Re: Continuing on the Overdrive

Posted by HH56 On 2009/8/25 22:46:31

The only reference I'm aware of is the Econodrive training manualhttps://www.packardinfo.com/xoops/html/downloads/EconoDriveTrainingBook.pdf which you probably have. The section on electrical operation gives a breakdown of what each component does but nothing on point to point like the electromatic book gave you. There may be a service letter with a few snippets but nothing really detailed.

Part of the problem with checking electrical point to point is the car has to be in motion to see if OD actually works. When sitting, you can ground the governor and listen for solenoid and then push accelerator or move the lockout lever to see if it releases, but that's about it. Even that might not help because if OD is not in a mechanical position to accept full travel of solenoid pawl, any further checks that relied on full engagement might not be valid. It is also not a good idea to keep R9 solenoid sitting part way with pull in winding energized for a long period that the tests might take because of the possibility of overheating it.