TST-019 MRTALPCH CHANNEL
– Rev. 2016-310
Page 6 of 20
4) Remove the ball valve from the solenoid. Using a piece of 1/4" O.D.
hose, cap off the end of the hose to create a fitting plug, as shown in the
picture at right. Use the capped hose to cap off the port of the solenoid
that connected the filter. See picture for how to create the fitting plug and
FIGURE 5
for how used.
Note, the yellow caps shown at right can be used to create a fitting plug
for any fitting using hose sizes 1/4" O.D. and smaller.
5) The capped port of the solenoid is item
5A
.
This is the port that was connected to the filter.
Disconnect the 1/4" o.d. hose (
5B
) from the
solenoid of the affected circuit that connects to
the vacuum tank assembly. The red hose
shown (
5B
), loops around the battery and back
to the vacuum tank assembly on the left; the
blue/green circuit is more direct. Connect the
end of the ball valve without the vacuum gauge
to the hose from the vacuum tank. Using an
additional piece of hose, connect the end of
the ball valve with the vacuum gauge to the
port (
5C
) of the solenoid assembly.
See
FIGURE 5
.
6) 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.
7) 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 on the ball valve’s vacuum gauge holds steady and does not drop, the
indication is that the check valve, located on the vacuum tank assembly, or the connecting
hose, is the cause of the leak.
Check the ends and overall condition of the hose connected to the tank assembly. If
needed, cut approximately 1/8" [3 mm] from each end, ensuring that the cuts are straight
and square.
If there are no visible problems with the hose, remove the tank assembly of the affected
circuit (blue/green or red) and check the fittings for any indications of damage. If neither the
hose nor fittings appear to be the cause, replace the check valve.
If the vacuum level on the
ball valve’s vacuum gauge starts and continues to drop, this
indicates that the solenoid assembly is the cause of the leak. Remove the solenoid
assembly of the affected circuit (blue/green or red) and check the fittings for any indications
of damage. If the fittings do not appear to be the cause, replace the solenoid valve.
8) Once all leaks, for both the red and blue/green circuit, have been located and repaired,
reassemble the vacuum generating system. If needed, repeat the preliminary test, where the
ba
ll valve was attach to each circuit’s filter, to confirm that the vacuum generating system no
longer leaks.
5A
5C
FIGURE 5
5B
