ADAPTER 6V6151 - Caterpillar

Use a 2.25 MHz - 5Mhz straight beam transducer. The diameter of the transducer should measure 12.7 mm (0.5 inch) to 25.4 mm (1.0 inch). The area of concern is dimension (B) for this type of defect.
Apply standard gel compound to the transducer and to the end of the ball stud. This will ensure proper contact with the transducer.
Apply the transducer to the threaded end of the ball stud.
Use the range key to move the reflected signal to "9" on the CRT screen. Keep the signal at "9" on the CRT screen. Adjust the reflected signal for each ball stud to 100 percent of the screen height. Adjust the reflected signal once per ball stud. This will ensure that the surface is the opposite end of the ball stud and that the surface is not the bottom of the drilled holes.Note: Drilled holes will reflect a signal.
Set the gate at 20 percent of the screen height.
Illustration 3 g00843670
(B) Interruptions that are in this area will appear between the 0 grid mark and the 6.4 grid mark. (C) Interruptions that are in this area will appear between the 8 grid mark and the 9 grid mark. (G) Interruptions that are in this area will appear between the 6.5 grid mark and the 8 grid mark. (H) Cracks that are in this area CAN NOT be detected.
Slowly move the transducer over all surfaces of the end of the ball stud.Note: An indication from approximately 0 to 6.4 grid marks on the CRT screen indicates a damaged ball stud. A complete loss of the reflected signal may also indicate a damaged ball stud.Note: A complete loss of back wall CAN be a indication of a possible damaged ball stud.Note: A partial loss of the back wall with a small indication between the 0 grid marks and the 6.4 grid marks, which is less than 20% of the screen height, can be an indication of a damaged ball stud.Note: The area of concern (B) should occur approximately between 0 grid marks and 6.4 grid marks on the CRT screen. Reflected signals from the drilled holes should occur approximately between 8 grid marks and 9 grid marks on the CRT screen.Note: Although the ultrasonic beam spreads slightly, cracks that are in Area (H) CAN NOT be detected.
Identify the ball stud as an acceptable ball stud or as a damaged ball stud.
Document the following information.
Date of inspection
Serial number of the inspected truck
Part number of the inspected ball studs
Number of inspected ball studs
Number of ball studs that were damaged per truck
Initial of operator that performed the inspection
Any corrective action that was takenIf you find any questionable indications then the ball studs need to be removed and verified with Magnaflux. If the use of Magnaflux indicates that the ball stud is free of indications, the ball stud may be returned to service. The ball stud can only be returned to service if there is more than 50% of the service life remaining. If the ball stud is