TM 10-3930-671 -10 3-12.  MAIN FRAME INSPECTION. NOTE It is only necessary to remove those items which would prevent an accurate inspection of frame assembly.  To save time on removal and installation, inspect frame in sections.  Remember, much of the frame can be inspected from beneath truck. a. Check for dents or visible cracks in metal on frame (1) and counterweight (2). b. Check welds for visible cracks and damage on frame (1). c. Check screws and screw holes for irregular size and shape on frame (1) and counterweight (2). d. Check for excessive corrosion and wear on frame (1). e. Check for chipped paint. f. If faults are discovered, notify unit maintenance. 3-24