TM-9-2320-361-24-2 Field Maintenance Manual Volume 2 for M44A2 Series Trucks
Page 80 of 1144
TM 9-2320-361-24-2 0206 00 0206 00-4 FRAME ALIGNMENT INSPECTION (Contd) HORIZONTAL BOW INSPECTION (Contd) NOTE Strings used for horizontal bow measurement will remain in place until the frame squareness procedure is completed. On frames longer than 20 ft (6 m), the two front and rear strings will be used. 5. Stretch string tightly on floor (5) between front and rear plumb bob marks (2) under each frame rail (1). Place weights on string to keep it taut or tie ends of string to jack stands. NOTE • For frame rail sections with added fishplate, subtract 5/16 in. (7.94 mm) from plumb bob marks to compensate for the fishplate added to frame rail. • If measured frame rails are out of tolerance, notify supervisor. If frame rails are verified to be out of tolerance, vehicle will be classified as unserviceable. 6. Measure distance between string and each plumb bob mark (2). If distance is more than 1/2 in. (13 mm) from bow (3), or 1/2 in. (13 mm) from bow (4), frame rails (1) are out of tolerance.