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vibration. Common methods used to absorb this shock
are coiling the brake tubing or using a short length of
purchased brake hose. Follow procedures outlined
by the vehicle manufacturer or SAE specifications.
3. Connect the upstream line coming from the master
cylinder to the fluid inlet port on one end of the actua-
tor. Note that the actuator is not directional and does
not have a front and rear. Connect the downstream
line going to the rear brakes from the side outlet port
on the same end of the dual actuator. See Figure 19.
4. Repeat steps 1,2&3toinstall the front brake lines.
5. Determine the shape and length of a new piece of
tubing to connect the power unit and dual actuator.
6. Connect one end of the new tubing to the dual
actuator. See Figure 20.
7. Connect the other end of the new tubing to the power
unit. This connection can be made to either the side or
top port. Remove the plastic shipping plug from the
top port of the power unit. To install line in the side
port use 3/16" hex key wrench to move the steel plug
from side port to top port. Install the remaining brass
adapter from the fitting package in the selected port
prior to connecting the line. See Figure 21.
3 Channel Anti-Lock 691 Brake Lock
System
3 Channel Anti-lock Brake System
The 3-channel anti-lock brake system uses both a single
and a dual actuator. Follow the plumbing instructions for
both the Single 691 Brake Lock System and the Dual 691
Brake Lock System to connect the appropriate lines. To
connect the hydraulic line from the power unit to both
actuators, either a tee can be added to this line or the plug
in the unused port on the pressure switch manifold can be
removed to accommodate the connection.
4-Channel Anti-Lock 691 Brake
Lock System
The 4-channel anti-lock brake system uses two dual
actuators. Follow the plumbing instructions for the Dual
691 Brake Lock System to connect the appropriate lines.
To connect the hydraulic line from the power unit to both
actuators, either a tee can be added to this line or the plug
in the unused port on the pressure switch manifold can be
removed to accommodate the connection.
F
rom
Master Cylinder
(port not shown)
From
Master Cylinder
To
Brakes
To
Brakes
FIGURE 19
From
P
o
w
e
r
U
ni
t
Dual Brake Systems with 691 System
Plug One of
These Ports
FIGURE 21
FIGURE 20
3 Channel Anti-lock Brake System with 691 System
4 Channel Anti-lock Brake System
4 Channel Anti-lock Brake System with 691 System