Hudson 63 1936, Руководство по механическим процедурам

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MECHANICAL PROCEDURE MANUAL
SECTION 14
Page 15
Printed in U. S. A. ISSUED MAY, 1937
depressed, fluid is forced from the master cylinder into M
through the valve seat P and out N to the wheel cylinders,
applying the brakes.
Had the clutch pedal been depressed before the brake pedal,
the parts would have been in the position shown in Figure 1414.
Here the cage B is seated on the valve seat P so that the brake
fluid would force the ball C away from the seat X and the fluid
would pass around the cage and out N to apply the brakes.
Now with the brakes applied and the clutch pedal depressed
(it makes no difference which occurred first), the foot can be
removed from the brake pedal and the fluid still will be retained
in the wheel cylinders, since the cage B is on its seat P and the
ball C blocks the return through the cage valve X.
When the clutch pedal is released, the cage B is moved to the
left (forward) by the rotation of the camshaft D so that the fluid
is free to return to the master cylinder from N to P to M as shown
in Figure 1413.
It should be noted that the ball C is free to roll in the cage B.
When the car is heading upgrade, the ball will always roll to the
back against the seat X and operation will be as previously
described. If the car is heading down-hill, the ball will roll to the
front of the cage so that the passage will always be open and the
brakes will not remain applied so that the device does not
function during the normal operation of the car except to prevent
roll back when starting on an upgrade.
Service Operations
There are only two major adjustments on this device.
1. Proper leveling of unit. This is important to insure the ball C
being on its seat at the back of cage B when the car is head-
ing upgrade and off its seat when heading down-grade. The
proper position will also insure the ball rolling forward
when the brakes are applied when the car is moving forward.
2. Proper rod adjustment to time the application and release of
the unit with clutch engagement and disengagement.
Removal from Car
1. Disconnect wheel cylinder lines from Hill Hold unit.
2. Loosen lock nut A (Figure 1415) and turn sleeve B until it is
screwed off rod E.
3. Remove bolt C (Figure 1415) and remove unit from car.
To Disassemble Unit
1. Before removing lever H, center punch shaft and lever to aid
in reassembly.
2. Loosen lock screw in lever H and remove lever.
3. Remove head J gasket K and spring I.
4. Remove camshaft plug G. Camshaft D and spring F may
then be removed.
5. Remove ball cage B and ball C.
Before reassembling clean and inspect all parts, particu-
larly the valve seat X in the cage.
To Reassemble Unit
1. Insert the ball cage B, being sure the two large ball rails
are on the under side of the camshaft D.
2. Insert spring F in camshaft D and insert both in housing.
Be sure the spring F remains in place in the shaft.
3. Install plug G.
4. Replace lever H being sure it is in the same position on
the camshaft D and pointing downward.
5. Place a new gasket K on head J and put spring I in head
and install in body.
Installation on Car
The entire installation of the Hill Hold device must be
made with the car resting on a level floor.
1. Put unit in place and insert bolt C (Figure 1415) drawing
snug but not tight.
2. Bolt D should also be snug but not tight to permit leveling
of the unit.
3. Place a piece of .052" feeler stock on boss R and lay a
small spirit level on the stock and boss S as shown in
Figure 1415.
4. Turn unit on bolt D until the bubble is in zero position on
the level and tighten bolt D securely. Remove level and
shim stock.
5. Place the level crosswise on boss R and shift the unit
around bolt C until the unit is level. Tighten bolt C
securely and remove level.
Brake Lines
1. Reinstall brake lines to Hill Hold unit.
2. Fill Master Cylinder Reservoir and bleed lines at all four
wheel cylinders (see Section 14, Page 9).