Packard Forum Index » ZIS, ZIL, and other Packard Cousins!

Alas, I have no Chaika's to need parts for (but could find room for one if it came my way) but the instruments for the GAZ 13 sure looks like they would be at home in my Caribbean.

Looks very similar to a number of good old US of A type horns although the adjust nuts may be a bit different. Maybe we stole their design...

but to me this is a bit close to the bone

I'd guess you feel about the same about that as I do when I see a nice bona-fide 30s V12 classic with a Chevy crate motor, tilt steering wheel, Turbohydramatic, AC, and power windows.

Quote:
Dave,

I never would have guessed!

Excellent explanation. It shows why I'm seriously considering replacing the leaky, patched, Electro-hydraulic system on my '41 Packard limo with either modern 12 volt "hotrod" electric units, 6 volt Ford units or as a last resort, manual crank regulators. The pump unit under the floor weighs as much as a starter motor.

One minor clarification for the postwar Packard systems. The pump only turns one direction and supplies pressure. To lower a window or move the seat back, the pump does not operate--just the solenoid valve opens and spring tension pulls the window down and fluid returns. To raise or move the seat forward the valve opens and pump operates simultaneously. To open or close the top, the pump operates for both motions but there is a reversing valve to direct the fluid properly. Gerd is correct on the other point--it's impossible to raise and lower a window at the same time. Believe prewars work the same but not entirely sure-- although they have very different parts so the fluid may get sucked out of those if the pump runs when lowering.

Attach file:

---

  (27.48 KB)


  (17.39 KB)

As far as opening the windows is concerned, the pre-war principal is the same... the valve opens, the spring pulls the window open and the hydraulic fluid returns to the storage tank... the pump does not run. That's why when the system starts to leak, the windows slowly open and the rain pours in. Goodbye real wood veneer window garnish! Also, they used brake fluid in the system. You can imagine what the paint looks like after a leak in the door.

I'll try to get a photo of the '41 pump and storage tank tomorrow.

Here's the picture of the '41 hydraulic window pump and the tank. The pump alone weighs more than 17 pounds.

Attach file:

---

  (11.04 KB)

The Packard also used a gear type pump but at about double the pressure if I did the conversion right. 200-250 PSI. The prewar tops were vacuum but post war all were hydraulic. Windows and seats too until 54. 55-56 the top used the reversible pump motor and electric motors for rest. Picture shows the type gear pump used. Packard used mostly the Dura pump rather than Moraine but essentially same workings.

I had the brake fluid setup in a 54 Pacific and sympathize about the leaks. Have read that some have converted to trans fluid or power steering fluid to eliminate that problem.

Attach file:

---

  (33.82 KB)

Gerd,

Here's a plate from the parts manual that shows the whole setup (less the additional complexity needed for the limo divider window). Interestingly, the '41 does not have a 'master' control for the driver/chauffeur only a single switch for the driver window.

Here's a link to a Wikipedia article on Power Windows that might be of interest.

http://en.wikipedia.org/wiki/Power_windows

Attach file:

---

  (118.72 KB)