2-22. REAR AXLE (M916 THRU M920).
See illustration in paragraph 2-21 for
identification and description of common
components. For organizational mainten-
ance purposes, the basic difference between
the axles shown in paragraphs 2-21 and 2-22
is that the axle shown below does not have
an oil filter. Quantity and placement of fill
and drain plugs also differ from one config-
uration to the other.
AXLE SHAFT. Transmits power from the differential gear assembly to the hub assembly inside
of axle housing.
HUB AND DRUM ASSEMBLY. Serves as mount for rear wheels. Houses the brake shoe assem-
blies which can be mechanically forced against it to slow or stop the vehicle.
FILLER PLUG. A plug used to gain access for inspecting oil level and replenishing oil supply.
INTER-AXLE PROPELLER SHAFT. Transmits power for forward-rear to rear-rear axle.
DIFFERENTIAL LOCKUP CHAMBER. Air actuated by lockup switch located in cab interior.
(Refer to para 2-14 for description.)
BRAKE AIR CHAMBER. (Refer to para 2-64 for description.)
PINION YOKE. Connects to propeller shaft from power transfer case.
DIFFERENTIAL INTERNAL LUBRICATION PUMP. Circulates gear lubricant under pressure
thru differential gears.
DRAIN PLUG. A magnetic plug which allows draining oil at service intervals. Also, draws metal-
lic particles from the oil.
BREATHER. Allows fumes from hot oil to escape.