TST-019 MRTALPCH CHANNEL
– Rev. 2016-310
Page 3 of 20
PRELIMINARY TEST
This test determines whether leakage is located in the vacuum generating system or the pad
system.
This test should be performed if, during the overall test, the lifter’s vacuum gauges
indicated a leak sufficient to warrant repair. 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: Since the vacuum tanks are part of the pad system, any leakage will appear to be faster than
seen in the overall test, due to the reduced system volume.
1) Remove the 4 screws (
1A
) that attach the valve
cover (
1B
) to the channel. Note, there are no
components attached to this cover, so it can be
removed and set aside.
2) This will expose the 2 filters (
2A
) shown in
FIGURE 2
.
S
3) Since the vacuum gauges are connected to the pad system, it will be necessary to use a ball
valve with vacuum gauge, fitted with an adapter for the push-in hose, as shown below, to
perform the following test. Also, when using a single ball valve assembly, if, during the overall
test of the lifter, it was determined that both circuits (red and blue/green) leak, you will have to
test each circuit individually.
FIGURE 2
2A
FIGURE 1
1B
1A
Содержание MRTALPCH611LDC
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