TST-019 MRTALPCH CHANNEL
– Rev. 2016-310
Page 12 of 20
FIGURE 16
If the vacuum level
of the ball valve’s vacuum gauge now holds steady and does not drop,
the indication is that the leak to the vacuum tanks has been repaired. Once all identified
leaks have been repaired, proceed to System Confirmation.
If the vacuum level, as shown on the ball valve’s vacuum gauge, starts and continues to
drop, this indicates that the leak in the vacuum tank connections still exists. Proceed as
follows.
34) Remove the ball valve from the pump solenoid and reconnect the
tank hose to the solenoid.
35) Remove the hose from the Y-fitting that connects to the pump
solenoid, leaving the tank lines connected.
Note: Use caution when removing a hose from the Y-fitting shown
in
FIGURE 16
. These fittings have only a single barb on each hose
connection. Remove the hose carefully so as not to damage the
single barb of the fitting.
36) Using an additional piece of hose, connect
the end of the ball valve with the vacuum
gauge to the Y-fitting. Connect the other end
of the ball valve to the hose connected to the
pump solenoid. See
FIGURE 17
.
37) With the ball valve in the open position
(handle in line with the valve), switch the
power on
( )
, and activate the vacuum
generating system by pressing the apply
( )
push button.
38) Close the ball valve (turn handle
perpendicular to the valve), switch the power to off
(
)
and observe the vacuum gauge of the
ball valve to determine the area of the leak.
If the vacuum level, as shown on the ball valve, holds steady and does not drop, the
indication is that the hose from the pump solenoid leaks. Replace the hose from the Y-
fitting to the pump solenoid. Repeating the test shown in
FIGURE 7
can be used to confirm
that the leak is repaired.
If the vacuum level, as shown on the ball valve, starts and continues to drop, this indicates
that the leak is located between the Y-fitting and the tank connections. Proceed as follows.
FIGURE 17
