G343 INDUSTRIAL ENGINE Caterpillar

Engine Lubrication System

Usage:

Gas Engine Lube Oil

Checking Oil Pressure Gauge Reading

After starting and during operation, frequently observe the oil pressure gauge. If the gauge indicator registers below "NORMAL", or if the indicator fluctuates, check the oil level and take corrective measures.

Checking Oil Level

Check the oil level with the engine idling. Oil level must be between the ADD and FULL marks on the oil level gauge. Add oil as required. See Lubrication and Maintenance Chart for proper oil.

CHECKING CRANKCASE OIL LEVEL

Draining Crankcase Lube Oil

With engine stopped and oil warm:

1. Wipe dirt from each oil filter housing.

2. Remove the oil filter housing drain plug.

REMOVING OIL FILTER DRAIN PLUG

3. Remove the oil cooler drain plug.

OIL COOLER DRAIN PLUG

4. Remove the crankcase oil drain plug.

REMOVING CRANKCASE DRAIN PLUG

Cleaning Breather

1. Remove the breather cover and breather element.

2. Loosen the hose clamp and remove the fumes disposal tube.

LOOSENING HOSE CLAMP

3. Remove the breather assembly.

REMOVING BREATHER ASSEMBLY

4. Wash the breather and elements in clean diesel fuel or kerosene.

5. Install the breather, breather element and cover.

Installing New Oil Filter Elements

1. Drain the oil filter housing.

2. Remove both covers.

REMOVING FILTER COVER

3. Remove both filter elements.

REMOVING FILTER ELEMENT

4. Wipe both filter housings.

WIPING FILTER HOUSING

5. Install new filter elements and covers.

6. Install drain plugs which were removed.

7. Fill the crankcase to the FULL mark on the oil level gauge.

NOTE A: If equipped with an air cleaner service indicator, service the element when the piston locks in the raised position. Service intervals will be shortened under dusty conditions. If after servicing the air cleaner, the exhaust smoke and/or loss of power continues, discard the element and install a new element. Install a new element at least once a year.

NOTE B: Regardless of hours, change oil and filters every six months.

Key to Lubricants:

NGO -Natural Gas Engine Oil

MPG -Multipurpose-type Grease

Fuels

A property equipped engine will develop full rated horsepower on a clean, dry natural gas fuel having a minimum heat valve of 900 BTU (British Thermal Unit) per cubic foot. Consult your Caterpillar dealer for recommendations if a lower heat value fuel is to be used.

Lubricating Oils

Use only NATURAL GAS ENGINE OILS in your Caterpillar Gas Engine crankcase.

NATURAL GAS ENGINE OILS: API Engine Service Classification - none: These oils are formulated to the Supplement 1 diesel performance level or higher, with additives which are ashless, or which contain ashless dispersants and either ashless or organo-metallic oxidation inhibitors. These oils are recommended for use in all Caterpillar Natural Gas Engines and other gear compartments as specified.