TM 9-2320-260-34-2
13-6. FRAME ALINEMENT INSPECTION (Contd)
NOTE
Two front-to-rear strings used for horizontal bow measurement
will remain in place until task c, frame squareness, is complete.
5. Stretch string tightly on floor between front and rear plumb bob marks (2) under each frame
rail (1). Place weights on string to keep taut.
NOTE
For frame rail sections with added fishplate, subtract 0.31 in,
(7.9 mm) from plumb bob marks to compensate for fishplate added
to frame rail.
6. Measure distance between string and each plumb bob mark (2). If distance is more than 0.5 in.
(13 mm), frame rails (1) are out of tolerance.
7. Repeat steps 1 through 6 for rear 20 ft (6 m) of frame rail.
NOTE
If frame rails are verified to be out of tolerance, notify your
supervisor. If frame rails are out of tolerance, truck will be
classified as unserviceable.
13-26
