4-77. INJECTION NOZZLES REPLACEMENT (Continued).
Thoroughly clean nozzle bore in cylinder head
before reinserting nozzle holder assembly.
Pay particular attention to seating surfaces, in
order that no small particles or carbon will
cause assembly to be cocked or permit
blow-by of combustion gases.
Clean injection nozzle seats in cylinder head,
removing any carbon buildup from the seat.
Failure to clean the seat can cause combustion
Be careful not to strike nozzle tips (5)
Remove protective cap from nozzle tip (5) and
install nozzle and holder assembly with new
seal washer (2) into cylinder head nozzle bore,
from which it was removed.
Torque nozzle and holder assembly to 20 ft-lb
Remove protective covers from the fuel inlet
end of the nozzle and from the fuel lines.
Connect all fuel lines. Torque the fuel line
connector nuts (1) to 30 ft-lb (41 N.m).
Purge fuel lines of air by loosening connector
(1) and cranking engine until solid fuel, free
from air, flows from the connection. Re-torque
connector (1) to 30 ft-lb (41 N.m).
Start engine and check for fuel leakage at con-
nections and lines.