CONVERTO AIRBORNE DUMP TRAILER

REINFORCED COMBAT WHEEL

 

1.     The Converto Airborne Dump Trailer utilizes 2 each standard Willys MB Combat Wheel assemblies reinforced by welding two steel discs to the wheel assembly.  The combat wheel assemblies used for this modification are:

• Willys part number A-5467 (after truck serial number 120,700) (16 X 4.50) (from TM10-1186 w/Ch 1 dated July 1, 1943).

Converto part number 5000-1 (16 X 4.50) (from TM5-9084 dated May 31, 1943 and Supplement to TM5-9084 covering USA Registration numbers 0876861-0880860 and 0885489-0886688).

 

2.   The inner disc is constructed from .125” (1/8”) thick steel plate, measuring 12.0625” (12-1/16”) for the outside diameter and 8.40625” (8-13/32”) for the inside diameter.  This inner disc is welded onto the combat wheel assembly in 8 places on the outside diameter of the disc and in 5 places on the inside diameter of the disc.  The outside diameter welds should measure 1” - 1.125” (1” - 1-1/8”) long and be placed just below each combat wheel bolthole that joins the two halves of the wheel assembly.  The inside diameter welds should measure 1.25” (1-1/4”) long and be placed just above each lug nut hole.  See picture below:

 

 

3.   The outer disc is constructed from .125” (1/8”) thick steel plate, measuring 7.5” (7-1/2”) for the outside diameter and 4.46875” (4-15/32”) for the inside diameter.  This outer disc has 5 holes drilled through it for the lug studs on a 5.5” (5-1/2”) bolt circle. These holes are drilled 0.5625” (9/16”) in diameter and placed in a star pattern 72° degrees apart.  Each hole is chamfered 60° degrees.  This outer disc is welded onto the combat wheel assembly in 5 places on the outside diameter of the disc with the large opening of the chamfered holes facing outward and the lug nut holes aligned with the lug nut holes in the combat wheel assembly.  The outside diameter welds should measure 1.25” (1-1/4”) long and be placed just above each lug nut hole.