SECTION V. WELDED REPAIRS

TB 9-2300-247-40

plate repair methods are used (paragraph ),

5/8 inch diameter drilled holes may be

Washers. Washers shall be new, case

required for the bolted connections.

hardened steel type. Washers shall be

provided under all bolt heads and under all

18.

Bolting Materials.

locknuts to adequately distribute over the

maximum bearing surface area of the

connection.

Bolts.

No. 8, carbon steel, UNF,

conforming to SAE (TBD)

Nuts. Steel, self-locking, UNF, MS51922.

SECTION V. WELDED REPAIRS

specific vehicle TM for the vehicle frame proposed for

CAUTION

repair.

Welding is not an approved or

20.

5-Ton Series Vehicle. Welding of 5-ton series

acceptable alternate method of repair

vehicle heat-treated steel frames shall be by the electric

for any riveted or bolted attachment

arc method and shall be limited to the use electrodes

(e.g., crossmember, spring hanger,

conforming to MIL-312 of the American Welding Society

etc.) on the frame assembly of the

(AWS), AWS-A5 in sizes of 3/32 -in., 1/8- in., and 5/32-

CUCV series vehicles.

in, diameters as applicable. In cases where it becomes

necessary to weld two reinforcing members which are

19.

3/4 Ton to 2-1/2 Ton Series Vehicles.

adjacent to a heat-treated member, a small spacer will

The electric arc welding method is recommended when

be positioned and secured between the members to

welding is used to repair frames of in the 3/4, 1-1/4 to 2-

prevent the transfer of heat generated by welding to and

1/2-ton series classification. With this welding method,

from penetrating into the heat-treated members.

heat generated during welding is localized and burning of

Specific welding instructions for 5-ton series vehicle

the materials is kept to a minimum. Finished welds may

frames are contained in paragraph.

be ground, filed, and drilled as necessary. When

available, welding electrodes conforming to MIL-E-7018,

21.

Flaseplating. Unless otherwise stated herein,

Class 1 should be used with the electric arc welding

only hot or cold-rolled steel plate will be used for

during repair of these frames. When these electrodes

flaseplating. Material used for flaseplating shall, in all

are not available, refer to TM 9-237 for an acceptable

cases, be equal to the thickness of the plate or vehicle

substitute. Prepare sketches of the proposed repair, in

framing member requiring repair. Where necessary, a

accordance with standard shop practices, in accordance

tolerance of plus or minus 1/16-inch of the required

with sketches from the appropriate vehicle TM or as

thickness will be acceptable. The length of the material

shown in Chapter 3 of this manual.

When the

used for flaseplating will be determined by the type and

reinforcement has been shaped as shown in the

location of the break to be repaired. In all cases

sketches and clamped into position, apply welds only at

however, a flaseplate reinforcing member should extend

the points shown on the sketches. Generally, welding is

far enough on all sides of the break in the framing

not recommended at the extreme corners of a channel

member to reflect standard acceptable mechanical

framing member or its flanges. Welding at these

practices and that strength of the reinforcement is, at a

locations tend to encourage the development of new

minimum, equal to the original strength and serviceability

cracks in these locations. For specific welding repairs

of the frame.

for 3/4, 1-1/4 to 2-1/2 ton vehicle frames, refer to the