TM 9-2320-260-34-2
13-6. FRAME ALINEMENT INSPECTION
THIS TASK COVERS:
c. Frame Squareness
a. Frame Leveling
d. Vertical Bow Inspection
b. Horizontal Bow Inspection
INITIAL SETUP
PERSONNEL REQUIRED
APPLICABLE MODELS
All
Two
REFERENCES (TM)
TOOLS
TM 9-2320-260-10
General mechanic's tool kit
TM 9-2320-260-20
(Appendix B, Item 1)
TM 9-2320-260-34P-1
Tape measure (Appendix B, Item 133)
Plumb bob (Appendix B, Item 134)
EQUIPMENT CONDITION
Vehicle undercarriage clean and free of mud
Hydraulic jack
and debris.
Wheel chocks
Tires checked for proper air pressure
MATERIALS/PARTS
(TM 9-2320-260-10).
Tape, masking (Appendix C, Item 52)
Twine (Appendix C, Item 54)
NOTE
Frame alinement inspection is the same for vehicles with six,
seven, eight, or nine frame crossmembers. This procedure covers
frame alinement inspection on a vehicle with six crossmembers.
Loose or missing crossmember rivets, loose or broken cross-
members, or damaged frame rails must be repaired prior to
inspection.
Ensure inspection procedure is performed on a flat, level surface.
Assistant will help with entire procedure.
I
a. Frame Leveling
1. Drive truck into inspection position from a 12 fl. (3.7 m) straight line of travel. Apply parking brake
(TM 9-2320-260-10) and chock wheels (TM 9-2320-260-10).
2. Using tape measure, determine distance from floor to bottom of frame rails (1) in front of cross-
member (2). If one frame rail (1) is lower, use hydraulic jack and raise one side of front axle to level
frame rails (1) to within 0.125 in. (3 mm) of each other.
3. Using tape measure, determine distance from floor to bottom of rear frame rails (1) at cross-
member (3). If one frame rail (1) is lower, use hydraulic jack and raise one side of rear-rear axle
to adjust frame rails (1) to within 0.125 in. (3 mm) of each other.
I
b. Horizontal Bow Inspection
NOTE
For horizontal bow inspection, the front 20 ft. (6 m) of frame rail
(measured fron front to rear) and the rear 20 ft (6 m) of frame rail
(measured from rear to front) are measured separately, This will
cause an overlap in measurement.
1. Tape one 8 x 10.5 in. (20 x 27 cm) sheet of white paper to floor under each end of frame cross-
member (4) and in front of crossmembers (3) and (2) where attached to frame rails (1).
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