Yanmar 4HLA-HTP Manual Del Usuario página 52

(2) Replacing Engine Lube Oil and Lube Oil filter. (See 5.2.1(1))
(3) Replacing Cooling Fresh Water
Cooling performance drops when the cooling water is contaminated with rust and scale.
Even if LLC is added, the cooling water must be periodically replaced because the properties of
the agent will degenerate. Replace the cooling water periodically.
Draining the Cooling Fresh Water
●
Supplying Cooling Fresh Water
●
(4) Inspecting and Replacing Anti-
Inspect and replace the anti-corrosive zinc
periodically.
①Close the kingston cock.
②Drain the cooling seawater.
After draining, close the cocks.
③Remove the plug labeled ZINC and indicat-
ed in the diagram.
Anti-corrosive zinc is on the following parts.
Part
Intercooler 119574-18790
Engine oil cooler 119574-44150
Fresh water cooler 119574-44150
*
: For 4LHA-DTP/-DTZP/-STP/-STZP
*
④Check the zinc on the inside of the plug to
determine the amount of wear to the anti-corrosive zinc.
Replace the anti-corrosive zinc when it has been reduced to less than 1/2 of its original size.
●
If there is only a little bit of wear, clean the surface by sanding off any corroded areas.
●
⑤Replace plug.
⑥Open the kingston cock and check water leakage.
Intercooler
Lube oil cooler
Zinc
→ See 4.9.1.
→ See 3.5.
Corrosive Zinc
→ See 4.9.1
Parts No. Quantity Dimensions D×L
1
2
2
Zinc
[NOTICE]
If replacement of zinc is neglected
and operation is continued with a
small volume of anti-corrosive zinc,
corrosion of the seawater cooling
system will occur and water leak-
age, parts breakage, or accidents
will result.
Anti-corrosive zinc label
1/2"×1"
1/2"×1"
1/2"×2"
Fresh water cooler
Zinc
_ _
49
Anti-corrosion plug
ZINC
D
L
Zinc