FIGURE
67.
SLIDETEST
Testing Nozzles with
Hand
Operated Tester
The proper tester can be used to check opening pres-
sure, leak-down rate, chatter, and spray pattern.
Install cleaned and inspected nozzle in tester and
proceed as follows:
1.
Place nozzle in holder.
2.
Tighten nozzle nutfingertight, then using proper
size wrench, tighten nut to45 to
50
ft.-lb.
(61 to68
Nm).
3.
Connect delivery line between nozzle holder and
test stand; be sure that fittings match properly.
4. Test nozzle for jamming:
A.
Bypass pressure gauge.
B.
Press nozzle tester hand lever down quickly
so
that nozzle opens
6
to
8
times per second.
C.
Nozzle should chatter with a shrill whistling
sound, if valve moves properly.
Fuel
penetrirffon
of
the
skln
might
cause severe personaiinjury.
Do
not
let fhe nozzle high-pressure fuel
spray
against
skin
surfaces.
A
KlKl
CAPNUT
Lu
ADJUSTING
SCREW
-
LOCKNUT
-SPRING
MERICAN-BOSCH
FIGURE
68.
NOZZLE ADJUSTMENT
KlKl
NOZZLE
ADJUSTMENT
If the opening pressure is incorrect, connect nozzle
to a tester and hold the nozzle
in
a suitable holder
or
smooth jaw vise.
1.
Remove cap nut, Figure
68.
2.
Loosen locknut.
3.
Turn adjusting screwto desired opening pressure.
4. Tighten locknut to
45
to
50
ft.-lb.
(61
to
68
Nrn).
5.
Tighten cap nut
to
45
to
50
ft.-lb.
(61
to
68
Nrn).
6.
Remove nozzle from tester and holder.
YANMAR-AMERICAN
BOSCH
NOZZLE
ADJUSTMENT
If
the opening pressure is incorrect, connect nozzle
to tester and hold nozzle in a suitable holder or
smooth
jaw vise.
1.
Remove plug from cap nut, Figure
68.
2.
Loosen locknut.
3.
Turn adjusting screw to desired opening pressure.
4.
Tighten cap nut to
45
to
50
ft.-lb.
(61
to
68
Nm).
5.
Install plug using a thread sealant.
6.
Remove nozzle from tester and holder.
58
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by any means, is strictly prohibited.
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