Re: R9 Overdrive

Posted by HH56 On 2012/7/27 11:22:50

With the knob pulled out-I think all this does is mechanically and electrically prevent the solenoid from energizing-at least that what it appears on the BW owners manual.

Correct -- Not sure exactly which manual you mean but the BW service manual on site is for the R11 and there are differences to the R9. R9 is covered in the Packard Econo-Drive manual.

Mechanically in the R9 the lockout moves a sleeve which slides into position preventing OD gearing operation. Electrically, the lockout switch opens preventing the governor from providing the ground to the relay.

Since you have voltage, I'd measure the solenoid terminals as a quick start. When wires are disconnected, there should be continuity to ground on both terminal 3 and 4. The number ID is stamped faintly on the case near the terminals. If 4 is open, that will prevent the solenoid from pulling in.