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KD 477-2 Workshop Manual_cod. ED0053029370_
1° ed
_ rev.
00
XI
40
41
42
43
5 kgm (49 Nm)
Engine
Engine
Testing air tightness
Feed pressurized air at 6 kg/cm² into the fuel sullpy union and com-
pletely immerse the pump in oil or diesel fuel for about 20 ÷ 30 secon-
ds (fig.40); check that no air bubbles are released.
N.B.: Tightness can be checked by compressing the springs to
52.8 ÷ 54.4 mm, which corresponds to the bottom dead centre wor-
king position of the pump.
Injector checking and setting
1
. Clean out nozzle holes with a thin piece of wire (fig. 42) of the
same size as that of the nozzle holes indicated on the table:
2
. Set up injector on a test bench (tool cod.
00365R0430
).
3
. Unscrew injector lock coupling (No 3 fig. 41) or nozzle ring nut and
insert adjustment shim (7, fig. 41) until the pressure indicated in
the table hereunder is reached on the pressure gauge while pum-
ping.
4
. Tighten the nozzle ring nut (No 3 fig. 41) at:
5
. When setting is complete, while still at the test bench, run pum-
ping elements a few times and check the amount of diesel that
passes through the upper leak-off of the injector (fig. 43).
Ø holes mm
Setting
kg/cm
2
INJECTION EQUIPMENT
Injectors (fig. 41)
1
.Body -
2
.Nozzle -
3
.Ring nut -
4
.Plate -
5
.Rod -
6
.Spring -
7
.Adjustment shim.
KD477-2
0,25
KD477-2
225 ÷ 235
