Cracked Frame Repair Limits

TB 9-2300-247-40

Figure 1. Cracked Frame Repair Limits.

face of the rail (see Figure 2, crack limit

11.

Serviceability Standards. The proposed repair

gage fabrication).

will return the vehicle frame to a condition where frame

strength and serviceability, after repair, is equivalent to

that of the original frame. An example of this condition

would be where welding a crack in a frame side rail

without space for dishplating; This will not restore the

frame to its comparable original strength, therefore the

repair would not be authorized.

12.

Repair Facilities, Equipment and Personnel.

Where there exists at the proposed repair facility the

suitable equipment and skilled personnel to adequately

perform the required work. This is important since poor

frame repair can result in related additional failures and

possible danger to personnel and damage to equipment.

13.

Frame Alinement Tolerances. Measurements

to determine acceptable frame alinement must fall within

the tolerances specified in the vehicle technical manual

(TM) for frame to be repaired. If a vehicle frame

Figure 2. Crack Limit Gage

proposed for repair meets the required tolerances, it may

be considered repairable. However, a cost estimate

Cracks in frame lower rail flange with a

must still be prepared to determine if the proposed

radius extending past the lowest rivet hole

repairs are economically justified.

of the bogie support casting, 2-1/2-inches

or more in (Figure 3).

14.

Cracked Frame Repair Limits. Cracks in

frames progressing to within 5/32-inch of a tangent line

When three or more cracks in a single

or radius (Figure 1) can be repaired by a reinforcing

frame rail member are found.

technique described in Chapter 4.

When two or more cracks are found in a

48-inch proximity of one another and in the

15.

Frame Defects

same frame rail, including two cracks in the

same frame rail which are diametrically

Not Repairable. Defects in frames of 5-

opposite one another.

Ton series trucks and larger, showing the

following defects, will not be repair.

16.

Vehicle Component Removal. Under normal

conditions, removal, of vehicle components to provide

Cracks across the frame top rail flange

extending beyond 1-1/2 inches down the