Yanmar 4BY - Page 152

FUEL SYSTEM
BY Service Manual
6-23
Repair
Figure 6-30
4. Remove special tool OEM No. 13 5 192 from
timing case cover (Figure 6-30).
Figure 6-31
5. Remove special tool OEM No. 13 5 191 and
install nut (Figure 6-31, (1)). Tighten nut to
65 N·m (48 ft-lb).
Figure 6-32
6. Install new O-ring on plug (Figure 6-32, (1)).
Apply a light coat of oil to O-ring and install
plug. Tighten to:
• M30 x 1.0: 70 N·m (52 ft-lb)
• M40 x 1.5: 30 N·m (22 ft-lb)
Figure 6-33
IMPORTANT
Start both union nuts on high-pressure line
before tightening either one.
7. Install high-pressure line and tighten union nuts
(Figure 6-33, (4)) using special tool OEM No.
13 5 020 to 23 N·m (204 in.-lb). See Removing
and Installing High-Pressure Fuel Lines on
page 6-17.
8. Connect fuel return line and banjo bolt
(Figure 6-33, (3)) with new seal washers.
R13 0673A
0003687
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