PUMP & MTG GP-MAIN HYDRAULIC 4368773 - Caterpillar

Illustration 13 g02828537
The arrow indicates material velocity reading
Use the Auto Cal function and follow the screen prompts in order to finish the calibration.Note: The material velocity should read approximately 5387 m/s (0.2121 in ./us).
Illustration 14 g02829878
Typical view of couplant in repaired area
Inspect suspect material.
Place a small amount of couplant in the area that has been ground for crack removal.
Move transducer in a raster pattern in order to find the lowest thickness. Mark the area and record the minimum thickness on the wheel surface.
Measure and inspect the thickness of suspect material. The minimum thickness of the component under inspection must be greater than the dimensions shown in Illustration 8 and Illustration 9.Note: The minimum radius must be maintained in order for the component to be salvaged.Inspection Procedure with the Wheel Removed from the Machine
ReferenceDisassembly and Assembly, RENR2037, "797 Off-Highway Truck Front Wheel, Bearing, and Duo-Cone Seal - Remove - Horizontal"ReferenceDisassembly and Assembly, RENR2588, "797B Off-Highway TruckFront Wheel, Bearing, and Duo-Cone Seal - Remove - Horizontal "This procedure provides operating and calibration instructions for the GE/Krautkramer DSM2 Ultrasonic Thickness Gauge. This instrument is used to gauge the thickness of ductile iron castings.Note: Personnel performing the Ultrasonic (UT) inspections must be at least Level I Certified Technician as defined by ASNT-TC-1A. Personnel must be trained by a Level II or Level III technician in order to perform the procedures and rejection criteria. The instrument is a pulse echo type thickness gauge. A 2.25 MHZ 0.5 inch diameter straight beam dual element transducer is used. Couplant must be used to permit the transmission of the acoustic energy from the search unit into the component that is to be inspected. The current couplant used is Sonoclear Grade 60.
Clean the surface of each area to be tested. The surface of each area tested must be free from dirt, rust, loose paint, or any material that could interfere with sound propagation.
Illustration 15 g02828460
Typical view caliper measurement of wheel flange thickness
Use calipers to measure the outside machined flange. This measurement is the manual thickness measurement. Use the manual thickness measurement in order to conduct a one point thickness calibration.
Illustration 16 g02828537
The arrow indicates material velocity reading
Use the Auto Cal function and follow the screen prompts in order to finish the calibration.Note: The material velocity should read approximately 5387 m/s (0.2121 in ./us).
Illustration 17 g02829878
Typical view of couplant in repaired area
Inspect suspect material.
Place a small amount of couplant in the area that has been ground for crack removal.
Move the transducer in a raster pattern in order to find the lowest thickness. Mark the area and record the minimum thickness on the wheel surface.
Measure and inspect the thickness of suspect material. The minimum thickness of the component under inspection must be greater than the dimensions shown in Illustration 8 and Illustration 9.Note: The minimum radius must be maintained in order for the component to be salvaged.
Illustration 18 g02830258
Typical view of using large calipers for measurement
Large calipers can be used where access of ultrasonic equipment is not possible. The use of calipers is only possible