Robin America DY41 Specifications download pdf (Page 38)

Maintenance

If the test results are found not good (poor injection and "after dripping"), carefully check and repair

the

following

manner:

a) Disassemble the nozzle holder and nozzle, and wash

in clean light

oil.

When washng, use a wooden chip

(for instance, wooden chopstick is servicable.) for

peeling off the carbon adhered to the nozzle.

b) After washing, pull out the needle halfway from

NEEDLE

the body of nozzle with your fingers and then let

go.

And check

the needle sinks by its own dead

BODY

weight.

c) If it does not sink, replace

in the form of a set.

d) Frinction surfaces of both the needle and nozzle

body are ultra precise finish.

So,

be sure to keep

the parts free

dust.

e) If "after dripping" is found, it is poor contact be-

tween the needle valve and the seat. In such a case,

advisable to replace it in the form of a set, nee-

Fig.

dle valve and nozzle body. However,

is possible

to coat chrome oxide on the tapered surface of the needle and get a good contact. Wash very carefully after correc-

tion.

Adjustment of the valve opening pressure of the nozzle spring in the nozzle holder

unnecessary because

was

al-

ready adjusted

the adjusting washer.

The spacer is an important part to set positions of the nozzle holder and the nozzle body. Pay attention to the posi-

tion of the pin.

h) When fitting the nozzle body to the nozzle holder, conform to the specified tightening toruqe,

viz.

[Tightening torque:

400

500

kg-cml

Recheck with the nozzle tester, if necessary.

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Robin America DY41 Specifications Page 38

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