TST-011
– Rev. 2013-049
Page 10 of 12
FIGURE 8
With the ball valve in the
open position (handle in line
with the valve) reconnect the
battery and activate the
vacuum generating system
(pull handle of control valve
out to apply position).
Allow the vacuum system to
reach a suitable vacuum level
or to shut off automatically
and, with the valve handle
still pulled out in apply
position, close the ball valve
(turn handle perpendicular to
the valve) and disconnect the
battery.
If the vacuum gauge on the
ball valve holds steady and
the vacuum gauge on the
lifter starts and continues to drop, this indicates the leakage is in the coiled hose.
Replace the coiled hose.
If the vacuum on the ball valve starts and continues to drop and the vacuum gauge on the
lifter holds steady, this indicates the pad fitting leaks. Replace the pad fitting.
Repeat this process for the remaining coiled hose assemblies that were determined to leak
until all leaks are located and repaired.
[
for lifters with straight black hose (no coiled hoses)
]
1) Remove the pad fitting (
8A
) from the hose and, using a short piece of hose, attach the fitting to
the end of the ball valve with the vacuum gauge and attach the other end of the ball valve
assembly to the black hose that the fitting was removed from. See
FIGURE 8
above.
2) With the ball valve in the open position (handle in line with the valve) reconnect the battery and
activate the vacuum generating system (pull handle of control valve out to apply position).
Allow the vacuum system to reach a suitable vacuum level or to shut off automatically and, with
the valve handle still pulled out in apply position, close the ball valve (turn handle perpendicular
to the valve) and disconnect the battery.
Any pad fitting that leaks will be indicated by a loss in vacuum on the ball valve’s vacuum
gauge. Test each pad fitting in this manner, replacing any that leak.
If all 4 pad fittings pass vacuum test, the indication is that the leak is located in the internal
hoses or fittings. It is recommended that a drawing of the internal hose routing be obtained
prior to proceeding further.
Please contact Wood’s Powr Grip Co. for additional assistance.
Individual hoses and fittings can be tested by using the ball valve assembly and plugs in the same
manner as the pad fittings were shown being tested in
FIGURE 8
.
Continue until all fittings and lines are tested or the leak is located.
8A