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KD 477-2 Workshop Manual_cod. ED0053029370_1° ed_ rev. 00

5 kgm (49 Nm)

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 (g.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

. Clean out nozzle holes with a thin piece of wire (g. 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).

. Unscrew injector lock coupling (No 3 g. 41) or nozzle ring nut and

insert adjustment shim (7, g. 41) until the pressure indicated in

the table hereunder is reached on the pressure gauge while pum-

ping.

. Tighten the nozzle ring nut (No 3 g. 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 (g. 43).

Ø holes mm

Setting kg/cm

INJECTION EQUIPMENT

Injectors (g. 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

Kohler KD 477-2 User Manual

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