1915-07-01 Marmon 41, Info Book, 1534-B wm

Front Axle is a heavy "I" beam drop forging having a large
clevis at each end. The steering knuckle supporting the front
wheel bearings comes between the arms of this clevis which, with
the king bolt, forms a vertical hinge or pivot on which the wheels
move in changing the direction of the car. The thrust due to the
weight of the car is borne by a large tapered roller bearing. The
Figure 23. Left steering knuckle and front wheel bearings.
cross rod connecting the two knuckles has large devises. Adjustable
stops are provided to limit the motion of the steering.
An extremely high degree of safety is maintained throughout the
construction, which will require no attention but lubrication for
thousands of miles of normal travel.
To remove the steering knuckle, jack up the axle, disconnect
the cross rod and the reach rod, take out taper pin "A" (Fig. 23),
remove cotter and nut "B," lift out king pin "C." In reassembling
turn up nut "B" only far enough to prevent slight end play
in the king pin. Otherwise it will bind the bearing.
Front Wheels are supported by two roller bearings, one on
either end of the steering knuckle arm. The hub forms a greasepacked
housing, providing lubrication.
To remove the front wheel while leaving the steering knuckle
in place, first take out screws "G" to free grease retainer "F."
Remove the hub cap, cotter and nut "H," and washer "J." By
working the wheel back and forth with an outward pressure,
bearing "D" will come off its spindle, freeing-the wheel.
58
Adjusting Wheel Bearings. In replacing, pack with grease
and turn up nut "H" until the wheel binds, revolving the wheel a
few times to take up back lash. Then relieve one-fourth turn to
give 1 he bearings proper clearance. Test by seeing that the wheel
runs free. With the proper adjustment by grasping opposite
spokes in a vertical line and pushing on one and pulling on the
other, play will be barely perceptible. When you have the adjustment
just right lock the nut and replace cap.
Rear System,
The rear axle housing construction
follows the Marmon
precedent, having two pressed
steel sections welded together.
It performs the important function
of supporting the load on
the rear wheels, carrying the
driving members (bevel gears,
differential and axle shaft) in a
bath of grease, and also carries
the brakes. It is made up as a
complete 'unit with these parts,
and may be removed if desired
by disconnecting the torque bar,
the flange at the rear universal,
brake rods, shock absorbers, rebound
straps and springs. Further
disassembling of driving
units, adjustment of brakes or
wheel bearings may now be done
as directed elsewhere.
, N451""
*pa
Torque Bar,
As power from the motor
tends to make the rear wheels
Figure 24. Vertical section through
revolve, the axle housing naturally
tends to revolve in the
wheel bearings.
rear wheel. Showing brakes and
opposite direction. The long
"torque" arm takes care of this "torque," or tendency to revolve.
It does not take any driving or side sway stress, as these
are efficiently cared for by the springs, as described on page 56.
A long pin or swivel at the rear end joins the torque bar to the
axle housing, rigidly for vertical or rotary motion, but flexible
sidewise. The ball which terminates the forward end of the
torque bar is carried in a vertical tube which contains cups above
and below held against the ball by powerful coil springs. This
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