Injection Nozzle Maintenance - Daewoo DE12T Manual

5.5.4. 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.

5.6. 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 com-
pression spring.
Normal
•
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.
Engine Model
Injection nozzle pressure
Abnormal
DE12T/TI/TIA
220 kg/cm 2
- 109 -
EA0M3003
Abnormal
EFM1006I
DE12TIS
160 / 220 kg/cm 2
MAINTENANCE AND CARE