MIL-T-62145 Trucks: Elevating Body, Diesel And Gasoline Engine Driven, 21,000 To 39,500 Pounds Gvw, 4X2 And 6X4, CommercialThis specification covers diesel and gasoline engine driven four-wheel, two-rear-wheel drive, and six-wheel, four-rear-wheel drive vehicles having minimum gross vehicle weights GVW of 21,000 to 39,500 pounds, for normal operating conditions. The vehicles are commercial trucks equipped with stake and platform or van bodies, capable of elevating the body and cargo to a specified height for loading and unloading the cargo into and out of aircraft. The vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in acquisition documents.

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MIL-T-62145E

the metal being welded. All critical arc welds shall be magnetic particle or dye penetrant inspected prior to painting. The following defects shall not be acceptable:

(a) Welds which are ground flush with the metal

(b) Slug or plug welding

(c) Undersize of fillet welds, overlaps, inadequate fusion and penetration, undercutting of weldments and vertical down welding

(d) Unremoved slag and spatter

(e) Cracks

(f) Porosity.

Weld penetration shall be such as to provide transference of maximum design stress through the base metal juncture. Intermittent welding shall be permissible when in accordance with 3.8.1 and 3.8.2.

3.8.1 Welding procedures. The welding procedure shall be recorded prior to production of any weldment, but no procedure qualification other than workmanship specimens shall be required.

3.8.2 Factors. The factors listed below, which are applicable, shall be included in the recorded welding procedure:

(a) Joint sketch

(b) Joint type and preparation

(d) Filler metal, size and type

(e) Position of welding

(f) Arc-voltage, current range, and polarity

(g) Manual or machine

(h) Travel speed, machine only

(i) Pre-heat and post-heat

(j) Welding process

(k) Shielding gas

(l) Method of cleaning.

3.8.3 Workmanship specimens. Workmanship specimens shall be prepared by the manufacturer for the body, hoist, subframe, and components to simulate all welding conditions. The specimens shall represent the minimum acceptable weld quality to be used in production. Upon submittal of these specimens by the contractor, the quality level and identification shall be subject to approval by the Government. The specimens shall be prepared using the welding procedures to be employed in production. Specimens prepared to represent multiple pass welds shall be made in such a manner as to leave at least two inches of each layer of weld metal exposed. Approval specimens shall be retained at the contractor's plant.