SENSOR GP-PRESSURE 2213415 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures. This maintenance is to be performed at the interval specified in the Maintenance Schedule. Before proceeding with this maintenance, perform Daily maintenance interval requirements.Zinc Rods
Inspecting Zinc Rods
Zinc rods are inserted in the engine's cooling system to help prevent the corrosive action of salt (sea) water. The reaction of the zinc to the sea water causes the rods to deteriorate.Therefore, the zinc rods must be inspected Every 50 Service Hours, and replaced when they have deteriorated.Depending on the engine and attachments, their location may be in the oil cooler heat exchanger bonnet, sea water heat exchanger bonnet, aftercooler lines, sea water pump and/or in the sea water lines. 3500 Family Marine Engine Zinc Plug Locations:* Seawater oil cooler/heat exchanger - There are three (3) zinc rods and plugs located in the end bonnets of the heat exchanger.* Seawater Pump - There is one (1) zinc rod and plug located on the seawater pump elbow.* Marine Gear Heat Exchanger (7200 Series) - There is one (1) zinc rod and plug located in the end bonnet. For all other marine gears refer to the manufacturers recommendations. To service the zinc rods and plugs, use the following procedure:1. Remove and observe condition of all zinc rods. 2. Tap the zinc rods lightly with a hammer. If a rod has deteriorated, or flakes apart when tapped, install a new zinc rod. Inspect the plug for damage. Replace if necessary.Installing New Zinc Rods
1. Unscrew or drill the existing rod from the plug base.2. Install a new rod in the plug base.3. Install the plug.Caterpillar Marine Gear
New or Reconditioned Only
Change oil and filter on a new or reconditioned unit after the first 50 Service Hours. See Caterpillar Marine Gear in the Every 1000 Service Hours section of this manual. For marine gear other than Caterpillar 7200 Series, refer to the manufacturer's recommendations.