75
6.5.4 Injection pump
• Check the fuel injection pump housing for cracks or breaks, and replace if damaged.
• Check and see if the lead seal for idling control and speed control levers have not been removed.
• No alterations must be made to the injection pump. If the lead seal is damaged the warranty on the
engine will become null and void.
• We strongly recommended that any faults developing in the injection pump should be taken care of
by authorized specialist personnel.
6.5.5 Injection Nozzle Maintenance (by authorized specialist personnel)
The injectors are designed to spray the fuel delivered by the injection pump directly into the spherical
combustion chamber in the piston crown.
The injector consists of the nozzle and the nozzle holder.
A copper seal fitted to the injector ensures gas-tight seating and good heat dissipation.
The opening pressure of the nozzle is adjusted by means of shims at the compression spring.
• Install a nozzle to a nozzle tester.
• Check injection pressure, and adjust the nozzle using the adjusting shim if the pressure does not
meet the specified limit.
• Check nozzle spray patterns and replace if damaged.
NEW USED
Injection Nozzle pressure 250kg/cm
2
220kg/cm
2
Caution : The injection lines are designed for high operating pressures and should thus be handled with
particular care.
• When mounting the pipes to the engine take care of good fitness.
• Do not bend pipes to permanent deformation (not for replacing the nozzles either).
• Do not mount any heavily bent pipes.
• Avoid bending the pipes at the ends by more than 2 to 3 degrees.
In case of faults in the injection system which might have resulted in excessive operating pressures, not
only the failed part but also the injection line has to be replaced.
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