excavator Posted April 3, 2016 Share Posted April 3, 2016 Hi guys I just picked up another old Mack a 1986 RD tandem dump. It has the 3 round style vent holes in air heater box and a single rocker switch in middle that was not hooked up to wires in rear of box. When I try plugging in wires I can get the ac to work but I also see the center cab vent outside of cab opens and I am trying to figure out how or why it opens and if it should. The outside vent on old r model has manual knob to crank open. This one has air line to it with electric switch also Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.