Hino S5-LJ05E04A Workshop Manual page 200

7–40 FUEL SYSTEM (J05E)
3.
(1)
CYLINDER HEAD
NOTICE
•
NOZZLE SEAT
•
(2)
SHTS021270600094
CLEANING THE INSIDE OF THE NOZZLE SEAT
If sludge sticks to the inside of the nozzle seat, spray a detergent
over it, wipe it off with a waste cloth, and wash it out with the
detergent.
If sludge sticks hard to the inside of the nozzle seat, remove
it with brush and a detergent.
It is advisable to perform a contact check using red lead.
Make sure that the inside of the nozzle seat is free of sludge or
foreign matters.