Fuel Tank Drain; Fuel Injection Nozzle Tip Change - Volvo Penta D25A MS Operator's Manual

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Fuel injector nozzle change
IMPORTANT! Cover all open fuel injection pipes,
fuel intake openings and the fuel injectior nozzle
to keep dirt out
Remove the fuel injector
1. Remove the rocker cover.
2. Remove the clamp from the fuel injection pipe.
3. Remove the fuel injection pipe from the fuel injec-
tor.
4. Remove the injector inlet connector.
5. Remove the injector gland nut to take off the
gland.
6. Pull out the fuel injector using the special tool.
Remove the nozzle
IMPORTANT! The injector nozzle is very
delicate, handle with care.
1. Fasten the fuel injector in a vice with protection
plates.
2. Remove the set screw and the cap nut.
3. Loosen the adjusting screw with a screw driver
until it can be loosened by hand.
Note! This operation is required to release spring
pressure applied to the nozzle tip. When spring pres-
sure is applied, it is hard to loosen the retaining nut.
3. Remove the retaining nut and remove the nozzle.
Nozzle cleaning
IMPORTANT! Do not change the pairing of
needle valve and body when cleaning more than
one at a time.
1. Dip the nozzle in clean fuel oil, and disassemble
the needle valve.
2. Clean the injection holes.
3. After cleaning, carefully insert the needle valve
into the body in clean oil.
Maintenance: Fuel System
47