D343 REAR ENGINE FOR 666 AND 657 SCRAPERS Description Of Lubricants Caterpillar

Description Of Lubricants
1.1. Crankcase Lubricating Oils
2.1. Transmission Lubricants
3.1. Lubricating Grease
4.1. Type of Lubricants and SAE Grades to Use
5.1. Diesel Engine Crankcase Lubricating Oil Change Periods

The lubricants recommended for use in this machine can be identified by the sub-headings preceding their descriptions that follow. The proper selection of one of these types of crankcase lubricating oils, transmission lubricants, and SAE grade of oils can be made from the information in the topic, TYPE OF LUBRICANTS AND SAE GRADES TO USE.

Crankcase Lubricating Oils

Superior Lubricants (Series 3); API Engine Service Classification CD: Additive type oils that meet rigid, high quality standards and are certified for use in AVSpare diesel engines. Must contain zinc dithiophosphate when used in a hydraulic system.

MIL-L-2104A Oil, API Engine Service Classification CA; or MIL-L-2104B Oil, API Engine Service Classification CC: Additive type oils, but milder than Superior Lubricants (Series 3).

Straight Mineral Crankcase Lubricating Oil: Most of these oils will contain a very small concentration of engine oil additives. Oils without additives can be used in certain compartments as specified.

Transmission Lubricants

Multipurpose-type Gear Lubricant (MIL-L-2105B); API Gear Lubricant Designation, GL-5: Used in gear compartments where gear loads and speeds are factors. In extremely cold temperatures consult your oil supplier for special Arctic Lubricants.

Lubricating Grease

Ball and Roller Bearing Lubricant: This lubricant is a mixture of mineral oil and metallic soaps. Use No. 2 grade for most temperatures. For extremely low temperatures use No. 0 or No. 1 grade.

This grease can be applied to all bearing points - plain bearings, ball bearings and roller bearings - where equipped with hydraulic pressure fittings or when bearings are hand packed.

Use only a high grade short fiber grease. This grease must be satisfactory in anti-friction bearings at speeds up to 3000 RPM at a maximum temperature of 300°F. It is a grease with sufficient adhesive qualities to cling to the bearings in all extremes of high and low operating temperatures.

Type of Lubricants and SAE Grades to Use

The grade of oil is classified in terms of viscosity (fluidity or flow ability) and is identified with numbers called SAE numbers. There are two distinct series of numbers within the SAE numbering system, one being for crankcase lubricating oils and the other for transmission lubricants. Oils with lower SAE numbers within each of these two series are more fluid and flow more readily than do those with the higher numbers within the same series.

To determine if the oil in the compartments will flow in cold weather, remove the oil level gauge or dip a finger into the oil before starting and if the oil will flow off, the oil is fluid enough to circulate properly.

The oil specification chart will aid in the proper oil grade selection for the various compartments. The proper SAE grade of oil to select is determined by the atmospheric temperature at which the machine is started. However, during operation SAE 10W oil can be used successfully in the diesel engine crankcase when atmospheric temperatures are as high as 70°F.

Diesel Engine Crankcase Lubricating Oil Change Periods

The crankcase lubricating oil change periods for these engines have been carefully established for the purpose of protecting the service life of the engine as economically as possible.

Change the oil and filter elements after the first 10 service hours of operation of a reconditioned engine.

Change the oil and filter elements at least every six months.