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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
c.
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
d.
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.
e.
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
a.
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
b.
Cracks across the frame top rail flange
extending beyond 1-1/2 inches down the
4

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