Fuel Consumption Excessive - NC HT1.0 Original Instructions Manual

CHART B1—Fuel consumption excessive
Cause
Additional load on engine.
Operator technique.
Fuel Leaks.
Fuel is contaminated or incorrect grade of
diesel used.
Intake air or exhaust leaks.
Engine compression low in one or more
cylinders.
Injection pump timing incorrect.
One or more injector worn or
malfunctioning.
Worn or malfunction fuel injection pump
(FIP). Injection pump not delivering fuel.
Inlet & exhaust valve clearances set
incorrectly.
Fault Finding
Check/repair accessories and vehicle components.
Review operation for acceleration, deceleration and idling.
Check for external leaks and engine lubricating oil dilution. For
fuel dilution check for internal leaks at the fuel transfer pump and
injection pump.
Inspect and correct as required leaks in the high pressure lines,
fittings injector sealing washers, or delivery valves.
WARNING: Fine jets of fluid can penetrate the skip. Keep face
and hands well clear of pressurised fluid and wear protective
glasses. If fluid penetrates your skin seek medical help
immediately.
Refer to Fluids & Lubricants section for recommended diesel
fuels. If the fuel is suspect, verify by operating the engine with
clean fuel from a temporary tank.
Refer to Charts A13 & A14.
Check the engine compression.
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 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)
Set the valve clearances to the recommended clearances.
Remedy
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