From the beginning of production through September 1928, a front bumper could have been ordered as factory optional equipment. Beginning in October 1928, a front bumper was standard equipment.
The front bumper and bumper arms were the same as for the A chassis through December 1929.
Front bumpers use for AA’s with body types 76-A open cab, 82-A Closed Cab, and 85-A Panel Delivery from January through June of 1930 could have had either the 1929 or 1930 style A chassis front bumper. The A chassis 1930 style front bumper was used from June through October 1930 for AA’s with body types 76-B open cab, 82-B Closed Cab, and 85-B Panel Delivery.
From January through October 1930, AA front bumper arms AA-17754-B RH and AA-17775-B LH were used as shown in the photograph to the left. These arms were designed to place the bumper clamps about 3” closer together allowing either 1929 or 1930 A chassis bumpers to be used.
Note – The AA double bar front bumper was released for use on a few trucks through October 1930 beginning after the conversion to the 1930-1931 body types.
All front bumper arms used A chassis arm to frame installation hardware (including bumper arm studs used with 1930-1931 radiator splash aprons).
The AA single bar front bumper was used from November 1930 to production end except as otherwise noted below for the AA double bar front bumper. The arms to back bar were attached with two bolts, nuts, lock washers. The bumper, arms and back bar were a dipped, gloss black enamel finish. The A-21219-S4 1/2″-20 x 1-1/4″ hex head bolts were raven finish and painted black. The A-21845-S1 1/2″-20 (7/16 x 3/4″) nuts and lock washers were black paint finished.
Photographs yet to come???????????
The AA double bar front bumper was released for use on a few trucks through October 1930 beginning after the conversion to the 1930-1931 body types. This AA bumper was again used, beginning in early 1931, for body types 270-A, 275-A, 280-A, 285-A, 290-A, and 300-A as optional equipment. These body types may have either the single or double bar bumpers.