TST-019 MRTALPCH CHANNEL
– Rev. 2016-310
Page 13 of 20
39) Disconnect the two hoses, one red and one
green, from the Y-fitting that connect to the
vacuum tanks, taking care to not damage the
fitting barbs. Examine the barbs of the Y-fitting to
determine if there are any large nicks in the barbs
that could allow a hose to leak. If the barbs are
not damaged, cap off the barbs as shown in
FIGURE 18
.
40) 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.
41) Close the ball valve (turn handle perpendicular to the valve), switch the power to off
( )
and
observe the vacuum gauge of the ball valve.
If the vacuum level,
as shown on the ball valve’s vacuum gauge, starts and continues to
drop, the indication is that the Y-fitting leaks. Replace the Y-fitting. Reconnect the hoses
and confirm by repeating the test shown in
FIGURE 7
. If the leak continues, proceed to next
step to test the individual tank lines.
If the vacuum level of the ball valve’s vacuum gauge holds steady and does not drop, the
indication is that one or both of the hoses connected to the vacuum tanks is the cause of the
leak. Proceed as follows.
42) Remove one of the caps from either barb of the Y-fitting and reconnect one tank line.
FIGURE 19
shows how to test either the red or green tank lines.
43) 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.
FIGURE 19
FIGURE 18
