M983 Tractor Operating Procedures (Cont)
Connect plug (8) on intervehicular wiring harness (5) to trailer
Connect red airhose to EMERGENCY coupling (10) on trailer and
connect blue airhose to SERVICE coupling (11) on trailer.
Push in TRAILER AIR SUPPLY control knob (12).
If tractor is used to pull an XM860A1 trailer, the rear
mud flaps with mounting arms must be removed or
damage to flaps and/or mounting arms may result. To
remove mud flaps with mounting arms, do steps (18.1)
(18.1) Remove two pins (12.1) and remove access ladder (12.21 from
walkway grating (12.3).