GASKET KIT 6V6364 - Caterpillar

"Ball Stud - Inspect"
If the ultrasonic test indicates a damaged ball stud, replace the ball stud.
Table 1
Recommended Tooling     Krautkramer Branson USN 52 or equivalent    
Recommended Training     Personnel that perform this procedure need training. Personnel must demonstrate sufficient skill in the ultrasonic testing of ball studs without direct guidance.    Note: Use a known damaged ball stud and a new ball stud as baselines.
Illustration 1 g00873753
Typical Ball Stud (5) Correct surface for test
Table 2
Critical Dimensions of Ball Studs    
Sales Model    Pt. No. of Ball Stud    A    B    C    
768     6D-9908    
161.05 mm (6.340 inch)    
149.0 mm (5.87 inch)    
111.8 mm (4.40 inch)    
769
771     193-4624    
161.05 mm (6.340 inch)    
149.0 mm (5.87 inch)    
111.8 mm (4.40 inch)    
772
773
775
776
777     7D-1292    
168.15 mm (6.620 inch)    
155.4 mm (6.12 inch)    
120.9 mm (4.76 inch)    
Remove the lockring and the cover from the top of the steering cylinder. Remove all grease from the top of the ball stud. A clean surface ensures a good seal with the transducer.
Illustration 2 g00843601
(1) Gel compound (2) CRT screen (3) Krautkramer Branson USN 52 (4) Transducer
Apply standard gel compound to the transducer and to the end of the ball stud. This will ensure proper contact with the transducer.
Use a straight beam transducer that is rated for 2.25 MHz to 5 MHz. The diameter of the transducer should measure 12.7 mm (0.5 inch) to 25.4 mm (1.0 inch).
Apply the transducer to surface (5) of the ball stud.
Set the screen range to a reading of 200 mm (7.9 inch). Set the reflected signal to the eighth grid mark on the CRT screen. The reading for the thickness should be approximately dimension (A). The crosshole will cause an interruption at dimension (B). The machined end will produce another indication at dimension (C). Adjust the reflected signal for each ball stud to 100 percent of the screen height. This will ensure that the surface that is set to the eighth grid mark is the opposite end of the ball stud.
Set the gate at 20 percent of the screen height.
Start the gate at 30.0 mm (1.18 inch). Set the width of the gate to a reading of 75 mm (2.95 inch).
Illustration 3 g00854800
(C) Interruptions that are in this area will appear between 0 and dimension (C).
Slowly move the transducer over all surfaces of the end of the ball stud.Note: An interruption from approximately 0 to dimension (C) on the CRT screen indicates a damaged ball stud. A complete loss of the reflected signal may also indicate a damaged ball stud.
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 taken