Engine Exhaust Smoke Excessive (Black Smoke) - NC HT1.0 Original Instructions Manual

CHART A13—Engine exhaust smoke excessive (Black smoke)
Cause
Air intake or exhaust system is blocked.
Exhaust leak at the manifold .
One or more injector worn or
malfunctioning.
Worn or malfunction fuel injection pump
(FIP). Injection pump not delivering fuel.
Injection pump timing incorrect.
Retarded if smokes under load and
•
engine quieter than normal.
Advanced is smokes under load and
•
engine noisier than usual.
Engine compression low in one or more
cylinders.
Fault Finding
Visually check the air intake and exhaust intake for blockage or
obstruction-remove as required. Check the air filter elements for
signs of blocking-replace as required.
Check/correct leaks in the manifold gasket. Look for a cracked
manifold.
Check and externally clean the injector. If the problem still
persists, the injector must be checked by a FIE specialist or replace
with new.
Check for operation of the FIP.
The FIP must be taken to a local FIE specialist to have the fuel
delivery timing checked. Ensure that all obvious causes have been
eliminated before removing the FIP. (Check with local Kubota
agent)
If the pump has recently been removed and replaced the timing
could be incorrect if the correct removal procedures were not
followed.
The timing can only be checked by a FIE specialist using the
correct equipment.
Check the engine compression.
Remedy
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