Re: Overdrive wiring issue
Posted by HH56 On 2019/4/2 21:25:06
Quote:
R9s are powered all the time so relay will energize whenever the governor or the wire from the governor provides a ground. That was one of the problems with R9s and the reverse lockup issue. If something happened to the governor or the wire from it was shorted the OD solenoid would activate. If reverse was selected while the solenoid is engaged the OD planetary and overrunning clutch fight each other and can lock up so the car won't move. Adding more power to try to make the car move in that condition usually resulted in OD damage. As a preventative on postwar cars, Packard added a reverse safety switch in the 6v input wire to the relay so when reverse was selected the power to the OD was cut and solenoid was forced to drop out if it had accidentally engaged. The switch could be added to prewar cars if the OD was one which was known to have had the issue and the customer wanted to buy it. The R11 is completely different mechanically and electrically and relay coil is powered by the ign switch. When the key is off on an R11 the relay and solenoid will not energize.
The screw you moved also provides one of the contacts of the switch. Moving it pushes against the switch mechanism and will also affect calibration just as the normal adjustment screw does. I think your governor back is probably identical because the one I posted photos of has the OD portion of the contact broken off due to whatever reason. The OD contact would normally have one end rest against the adjustment screw and attaches to the piece of brass sort of sitting by itself on the other.
Here is the governor with the OD contact sitting where it should be and lifted off to see the movable portion of the switch which rests under it. The screw you moved is directly below the movable piece.
Attach file:
(66.95 KB)
(62.58 KB)
One thing I noted today. When I ground the OD at the governor, I get the solenoid triggering when the key is OFF as well as when it is ON. Shouldn't this only work when the key is in the ON position?
R9s are powered all the time so relay will energize whenever the governor or the wire from the governor provides a ground. That was one of the problems with R9s and the reverse lockup issue. If something happened to the governor or the wire from it was shorted the OD solenoid would activate. If reverse was selected while the solenoid is engaged the OD planetary and overrunning clutch fight each other and can lock up so the car won't move. Adding more power to try to make the car move in that condition usually resulted in OD damage. As a preventative on postwar cars, Packard added a reverse safety switch in the 6v input wire to the relay so when reverse was selected the power to the OD was cut and solenoid was forced to drop out if it had accidentally engaged. The switch could be added to prewar cars if the OD was one which was known to have had the issue and the customer wanted to buy it. The R11 is completely different mechanically and electrically and relay coil is powered by the ign switch. When the key is off on an R11 the relay and solenoid will not energize.
The screw you moved also provides one of the contacts of the switch. Moving it pushes against the switch mechanism and will also affect calibration just as the normal adjustment screw does. I think your governor back is probably identical because the one I posted photos of has the OD portion of the contact broken off due to whatever reason. The OD contact would normally have one end rest against the adjustment screw and attaches to the piece of brass sort of sitting by itself on the other.
Here is the governor with the OD contact sitting where it should be and lifted off to see the movable portion of the switch which rests under it. The screw you moved is directly below the movable piece.
Attach file:
(66.95 KB)
(62.58 KB)
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=210631