TM 9-2320-361-34
13-3. FRAME ALINEMENT INSPECTION
(Contd)
NOTE
Ensure plumb bob is placed toward front of truck on both right and
left grease fittings. If not, inaccurate measurement of frame
squareness will result.
7. Place string over grease fitting (2) on left front spring shackle (1) with plumb bob toward front of
truck. Lower plumb bob and locate a point on paper below spring shackle (1).
NOTE
Do not make mark on paper until plumb bob has stopped swinging
and is close to, but not touching, paper.
8. Carefully mark spot (3) on paper directly below plumb bob point.
9. Measure distance between left side plumb bob mark (3) and string on floor (4). If distance is more
than 1/4 in. (6 mm), frame rails (5) are out of tolerance.
NOTE
●
If measured frame rails are out of tolerance, notify supervisor. If
frame rails are verified to be out of tolerance, truck will be
classified as unserviceable.
●
At end of inspection, remove plumb bob and string.
13- 8