Checking No. 2 Opening Pressure - Yanmar 6LPA-STP2 Service Manual

Fuel Injection Nozzle
12/05

Checking No. 2 Opening Pressure

1. Assemble the nozzle assembly as shown in
Figure 6-36. NOTICE: Exclude the No. 1
pressure spring and pressure pin. Align the
holes of the nozzle body, tip packing and nozzle
holder body (Figure 6-37).
Figure 6-36
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Figure 6-36
1 – Nozzle Holder Body
2 – No. 1 Pressure Spring Seat
3 – Adjusting Shim
4 – No. 2 Pressure Spring
5 – No. 2 Pressure Spring Seat
6 – Tip Packing
7 – Straight Pins
8 – Lift Adjusting Shim
9 – Nozzle Assembly
10 – Nozzle Holder Retaining Nut
Figure 6-37
Figure 6-37
2. Tighten the nozzle holder retaining nut using a
14 mm socket (Figure 6-38, (1)) torque to:
300 kgf·cm, 29.42 N·m (22 lb-ft).
NOTICE: NEVER tighten excessively.
Otherwise, deformation, adhesion or other
defects may occur.
6LPA Service Manual
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(8)
(2)
(3)
(1)
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0005299
© 2007 Yanmar Marine International
Figure 6-38
Figure 6-38
3. Install the fuel injection valve to the nozzle
tester and bleed the air out from the union nut
(Figure 6-39). WARNING! Never put your
hands over the nozzle injection hole.
Figure 6-39
Figure 6-39
4. Pump the tester handle several times as quickly
as possible to discharge foreign matter from the
injection hole.
FUEL SYSTEM
(1)
0005436
0005437
6-23