Yanmar 4JH4E - Page 169

4. Disassembly and reassembly
149
(18) Removing the fuel injection nozzles
3JH4E and 4JH4E (2-valve head)
Remove the bolt for the fuel nozzle retainer,
and pull out the fuel nozzle retainer and fuel
injection nozzle.
Note:
If the fuel nozzle protector stays in the
cylinder head, make a note of the cylinder
number and be sure to remove it when
disassembling the cylinder head.
4JH4-TE and 4JH4-HTE (4-valve head)
1) Remove the pipe seals from rocker arm
cover.
Insert a minus driver in the slit part of the
rocker arm cover, and remove it.
Take off the rocker arm cover after removing
the pipe seals.
[NOTICE]
The fuel nozzles are caught in the pipe seals.
The pipe seals will be damaged if the rocker
arm cover is lifted with a pipe seal sticking to
the rocker arm cover.
2) Loosen the tightening bolts on the fuel
injection nozzle retainers and extract the fuel
injection nozzles.
[NOTICE]
1) If nozzle seat is left in the cylinder head,
extract the nozzle seat after removing the
cylinder head from cylinder block.
2) Whenever extracting fuel injection nozzle,
replace the used nozzle protector with a
new one.
Bolt
Washer
Fuel nozzle
retainer
Cylinder head
Fuel injection nozzle
Fuel nozzle protecto
r
Fuel injection seat
010384-00E
Slit Pipe seal
Minus driver
Cap nut of fuel injection pipe
010437-00E
Fuel injection pipe Pipe seal
Fuel nozzle
011224-00E