Daewoo DE12 - Page 121

Measuring point for pre-lift
Take the indicated value on the dial
gauge at a point of primary opening pres-
sure + approx. 10kgf/cm
2
.
Note: Locate the point of primary
opening pressure + approx.
10kgf/cm
2
while dropping the
pressure.
- 118 -
L
0
EQM4052I
Amount of lift
Primary opening pressure
Tester pressure
M
<Figure 4-46> Measuring pre-lift
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". (Figure 4-47)
13
14
15
16
A
EQM4053I
<Figure 4-47> 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 350~450kgf/cm
2
to fully
lift the needle valve. (Figure 4-48)
b. Release the nozzle tester handle to
decrease the tester pressure, then take
a note of the movements of the dial
gauge
L
0
EQM4054I
<Figure 4-48> Operation of nozzle tester
Amount of lift
Tester pressure
Primary opening
pressure
Secondary
opening pressure
350~450
kgf/cm
2
M
+
0.05