10. MODIFICATION PROCEDURE FOR M870 BRAKE (BENDIX) (Continued).
Install Air Reservoir Mounting Brackets, PN 112472, and New Air Reservoir Assembly, PN 109379.
(1) Locate main frame crossmember (1) on inside of semitrailer mainframe rails (2) behind rear axle (3) as shown.
(2) From mainframe crossmember (1), measure 4-7/8-inches forward and 2-3/4-inches up from the top of
mainframe lower flange (4). Mark location using suitable scribe and center punch.
(3) From marked location, and on the same vertical line as shown, measure forward 2-1/4-inches and mark second
location using suitable scribe and center punch.
(4) Repeat this procedure for opposite side of semitrailer.