Figure 3-13.Types of grease guns.
grease guns for different types of fittings. See figure
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
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.
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.