Caterpillar Diesel Marine Engine 3512

Perform every 7500 hours or 1,460,000 liter (385,500 U.S. gallon) of Fuel Rated 1601 to 1800 rpm

To minimize downtime and provide you with the lowest cost and highest value, Caterpillar recommends that the engine be overhauled before failure by scheduling an overhaul with your Caterpillar dealer

Sign off on the 7500 Hours Top End Maintenance

- Perform every 250 hours or 33,400 liter (8,800 U.S. gallon) of Fuel Rated Up to 1300 rpm, 41,000 liter (10,800 U.S. gallon) of Fuel Rated 1301 to 1600 rpm, 48,500 liter (12,800 U.S. gallon) of Fuel Rated 1601 to 1800 rpm

1. There are two types of cooling system cleaners available. One is the 6V4511 Standard-Type in the 2 liter (½ U.S. gallon) container and the other is the 4C4611 Fast Acting-Type in the 4 liter (1 U.S. gallon) container

2. The 6V4511 requires approximately 120 service hours of engine operation to remove scale, lime and other debris. The 4C4611 requires only 90 minutes of engine operation. Both types must remain in the system for a minimum of specified time to work properly, however, neither type will harm the engine if left in for a longer period of time

3. The 6V4511 must be added before the Every 3000 Service Hour maintenance interval. Add 1 liter (1 U.S. quart) of Caterpillar Cooling System Cleaner, 6V4511, for every 15 liter (4 U.S. gallon) of cooling system capacity. Continue to operate the engine for the specified time before draining

4. The 4C4611 may be added just prior to draining (such as the same day of a day trip) and the system cleaned and flushed after operating for the specified time period

- Clean the cooling system (radiator) fins of dirt and debris

Warning: To avoid personal injury due to unexpected start, attach a DO NOT OPERATE or similar warning tag to start switch or controls before performing maintenance or repairing the engine. DO NOT ALLOW UNAUTHORIZED PERSONNEL ON OR AROUND THE ENGINE WHEN IT IS BEING SERVICED

Notice: Accumulated grease and oil on an engine and/or platform (walkway) is a fire hazard. Remove this debris with steam cleaning or high pressure water, Every 1000 Service Hour interval or each time any significant quantity of fluid is spilled on an engine and/or platform

Inspect Engine for Leaks and Loose Connections

Wipe all fittings, caps and plugs

Check the engine, cooling system, aftercooler and generator (if equipped) for dirt and debris

Inspect the radiator (if equipped) for leaks and trash build-up

Oil Consumption as an Overhaul Indicator

Perform every 11000 hours or 1,460,000 liter (385,500 U.S. gallon) of Fuel Rated Up to 1300 rpm

To minimize downtime and provide you with the lowest cost and highest value, Caterpillar recommends that the engine be overhauled before failure by scheduling an overhaul with your Caterpillar dealer;

Sign off on the 11000 Hours Top End Maintenance

- Check the engine crankcase lube oil on a daily basis. The dipstick is stamped on both sides

Make sure you read and understand the information in the Safety and Lubricant Specifications sections of this Manual before you proceed with maintenance of the lube oil system

Be sure to read the correct side of the dipstick. The ADD and FULL levels are not the same when checking the oil while the engine is stopped or idling

1. One side is marked to be read when checking the oil level with the ENGINE STOPPED WITH OIL COLD

2. The other side is marked to be read with the ENGINE AT LOW IDLE WITH WARM OIL

1. Check the oil level with the engine STOPPED. 2. Maintain the oil level to the FULL mark (between the ADD and FULL marks) on the ENGINE STOPPED WITH OIL COLD side of the dipstick. Add oil if necessary. Engine Running:

1. Measure engine oil level with the engine operating at low idle 2. Maintain oil level to FULL mark on the ENGINE AT LOW IDLE WITH WARM OIL side of dipstick