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7032 SOUTH 196th - KENT, WA. 98032 - (206) 872-0141 / FAX (206) 872-8710
MODEL 50/75 AUGER
OPERATION / MAINTENANCE MANUAL
B
A
The APE Model 50/75
motor has low sensitivity to variations in pressure, temperature and viscosity. This charac-
teristic is due to the plat distribution design. The roller and camtrack principle provides a high mechanical efficiency
and allows high torque output in reduced overall dimensions.Smoothness of rotation is due to the balance of the
motor, the high number of strokes (48 to 160 per rotation) the constant displacement linked to the sinusoidal
camtrack profile and the high efficiencies. This smoothness remains excellent at very low speed (under 1 rpm).
With an even number of pistons and lobes, the internal forces of the motor are balanced, allowing the bearings to
be totally available for taking the external loads.
I. GENERAL INFORMATION (Continued...)
I-3B. Model 50/75 Auger Motor
5
3
2
1
4
First piston position:
To start the cycle, oil is fed under pres-
sure to the valve assembly, passes
through it and pushes the piston. Moved
by the pressure, the roller pushes down
on the cam lobe and causes the cylinder
block to rotate.
Second piston position:
As the piston descends, supply pressure
passes through a maximum opening, then
diminishes.
Third Piston position:
When the piston reaches the bottom of
the lobe, the oil supply is cut off. Drive
power stops. This is neutral position. An-
other piston must take over from the first
one and make it climb the following lobe.
Forth piston position:
When the piston starts its climb, oil can
escape to the reservoir through a port
being opened in the valve assembly. This
is the beginning of the discharge cycle.
Fifth piston position:
A piston continues its climb, port in the
valve assembly progressively enlarges,
then a progressive closing of the dis-
charge hole takes place.When it has
reached the top of the lobe (neutral posi-
tion), the piston well repeat the previous
cycle. The direction of rotation of the mo-
tor can be changed by reversing the in-
put of the supply.
Dual displacement:
In order to create a “gear box” function,
and increase speed of rotation, a
selector valve cuts oil supply to five of
the ten pistons, thus creating twice the
speed with the same flow of oil.
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Page 1-5
Figure 1-D. General Description of the Auger Motor