TM 9-2320-260-34-2
I
13-6. FRAME ALINEMENT INSPECTION (Contd)
d. Vertical Bow Inspection
NOTE
q For vertical bow inspection, the front 20 ft (6 m) of frame rail
(measured from front to rear) and the rear 20 ft (6 m) of frame
rail (measured horn rear to front) are measured separately.
This will cause an overlap in measurement.
Perform steps 1 through 3 for front 20 ft (6 m) of frame rails.
q
Stretch string on floor and position weight under bottom and at front of frame rail (2), pull string
1.
tight, and position weight at 20 ft (6 m) measurement.
Measure distance between string and bottom of frame rail (2) at the closest point to weights. Adjust
2.
string height until each measurement is the same and the entire length of string is unobstructed.
Measure distance between string and bottom of frame rail (2) near crossmembers (1) and as close to
3.
the midway point as possible. If frame rail (2) bows more than 0.125 in. (3 mm) up or down, frame
rail (2) is out of tolerance.
4.
Repeat steps 1 through 3 for rear 20 ft (6 m) of frame rails (2).
Remove wheel chocks (TM 9-2320-260-10) and release parking brake (TM 9-2320-260-10).
5.
NOTE
If frame rails are verified to be out of tolerance, notify your super-
visor. If frame rails are out of tolerance, truck will be classified as
unserviceable.
13-30
