Re: 1940 windshield wiper motor questions

Posted by 39SixSedanMan On 2011/5/10 7:29:35

Okay, West, Okay...I'll talk. I have installed the 1940 junior wiper motor in a 39 junior, but not a 1940 Senior, although I think the cowl and linkages are so similar that it could be done. Although Packard provided the dual action fuel pump to improve the vacuum based wiper system, and mine was performing relatively well, I had the opportunity to buy a 40 Jr. system and decided to go for it. In general, I want authenticity, but will concede if for safety and drivability improvements.

The quick summary of parts needed:
1) Motor assembly (includes cam relay that controls the wiper park position)
2) wiper transmissions: electric include push/pull rods that go up into the transmissions whereas the vacuum type use the familiar chain link style.
3) On/Off Switch: 40 had only On and Off
4) simple bracket: yes, it was custom, but nothing more than a strip of 18 gauge sheet metal bent accordingly
5) small washers to use as shims

More detail
The original vacuum motor uses a different mount than the electric, whose motor has an integral three point mounting plate. Although the mounts were different, one of the holes of the electric mount lines up perfectly with one of the original holes. The simple bracket was used to hold the motor relative the the body dash structure, which required an 1/8" hole (not visible). The adjustment of the wiper connecting rods is simple and the system works extremely well. The system was put into service on its maiden voyage and I am quite pleased with it.

I'll try to dig up the photos and post them here.
I hope this helps,
Pat