Yanmar YM276 Service Manual page 179

DISASSEMBLY
General Information
:ye dirt and water are the worst contaminants i n the fuel
injection system, the working area, tools, and cleaning
materials must be kept spotlessly clean. Whenever possible,
work i n an isolated,dust.free area.
Cover the work bench w i t h dean paper before beginning
disassembly o f injection nozzle.
As para are disassembled, place them i n a pan of dean
diesel fuel and leave them there until needed. D o n o t permit
these parts t o strike each other.
Use a separate pan of clean diesel fuel for washing parts
just before assembly.
1. Clamp handle of open-end wrench (use correct size t o fit
flats on nozzle holder) in a vise.
2.
Insert nozzle holder (6) into wrench with leakaff end facing
up. Remove upper holder nut (A) and copper washer.
A
-
Upper Holder Nut
B -Nozzle Holder
C -Nozzle Nut
3. Remove nozzle holder from wrench and withdraw shims (3).
spring (4). lower spring seat
(5).
and inter spindle (61 from
holder.
4. Insert nozzle holder upside down in wfench. Loosen and
remove the nozzle retaining nut (C). Remove nozzle from
holder.
5. Withdraw nozzle valve from nozzle. If valve isstuck,it may
be
necessary t o soak the nozzle assembly in Bendix cleaner,
acetone, or other commercial cleaners sold especially for freeing
stuck valves.
A
-
Upper Holder Nut F
-
Inter Spindle
B -Copper Washer G
-
Nozzle Holder
C -Shims H - N o ~ l s Anarnblv
0 -Spring I -Nozzle Nut
E
-
L o w Spring Saat
A
CAUTION: Use these nozzle cleaning fluids in accordance
with the manufacturer's instructions.
t
The valve and nozzle are individually f ~ t t e d and hand lapped.
I t
\ \
I
n
Keep these mated parts together, and do
n o t
permit the
I I
0 D
lapped surfaces t o mine in contact with any hard substance.
Do n o t touch the valve unless hands are wet with
fuel.
SME276OfIM304
i85YMa
YM276and 2760
Kmamoro,
Prmted m
Jamn