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Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
Oil-Water Separator - Drain Water
From water drain valve, fuel is discharged together with water. Wipe off any spilled fuel completely.
1. Turn the 3-way cock of oil-water separator to the
"drain" position with the handle attached to it.
2. Loosen the air vent plug.
3. Open the water drain valve, and drain the water
from oil-water separator.
4. Turn the 3-way cock of oil-water separator on the
inlet side to the "operation" position.
5. Close the water drain valve.
6. Bleed air from the oil-water separator.
7. Turn the 3-way cock of oil-water separator on the
outlet side to the "operation" position.
Oil-Water Separator Element - Replace
1. Place a tray under the oil-water separator to catch
fuel.
2. Turn the 3-way cock of oil-water separator to the
"Replacement" position with the handle.
3. Loosen the air vent plug.
4. Open the water drain valve, and drain fuel from oil-
water separator.
5. Remove the cover mounting bolts and remove the
cover.
6. Replace the element with a new one.
7. After confirming that O-ring and spring are at-
tached to the cover, install the cover.
Note: Be sure to use a new O-ring.
8. Close the water drain valve.
9. Bleed air from the oil-water separator.
10. Turn the 3-way cock to "Operation" position.
11. Be sure to bleed air from fuel system after replace-
ment of element.
Note: (a) For bleeding air from fuel system, refer to
"Fuel Filter - Bleed Air"
(b) During subsequent engine operation, check
for fuel leaks from the cover mounting por-
tion. If fuel leaks, retighten the cover mount-
ing bolts.
8-6
(3-2).
3-way valve
Air vent plug
(outlet side)
Handle
Water
drain valve
3-way valve (inlet side)
Fig. 8-6 Oil-Water Separator - Drain Water
Fig. 8-7 Oil-Water Separator Element - Replace
3-way valve
Drain/
Run
Change
Cover
O-ring
Spring
Element
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Troubleshooting
