WHEEL & TIRE AR 2389664 - Caterpillar

Illustration 1 g01700317
The heat exchanger has three zinc rods.
Inspect the Zinc Rods
Inspect the zinc rods within 24 hours of initially filling the plumbing with sea water. If no significant corrosion is noted, inspect the zinc rods again after seven days or 50 hours of engine operation after having been immersed in sea water. If no significant deterioration is noted, continue inspections after every 50 hours of engine operation.
The zinc rods are red for easy identification. Remove the zinc rod.
Illustration 2 g00104048
Tap the zinc rod lightly with a hammer. If the zinc rod has deteriorated, or if the zinc rod flakes, install a new zinc rod. Replace the Zinc Rods
Illustration 3 g00104049
Unscrew the old zinc rod or drill the old zinc rod from the plug. Clean the plug.
Apply 9S-3263 Compound to the shoulder of a new zinc rod. Apply the compound only to the shoulder of the zinc rod. Install the zinc rod into the plug.
Coat the external threads of the plug with 5P-3413 Pipe Sealant. Install the zinc rod. Refer to Special Publication, SENR3130, "Torque Specifications" for more information about torque specifications.