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TST-011

– Rev. 2013-049

Page 1 of 12

LEAK TEST

PROCEDURE

MRT4-DC LIFTERS

― SINGLE VACUUM SYSTEMS

TESTING AND MAINTENANCE MUST BE

DONE BY A QUALIFIED PERSON

KEEP FOR FUTURE REFERENCE

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Содержание MRT4-DC

Страница 1: ...TST 011 Rev 2013 049 Page 1 of 12 LEAK TEST PROCEDURE MRT4 DC LIFTERS SINGLE VACUUM SYSTEMS TESTING AND MAINTENANCE MUST BE DONE BY A QUALIFIED PERSON KEEP FOR FUTURE REFERENCE ...

Страница 2: ...TST 011 Rev 2013 049 Page 2 of 12 THIS PAGE INTENTIONALLY LEFT BLANK ...

Страница 3: ...d fittings and loose hoses at connection points If leakage is severe the cause is often a visibly damaged part Do not apply soapy water to fittings or vacuum hoses in an attempt to find leaks since it will only be drawn inside the vacuum system If the source of leakage is not immediately evident the various sections of the entire vacuum system must be systematically isolated and tested to determin...

Страница 4: ...um generating system from the pad system 4 Reconnect the battery and activate the vacuum generating system pull handle 2C of control valve out to apply position 5 Allow the vacuum system to reach a suitable vacuum level or to shut off automatically and with the valve handle 2C still pulled out in apply position disconnect the battery 6 Observe the vacuum gauge to locate the general area of leakage...

Страница 5: ...he valve reconnect the battery and activate the vacuum generating system pull handle of control valve out to the 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 close the ball valve turn handle perpendicular to valve and disconnect the battery 5 Observe the vacuum gauges on the ball ...

Страница 6: ...ith the valve handle still pulled out in apply position close the ball valve turn handle perpendicular to valve and disconnect the battery 6 Observe the vacuum gauges on the ball valve and lifter to locate the area of leakage If the vacuum level on the ball valve s vacuum gauge starts and continues to drop and the lifter s vacuum gauge holds steady this indicates that the leak is located in the ho...

Страница 7: ...d does not drop and the vacuum level on the lifter s vacuum gauge starts and continues to drop this indicates that the leak is located in the vacuum gauge assembly Inspect or replace the assembly If the vacuum level on the ball valve s vacuum gauge starts and continues to drop and the vacuum level on the lifter s vacuum gauge holds steady and does not drop this indicates that the leak is located i...

Страница 8: ... out in apply position disconnect the battery If the vacuum level on the vacuum gauge holds steady and does not drop this indicates the leakage is in one or more pads Reconnect one pad to its vacuum line and retest If indications of leakage resume replace that pad Continue testing until all pads have been reconnected and all defective pads have been replaced If the vacuum level on the vacuum gauge...

Страница 9: ...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 ...

Страница 10: ...ch 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...

Страница 11: ...aired reassemble all parts of the lifter A vacuum test as described in the instruction manual should be performed following any repair or service to a vacuum lifter All parts must be verified in relation to their function and the lifter must pass the vacuum test before returning to operation ...

Страница 12: ...esting always apply thread sealant Teflon tape or similar product to the male threads prior to reassembly in order to avoid vacuum leaks For plastic fittings use only Teflon tape liquid sealants must not be used because they may damage plastic parts 5 When assembling fittings do not over tighten After first applying adequate thread sealant or tape the fitting should be finger tightened as much as ...

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