Lubrication Fittings

Common Military Lubricants and Their Use

Aviation Structural Mechanic (H&S) 3&2 - How airplanes are built and how to maintain them
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Figure 3-13.—Types of grease guns. grease guns for different types of fittings. See figure 3-13. OIL/SQUIRT CAN.—The oil/squirt cans are used for general lubrication. Always use the specified oil for the part being lubricated. Before using an oilcan, always check to make sure the oil can contains the proper lubricant. HAND.—This method of lubrication is generally used for packing wheel bearings. It involves using grease in the palm of your hand to pack the bearings. BRUSH.–This method of lubrication is used when it is necessary to cover a large area, or for coating tracks or guides with a lubricant. Lubrication Fittings There are several different types of grease fittings. They are the hydraulic (Zerk fitting), the buttonhead pin, and flush type of fittings. See figure 3-14. The two most commonly used fittings in naval aviation are the hydraulic- and flush-type fittings. These fittings are found on many parts of the aircraft. HYDRAULIC FITTINGS.—This type protrudes from the surface into which it is screwed, and it has a rounded end that the mating nozzle of the grease gun grips. A spring-loaded ball acts as a check valve. Figure 3-14 shows across-sectional view of a straight hydraulic Figure 3-14.—Types of lubrication fittings. 3-24

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