Anticorrosion Zinc Anode - Kohler 6EKOD Service Manual

5.9 Anticorrosion Zinc Anode

The heat exchanger contains an anticorrosion zinc
anode (plug) to prevent electrolytic corrosion by
seawater.
Check and replace the anticorrosion zinc anode at
intervals recommended in the service schedule.
Depending upon operating conditions and seawater
properties, the anticorrosion zinc anode may require
more frequent replacement. See Figure 1-2 for the
location and use the following procedure.
Anticorrosion Zinc Anode Replacement
1. With the generator set cooled, close the seacock,
open the petcock on the engine, and drain the
coolant into a suitable container.
2. Remove the anticorrosion zinc anode (plug) from
the heat exchanger.
3. Use a wire brush to remove the loose corrosion on
the anticorrosion zinc anode. Replace the anode
according to Figure 5-23 and Figure 5-24.
Anticorrosion Zinc Anode Replacement
New Anode
Dimensions mm (in.)
Models
6EKOD/
5EFKOD,
9EKOZD/
6.35 (0.25) x 20 (0.78)
7EFKOZD,
11EKOZD/
9EFKOZD
Figure 5-23 Anticorrosion Zinc Anode (Plug)
Measurements
34 Section 5 Cooling System
1. Diameter: 6.35 mm (0.25 in.)
2. Length: 20 mm (0.78 in.)
Figure 5-24 Anticorrosion Zinc Anode (Plug)
4. Clean the threaded hole of the heat exchanger and
5. Close the petcock on the engine and open the
6. Start the generator set and check for leaks at the
Replace When
Percent of Zinc
Remaining Is:
<50% of
length/diameter
coat the threads of the anticorrosion zinc anode
(plug) with pipe sealant suitable for marine
applications. Cut the anticorrosion zinc to the
correct length. Install the anticorrosion zinc anode
into the heat exchanger.
seacock. Refill the cooling system.
anticorrosion zinc anode location. The pump is
operating if the cooling water flows from the
exhaust outlet. If water is not discharging at the
exhaust outlet, see Prestart Checklist—Seawater
Pump Priming in the operation manual.
1
2
TP-6774 2/14a