WPG MRTALPCH611LDC, Процедура испытаний

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TST-019 MRTALPCH CHANNEL
– Rev. 2016-310
Page 5 of 20
VACUUM GENERATING SYSTEM TEST
Note: The following assumes that you have access to suitable plugs, a ball valve with vacuum
gauge, and additional hose and adapter fittings for connecting the ball valve to the lifter’s vacuum
lines and fittings.
Note: If you are testing only one of the two circuits, the lifter will need to be attached to a clean,
smooth surface for the remaining section to seal to during testing.
The most likely leak points in the vacuum generating system are the check valve, the hose
connections to the filters, the control valve or vacuum tank/check valve assembly. Leave the filter
disconnected and test these items as follows:
Isolate the filter from the control valve / check valve assembly:
1) Remove the ball valve from the filter.
Disconnect the 1/4" o.d. hose (
4A
) from
the port ( 4B ) of the solenoid valve that
connects to the filter. Connect the end
of the ball valve with the vacuum gauge
to this port of the solenoid valve. See
FIGURE 4 .
2) With the ball valve in the closed position
(handle turned perpendicular to the
valve), switch the power on
( )
, and
activate the vacuum generating system by pressing the apply
( )
push button.
3) 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 filter is the source of the leak.
Verify that the O-ring seal of the filter cap is in good shape, that the cap is tight and that the
filter housing is clean. Check the filter and the ends of the hose attached to the filter. Cut
approximately 1/8" [3 mm] from the ends of the hoses, ensuring that the cuts are straight
and square. Reattach the hoses to the filter in the same manner as done in the Preliminary
Test and retest the lifter as shown in the Preliminary Test. If the lifter continues to leak,
replace the filter and or hoses.
Note: When the filter is installed in its holder, it is critical that the hoses be positioned so
that there is minimum sideways pressure on the filter hose.

If the vacuum level on the ball valve’s vacuum gauge starts and continues to drop, the
indication is that the leak is located in either the solenoid valve assembly or the check valve.
Proceed to next step.
FIGURE 4
4A
4B