DRIVE GP-SWING-A 20R3779 - Caterpillar

Location of the Corrosion Protection Post
C32 SCAC Marine Engine
Illustration 1 g06195746
(1) Bonding connector
(2) Bonding studTesting the Voltage Potential
Operate the engine for at least 30 minutes, then stop the engine. Disconnect the engine from the shore power connection. Use a 257-9140 Multimeter and a 244-1536 Cable Group to test the voltage potential from the salt water to the engine. A silver-silver chloride half cell probe is widely available if the Cat tools are not available.
Connect a #8 American Wire Gauge (AWG) cable from the sacrificial anode to the bonding system of the vessel.
Test the voltage at the bonding stud.
Test the voltage at the bonding connector.Results of the Test
The voltage potential must be between -0.500 mV and -0.800 mV.Note: A value near or greater than 0.0 mV is highly corrosive.Measure the galvanic potential of the system and apply zinc or other less noble metal to divert corrosion. Contact your Cat dealer for more information.