DETROIT DIESEL 53
2.0
T R O U B L E SHOOTING CHARTS (Needle Valve Injectors)
Chart 4
SUGGESTED REMEDY
6. Remove the carbon in the tip with tip reamer
1. Replace the needle valve and tip assembly.
J 9464 which is especially designed and ground for
2. Replace the needle valve and tip assembly.
this purpose.
3. Replace the spring seat.
7. Check the hole size of the spray tip orifices. Then,
using tool J 4298-1 with the proper size wire, clean the
4. Replace the valve spring.
orifices.
5. Disassemble the injector and clean the parts.
SEC. 2.0 Page 9
August, 1972