TST-011
– Rev. 2013-049
Page 9 of 12
FIGURE 7
[
for lifters with coiled red poly hose to vacuum pads
]
1) Remove the hose clip
covering the hose coupling
(
7A
) that joins each of the 4
coiled hoses from the vacuum
pads to the internal straight
hoses.
2) Cap all the coupler fittings, to
seal off the vacuum lines.
3) Activate the vacuum
generating system (pull
handle of control valve out to
apply position).
4) 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,
disconnect the battery.
If the vacuum level on the
lifter’s vacuum gauge holds steady and does not drop, this
indicates the internal hoses and fittings do not leak and that the leak is in one or more of the
pad fittings or the coiled hose. Proceed to step 5 to test these parts.
If, with all the couplings capped off, the vacuum level on the vacuum gauge starts and
continues to drop, the indication is that the leak exists in the internal hose sections.
If this is the case, 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.
5) If it was determined that the leak is in one or more of the pad fittings or the coiled hose, reattach
one section of coiled hose to its corresponding coupling, cap off the pad fitting and retest. Refer
to
FIGURE 6
but reconnect only one section of coiled hose to a hose coupler at a time.
If, after adding back one section of coiled hose, the vacuum level on the
lifter’s vacuum
gauge holds steady and does not drop, this indicates that neither the hose or pad fitting in
the reattached assembly leak and this assembly can be left attached. Continue adding
sections of coiled hose with fitting (one at a time) until all leaks are located.
If, after adding back one section of coiled hose, the vacuum level on the vacuum gauge
starts and continues to drop, this indicates that either the coiled hose or pad fitting of the
reattached assembly leak. In this circumstance remove the pad fitting (
8A
) from the coiled
hose and, using a short piece of hose, attach the pad fitting to the end of the ball valve with
the vacuum gauge. Attach the other end of the ball valve assembly to the coiled hose that
the fitting was removed from. See
FIGURE 8
.
7A
