NC SW6 Maintenance Instructions Manual page 59

CHART A9—Engine reduced power output
Cause
No fuel supply in the tank.
Oil level incorrect.
Engine overloaded.
Throttle adjustment incorrectly set or
binding.
Fuel is contaminated or incorrect grade of
diesel used.
Turbocharger boost control pipe leaking or
damaged, or waste-gate diaphragm ruptured.
Fuel injection lines leaking.
Fuel filter(s) blocked, fuel supply restricted.
Fuel is aerated.
Fuel lift pump not operating correctly (fuel
supply inadequate).
Air intake or exhaust system is blocked.
One or more injector worn or
malfunctioning.
Worn or malfunction fuel injection pump
(FIP). Injection pump not delivering fuel.
Fault Finding
Check the level in the fuel tank and replenish as required.
Check oil level.
Check for added loading from malfunctioning accessories or
driven units, brakes dragging and other changes in vehicle loading.
Disengage the hydraulic controls.
Check the engine maximum rpm is as specified in the Technical
Specifications section. Check the throttle linkages and cable for
binding etc.
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.
Check boost control pressure. Inspect and tighten fittings, repair
pipes, replace waste-gate assembly.
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.
Check/replace the fuel filter(s). Check fuel lines for restriction.
Check the fuel system for loose connections and possible air
ingress points. Rectify and bleed the fuel system.
Check that the lift pump is operating and delivering fuel to the
injection pump.
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 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. (Needs to be, Delphi DP210
capable agent for mechanical engines and for common rail
electronic engines see Delphi agent or JCB dealer
(www.delphi.com or www.jcb.com)
Remedy
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