Page 311 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

Repair operations involving removal of the solenoid valve retaining nut are not permissible.
Common rail injector with helical locating pins cannot be repaired.

The Common rail injector with straight pins can be repaired, however the straight pins must be replaced.
Re-use the thrust pieces, sleeves, springs and shims removed.
The use of unsuitable or poor quality tools can lead to injury and component damage.
Store cleaned parts and add-on components in clean, well organized containers.

Clean the outer surface of Injector body thoroughly after removing from Engine. Use a cap to seal the Inlet
and Return connection and the nozzle cone.

Note: DO not use wire brush to clean nozzle cone it may damage nozzle orifices
Ultrasonic cleaning Of CRDI Injector Nozzle.

Remove the protective cap of nozzle cone
Clamp the Common rail injector in the clamping fixture and suspend it in the ultrasonic cleaning bath such
that the nozzle retaining nut is completely immersed in the cleaning agent.

Set the temperature of the cleaning agent to 140...158 °F.
Take the Injector out of the cleaning bath after 15 minutes. Dry the components with compressed air and
place it in a clean container.
Visual Inspection before service

Check the Common rail injector for external contamination, coke deposits, corrosion and mechanical
damage. If contamination is slight then repair is possible

Note: If a Common rail injector is severely damaged or heavily corroded or if the electrical
connection is damaged, the Injector should not to be repaired.

Check the Guide collar of CRDI injector. If no wear on guide collar, repair is possible incase more wear
repair is not possible

Pressure test

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CITS : Automotive - Mechanic Diesel - Exercise 17.3