TM 55-203
t.
Dome Steps and Dome Platforms. No
see that the general condition of the part to be repaired
welding
permitted, except for restoring original weld.
is not due to defective material or weak design,
conditions which are often evidenced by the existence
u.
Draft Lugs, Cast- or Forged-Steel.
No
of previously made welds. Such parts should not be
restrictions.
repaired.
v.
Equalizers, Truck. No welding of cracks or
20-5. Limitations on Reclamation
fractures permitted
Specific limitations on reclamation by either electric or
w.
Grabirons. No welding permitted.
oxyacetylene welding are as follows:
x.
Hanger, Brake Beam. Cracks and fractures
a.
Axles, Solid. No welding permitted.
must not be welded.
Building up worn eyes is
permissible.
b.
Bolsters, Cast Steel, Grade B. Welding
cracks or fractures from the end to within 12 inches of
y.
Hanger, Spring or Bolster.
Crack or
the center plate (as shown in AAR Interchange Manual)
fractures must not be welded. Worn areas may be built
is permissible, providing crack or fracture does not
up provided material remaining in part is not less than
extend more than forty percent through the cross-
80 percent of the original section. Must be normalized
sectional area of the casting. Welding cracks outside of
after welding.
this area is prohibited. Bolster must be removed from
z.
Hanger Bracket, Brake Beam. Cracks or
car before welding and normalized after welding.
fractures may be welded. Normalizing is required, if
c.
Bolsters, Cast Steel, Grade C and High
weld is located closer than 1 inch from inside flange of
Tensile Steel. Welding limitations as discussed above,
side frame. Brake hanger brackets may be renewed or
except that castings shall be uniformly preheated to a
other types substituted by welding. Normalizing is
temperature of between 300 F and 6000 F and the
required, if weld is located closer than 1 inch from inside
welding shall be accomplished while the casting is
flange of side frame.
Building up worn holes is
maintained at a temperature of above 3000 F.
permissible.
d.
Bolsters, Pressed- or Structural-Steel. No
aa. Heads, Brake Beams, Cast Steel.
No
restrictions.
restrictions.
e.
Braces, Body. No restrictions
ab. Journal Boxes (Not Integral), Cast Steel. No
restrictions.
f.
Brake Beam Tension Members. No welding
of cracks or fractures or building up permitted.
ac. Journal Boxes (Not Integral), Malleable or
Cast Iron. No welding permitted.
g.
Brake Steps Metal. No welding permitted
except for restoring original construction weld.
ad. Ladders and Supports.
No welding
permitted.
h.
Carlines. No restrictions.
i.
Center Plates, Malleable Iron. Must be
be welded Holes may be built up provided material
removed and be bronze welded.
remaining in part is not less than 80 percent of the
j.
Center Plates, Cast or Forged Steel. No
original section.
restrictions. If removed from car, it is recommended
af.
Plates, End or Side. No restrictions.
part be stress-relieved after welding.
ag. Posts, End, Side, or Door. No restrictions.
k.
Check Plates, Follow.
No welding
permitted when section is broken out between key slots.
ah. Reservoirs, Auxiliary and Emergency
Airbrake, Cast Iron.
No welding of body portion
l.
Couplers, Rigid Shank Lengths. May be
permitted. Worn holes in lugs may be built up, and lugs
restored by welding.
fractured or broken off beyond 1/2 inch from body may
m.
Couplers, Swivel Shank, Lengths. May be
be reclaimed by bronze welding.
restored by welding. Must be normalized after welding.
ai.
Running Boards, Metal (Steel) (Except Tank
n.
Cars). Running board sections must be removed from
welding. Must be normalized after welding.
car for welding repairs.
o.
Coupler Draft Keys. No welding permitted.
(1)
Longitudinal running board between
p.
Coupler Knuckles, High Tensile. Worn
the end running board saddles-welding of cracks and
surfaces may be built up by welding.
fractures permitted up to 50 percent of sectional area of
complete section.
q.
Coupler Knuckles, Grade B. No welding
permitted.
(2)
Longitudinal running boards extending
beyond the ends of car-no welding permitted except to
r.
Coupler Pins. No welding permitted.
restore original construction weld.
s.
Coupler Yokes, Horizontal, Forged Steel.
No welding permitted.
20-3
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