IMPORTANT: Never use a steel brush to clean
nozzles. Steel brush may damage
1. Remove anti-corrosive coating from new or
reconditioned nozzles by washing them thoroughly with
2. Remove carbon from used nozzles and clean by
Inspecting Nozzle Parts
washing them in diesel fuel. If parts are coated with
hardened carbon or lacquer, it may be necessary to
use a brass wire brush.
3. After removing carbon or lacquer from nozzle exterior,
inspect lapped surface for nicks or scratches. Replace
if not in good condition.
4. Inspect piston part of nozzle valve (A) to see that it is
not scratched or scored. If any of these conditions are
present, replace nozzle assembly.
5. Inspect nozzle valve seat, nozzle, and intermediate
plate. Contact area of parts (B) must be scored or
pitted. Use inspection magnifier in JDF13 (JDE105)
Nozzle Cleaning Kit to aid inspection.
NOTE: A bad nozzle valve seat will cause fuel to drip
from nozzle. This condition will usually be noted
when making the "Leakage Test".