cover of
the right oil pump.
Check shift mechanism
Check steps of the gear change mechanism are as
follows:
1. Check whether the roller of the variable speed drum
positioning
plate
rotates
flexibly,
whether the
positioning plate is bent, and whether the spring is
deformed;
2. Whether the big arm and forearm of the shift arm are
deformed, whether the spring is deformed, and whether
the shaft is bent.
Assembly of shift mechanism
Shift arm positioning shaft
The assembly steps of the gear shifting mechanism are
as follows:
1. Slide the shift arm into the left and right crankshaft
box hole, press down the shift arm assembly so that the
forearm is stuck into the shift drum baffle plate;
2. The positioning plate spring hook in the positioning
plate hanging groove hole and combination in place;
3. Move the big end roller of the positioning plate to the
positioning pin of the speed shifting drum and tighten it
in place;
4. There is slight clearance when the shift arm dial plate
is moved by hand, and the clearance is uniform without
unilateral phenomenon.
Note:
1. After the gear shifting arm is assembled, first test
whether the gear shifting is correct, and then continue
the installation after the gear shifting is correct;
2. Confirm that the spring is assembled in place and the
positioning plate is flexible;
3. The main shaft rotates flexibly without clamping;
4. Move the spindle up and down to check the axial
clearance of the spindle, which should be in the range of
0.3mm-0.5mm.
Assembly of oil pump
The assembly steps of the oil pump are as follows:
1. First pass the oil pump shaft through the oil pump
gear, and then load the oil pump pin into the pin hole
combining the oil pump and the oil pump gear;
2. Pass the oil pump shaft through the oil pump body,
and then the oil pump pin
Load into the pin hole of the oil pump shaft, then load
into the inner rotor and outer rotor of the oil pump,
