54
Maintenance: Fuel System
Adjusting the fuel injection pressure
1. To adjust injection pressure, remove the set
screw from the nozzle holder, loosen the cap nut,
and then turn the adjusting screw. To increase
the injection pressure, tighten the screw. To de-
crease the injection pressure, loosen the screw.
2. When the pressure meets the standard value,
tighten the cap nut to 69 - 78 Nm (7 - 8 kpm)
[51 - 58 lbf.ft].
3. Tighten the set screw to 34 - 44 Nm
(3.5 - 4.5 kpm) [25 - 33 lbf.ft].
Fuel injection nozzle installation
1. Disconnect the fuel inlet connector from the
injector assembly.
2. Attach three O-rings on the injector and coat them
with grease.
3. Coat the gasket with grease and attach it to the
injector. Insert the injector assembly into the cy-
linder head aligning its connector hole with the
rocker case hole.
4. Attach the nozzle inlet connector to the nozzle by
applying the specified torque, 64 to 74 Nm (6,5 to
7,5 kpm) [47 to 54 lbf].
5. Attach the nozzle gland and tighten the nut at the
specified torque (98 N -m (10 kgf m) [72 lbf]).
6. Attach the injection pipe and fuel leak-off pipe.
7. Before mounting the rocker cover, operate the
engine at approx. 850 rpm and check for leaka-
ges.
Fuel injection nozzle spray pattern
Check spray conditions when checking fuel injection
pressure. Good spray conditions are as follows:
·
Fuel is injected from all nozzle holes.
·
The fuel is sprayed in a conical shape.
·
No big particles but fine ones.
·
No oil drip is left after injection.
If the nozzle fails to spray fuel properly, replace with a
new one.
NOTE! Fuel injection pressure and nozzle spray pat-
tern check intervals may be extended in steps of 250
hours if they are ok at 1000 hrs.
Plus d'informations sur : www.dbmoteurs.fr
Summary of Contents for D49A MS
Page 87: ... Notes Plus d informations sur www dbmoteurs fr ...
Page 88: ... Plus d informations sur www dbmoteurs fr ...
Page 89: ... Plus d informations sur www dbmoteurs fr ...
Page 90: ...Plus d informations sur www dbmoteurs fr ...
Page 91: ...Plus d informations sur www dbmoteurs fr ...
Page 92: ...7744281 English 07 2004 Plus d informations sur www dbmoteurs fr ...