Replacing Filler Neck - Yanmar 3YM30 Sevice Manual

9. Cooling water system

9.5.4 Replacing filler neck

1) Take out the copper pipe inside the filler neck with striking a circumference with a driver and so on.
When the filler neck is removed, remove it with being careful not to damage the fresh water cooler,
and scrap it.
2) Clean both new filler neck and the insertion part of fresh water cooler. Apply T7471 type activator
or equivalent on both the surfaces and let it evaporate.
3) Apply Loctite 603 (improved 601) glue or
equivalent on filler neck outside contour and press
the filler neck into the fresh water cooler with the
special tool.
Tool 1 Tool 1 Tool 1
Filler neck Filler neck Filler neck
4) To fix the filler neck on the fresh water cooler,
press the small copper tube inside the filler neck
with the special tool.
Note:
The top of this tube should be under the sealing
surface of the filler neck for the pressure cap.
5) Fit the pressure cap on the filler neck.
Filler neck Part No.
129673-44110
Refer to 4.2.2 for tool 1 and tool 2.
Copper tube Part No.
129673-44150
167
Press the filler neck
Filler neck
Fresh water cooler
Tool2
Press the copper tube
in the filler neck
Copper tube
Tool1
Loctite 601