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Page Title:
Defect. Cracks in lower flange of frame rail and liner at the bogie support. |
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 TB 9-2300-247-40
opposite end of the crossmember attached as
57.
Defect. Cracks in lower flange of frame rail
shown in Figure 44.
and liner at the bogie support.
c.
Fabricate doubler plate as shown in Figures 42,
a. Sketches. Prepare sketches to design specific
repair requirements as require and/or as shown
NOTE
in this section.
In all cases where crossmembers are
WARNING
removed for repair of a crack, a
Use Only effective chip guarding
portion of the crack in the
equipment, protective equipment and
crossmember must be cut at the end
protective clothing (goggles, shields,
where the crack appears in the rail as
gloves aprons, etc) when doing any
shown in Figure 40. This will allow
drilling, grinding, or welding. Failure
the crossmember to be reinstalled
to follow this warning could result in
and joined to the doubler plate.
injury to personnel.
d. Cut the cracked end of the crossmember to fit
the doubler plate.
b. Cut outside edge 1/2-inch from the outer edge
and parallel to the bogie support rib.
e. Weld the crossmember to the doubler plate in
the ground out groove as shown in Figures 44,
c.
Grind the entire edge to a rounded finish in order
to reduce crack sensitive conditions.
methods of doubler construction and repairs to
the defective areas of the crossmember.
d. Fabricate doubler plate as shown in Figures 42
and 43, and as described in paragraph.
f.
Place doubler inside rail and locate centrally in
relationship to the crossmember.
e. Using C-clamps, insure that frame rails are in
alinement and in close contact with the doublers
g. Clamp doubler securely to member with C-
and repair as shown in Figures 42 and 43.
clamps and drill the necessary bolt holes in the
rail face.
f.
Thoroughly clean repaired
surfaces
and
surrounding area of repair.
h. Bolt doubler plate securely with new No. 8 bolts,
washers, and locknuts.
Torque bolts in
g. Prime and paint repair area and surrounding
accordance with appendix E of the appropriate
surfaces as specified in T-43-0139.
vehicle TM.
58.
Defect. Cracks in crossmembers at the rear
i.
Bevel the doubler edge which is directly opposite
of vehicle cab.
the crossmember to a 45 angle.
a. Sketches. Prepare sketches to design specific
j.
Weld the doubler to the frame in the ground out
repair requirements as requires and/or as shown
groove created during doubler fabrication as
in this section.
shown.
WARNING
k.
Thoroughly clean repaired
surfaces
and
surrounding area of repair.
Use Only effective chip guarding
equipment, protective equipment and
l.
Prime and paint repair area and surrounding
protective clothing (goggles, shields,
surfaces as specified in TM-43-0139.
gloves aprons, etc) when doing any
drilling, grinding, or welding. Failure
59.
Defect. Cracks in the rear bogie area top
to follow this warning could result in
flange rail that require cutouts of portions of the
injury to personnel.
trapezoid plate to accept the doubler flange
b. Remove rivets attaching the rail at the cracked
a. Sketches. Prepare sketches to design specific
end as described in Chapter 1. Leave the
repair requirements as required and/or as shown
in this section.
38
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