Daewoo DE12T - Inspection of Secondary Opening Pressure

c. If the measured pre-lift value deviates from
the specified limit, replace the pin (14, 16),
lift piece (13), spacer (15), and nozzle
assembly (A) with a new “nozzle service
kit”.
Inspection of secondary opening pressure
a. After confirming the pre-lift, operate the
nozzle tester and increase the internal
pressure up to 350 ~ 450 kgf/cm
2
to fully lift
the needle valve.
b. Release the nozzle tester handle to
decrease the tester pressure, then take a
note of the movements of the dial gauge.
c. Take the indicated value on the pressure
gauge at the point of time when the needle
of the dial gauge indicates the specified
needle valve lift value. (In general, pre-lift “
M “ + 0.05mm. Refer to following figure.)
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MAINTENANCE OF MAJOR COMPONENTS
13
14
15
16
A
EQM4053I
L
0
+0.05
EQM4054I
Secondary
opening pressure
350~450
kgf/cm
2
Primary opening
pressure
Amount of lift
0
20
40
60
80
100
0
EQM4055I
90
80
70
60
50
40
30
20
10
0
200
100
0
500
400
300
EQM4056I