Yanmar 3JH3E Service Manual page 78

Chapter 3 Fuel Injection Equipment
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3,4JH3(B)(CJE
Nozzle body identification number
The type of nozzle can be determined from the number
inscribed on the outside of the nozzle body.
1) Hole type fuel injection nozzles
Sample
y
DLL A -150 P 225TCO
1
-lT
~ o e s i g h code
L_
Nozzle size P s,tze
S size
Spray angle
Mounting angle
of nozzle on
cylinder head
Code A: at angle
No code: not at angle
Type (Dll: semi-long type)
YANMAR
ldentification number
6-2 Fuel injection nozzle disassembly
NOTE :
1.
Disassemble fuel injection nozzle in a clean
area as for the fuel injection pump.
2. When disassembling more than one fuel injec-
tion nozzle, keep the parts for each injection
nozzle separate for each cylinder (i.e. the
nozzle for cylinder 1 must be remounted in
cylinder 1 ).
(1) When removing the injection nozzle from the cylinder
head, remove the high pressure fuel pipe, fuel leak-
age pipe, etc., the injection nozzle retainer nut, and
then the fuel injection nozzle.
Fuel injection nozzle
Printed
in
japan
!IIXS!ll-118009
®
©
~ - Fuel injection nozzte retainer
Hole type
3-33
(2) Put the nozzle in avise
NOTE : Use the special nozzle holder for the hole type
injection nozzle so that the high pressure mount-
ing threads are not damaged.
(3) Remo.ve the nozzle nut
NO TE : Use a special box spanner for the hole type (the
thickness of fhe two nozzle nuts is 15mm.
(4) Remove the inner parts
NOTE: Be careful not to loosen the spring seat, adjusting
shims or other small parts.
6-3 Fuel injection nozzle inspection
6.3.1 Washing
(1) Be sure to use new diesel oil to wash the fuel injection
nozzle parts
(2) Wash the nozzle in clean diesel oil with the nozzle clean.
ing kit.
Nozzle cleaning kit
1) Zexel nozzle cleaning kit:
Type NP-8486B No.5789-001
2) Anzen Jidosha Co., ltd. nozzle cleaning kit:
Type NCK-001
(3) Clean off the carbon on the outside of the nozzle body
with
a
brass brush.