Bison 4DW92-39D - Sharply Increase of Engine Speed; Shut-Down by Itself; Engine Speed Fluctuated Within a Certain Range

Reason of failure Troubleshooting
9. Sharply increase of engine speed
10. Shut-down by itself
11. Engine speed fluctuated within a certain range
Governor is failed; pull rod is getting
stuck at the position of high fuel level.
Sliding disk sleeve of governor is
getting stuck.
Adjusting arm is removed from fork.
1.
2.
3.
Repair governor and its pull rod.
Repair it.
Repair it.
1.
2.
3.
Air mixed in fuel pipeline; failure of
fuel supply pump; blockage of fuel
filter.
Piston seizing; shaft neck is
completely seized by bearing bush.
Fuel outlet valve of fuel injection
pump is getting stuck; broken of
plunger spring; Sliding disk sleeve of
governor is getting stuck.
1.
2.
3.
Discharge air and repair the fuel
supply pump; clean the diesel filter.
Since the clearance is not correct,
repair and replace it.
Repair or replace it.
1.
2.
3.
Uneven fuel supply for each cylinder;
fuel drip of fuel injector; fork screws
of pull rod are loose.
Clearance between fork and adjusting
arm is too large; sink mark appears as
the result of abrasion between steel
ball and sliding plate.
The axial movement of fuel injection
pump and camshaft is too large.
Sliding disk sleeve is getting stuck.
1.
2.
3.
4.
Make the adjustment and ensure the
even fuel supply for each cylinder;
repair or replace the needle valve parts
for fuel injection nozzle; fix the fork
screw.
Replace spare parts.
Adjust with copper washer.
Clean, repair or replace the sleeve.
1.
2.
3.
4.
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