TM 5-3805-260-24
29.
To check the tooth contact setting between the
bevel gear and pinion after the gear clearance
(backlash) and the bearing preload adjustments
have been made, use the following procedure:
a)
Put small amount of prussian blue, red lead
or paint on be el gear teeth. Turn pinion and
check marks made on bevel gear teeth.
b)
With no load, correct tooth contact setting
will be as shown. The area of contact starts
near toe of gear and goes about 30% up the
length of tooth. With this setting when load is
put on gear, it will be over the correct area of
teeth.
c)If bevel pinion shaft is too far away from
bevel gear, short toe contact will result as
shown. The teeth of pinion will be in contact
with toe ends of convex faces (part that
makes a curve toward the outside), and top
edge of heel end of concave faces (part that
makes a curve toward the inside). To correct
this, move pinion shaft toward gear by a
decrease of shim thickness between pinion
cage and carrier. After this is done, check
gear clearance (backlash) and tooth contact
again.
3-244
