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Board index » All Posts (Owen_Dyneto)




Re: Windshield wipers not working
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Owen_Dyneto
You're really asking for a lot here! I'll try but keep it brief, maybe others will come along and elaborate. When you turn the dash knob, you're not turning the motor, you're opening a valve on the vacuum motor which admits vacuum to the motor to allow it to operate (oscillate) the motor paddle back and forth. The blades are moved by a cable and pulley arrangement attached under the dash to the motor output shaft. The dash knob operates the valve on the wiper motor via a small bowden-style cable.

The vacuum comes from the downward stroke of piston with both engine valves closed. The vacuum is required to pull gasoline from the carburetor. The openings in the carbs are small compared to the piston diameter and thus you create a vacuum, each piston in turn doing the same thing to maintain a more or less constant vacuum. Think of pulling the plunger down on a syringe; it creates a vacuum to permit liquid to be drawn in via the needle tip. . That manifold vacuum powers your wiper motor, the washer, the power brake booster, and regulates the distributor ignition timing at certain power situations.

Posted on: 2008/12/18 13:23
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Re: BigKev's 1954 Packard Clipper Deluxe Sedan
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Owen_Dyneto
Yes, I just checked the 48-54 parts book and agree. But did you notice that most if not all the other models 54 and back use different spring numbers for primary and secondary, and front and rear. Makes me wonder why the change.

Posted on: 2008/12/18 13:10
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Re: Windshield wipers not working
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Owen_Dyneto
Vacuum is measured with a vacuum gage and taking the reading from any convenient port on the intake system, manifold or carburetor base, but since on the V8 Packards there is a secondary vacuum source, the mechanical vacuum pump, you want to eliminate this as a source first. You can mount the gauge to the vacuum line that exits the base of carburetor and goes to the junction block near the wiper motor; just pull off the hose to the block and slip the gauge over the metal tube. Or you can remove the vacuum brake booster check valve and measure it there.

The wiper motor is a simple vacuum motor comprising a pivoting paddle; vacuum will draw the paddle to one end of it's travel which trips a valve which then admits the vacuum to the other side and draws it back. Pretty basic. If you need your wiper motor rebuilt, no one is better than Ficken out on Long Island. About $60 lsst time I looked.

Perhaps someone will recommend a good primer book on general automotive principles and repair for you to read. I grew up with Glenn's Auto Repair which is nothing short of superb, from basic principles to detailed overhaul. But it's been out of print for a long time. Motor's Manuals of the era can be useful but don't give much on principles and theory.

Posted on: 2008/12/18 11:32
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Re: My '56 Clipper
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Owen_Dyneto
Not a reliable estimate but an estimate none-the-less; you might count all the 56 Clippers in the PAC and PI directories, correcting for the fact that some owners will appear in both, and then perhaps doubling the number. The PAC directory shows about 90 56 Clippers, though not all may be on the road. Not a great preservation rate, considering about 20,230 made and compared for example to 1934 with only about 8000 made but 225 or so surviving.

Best 56 survival rate is probably the Caribbean convertible with 276 made and more than 90 known survivors and probably a few more lurking in garages, etc.

Posted on: 2008/12/18 11:15
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Re: BigKev's 1954 Packard Clipper Deluxe Sedan
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Owen_Dyneto
I'm a bit leary that it will function properly as shown. The spring above the self-adjuster is typically "bowed" just a bit over the notchwheel, so I believe that ideally the spring should be a bit shorter and mounted to the lower hole. When I ran into this on a Bendix mechanical brake job, I just took the old spring to the local brake shop which matched it very closely to a current part.

I also see that both the primary and secondary shoe return springs seem to be identical which normally isn't so. Usually in order to get the "servo" action, the primary shoe requires a weaker spring so that it contacts the drum first and then applies greater force to the secondary shoe. This is why the primary lining is either shorter or of a different composition than the secondary shoe, though we often have to do without that these days.

Posted on: 2008/12/18 10:33
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Re: 1951 Packard/Starting Problem
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Owen_Dyneto
Without knowing what wiring was removed that you had to reassemble, I'd suggest that it's often easiest in the long run to go back to basics. Have someone crank the engine with the starter while you observe the direction the rotor rotates (CW or CCW). Then remove at least #1 spark plug, use your finger over the hole, and put #1 piston at TDC on the compression stroke. Then check the points, they should either be just opening or on the verge of opening, either will be enough to get the engine started and you can fine-tune the timing later. Then note the position of the metal end of the rotor to see which tower of the distributor cap it is under, and that becomes the high tension lead to #1 plug. Then simply install the others in order (1-6-2-5-8-3-7-4) following around the cap in the direction of rotor rotation. Assuming everything else is OK and you have current to the coil, it should start.

Posted on: 2008/12/18 10:30
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Re: Mal's '41 120 Coupe
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Owen_Dyneto
Looking at that headlight bucket spring (which perhaps was made by opening a coil or two in a single long spring?) makes me thing about the art of making your own tension springs. I'd think this is nearly a lost skill among today's restorers. Just curious, has anyone here actually wound their own tension springs?

Places like Century Spring (good site to Google and bookmark) offer millions of springs, but if you're adventuresome or need one you can't find, it's kind of rewarding to make your own. You basically make a wooden mandrel from dowel stock, buy the correct size spring wire, wind on a lathe at low speed with considerable tension on the wire feed, an then remove and heat-treat.

Posted on: 2008/12/18 10:03
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Re: Windshield wipers not working
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Owen_Dyneto
I had noted earlier in a post on my 56 Caribbean that I was only observing about 14-15 inches of vacuum at idle. But subsequently, rebuilt carburetors and a very thorough tuneup got that up to about 19.5 inches. This a 90,000 mile engine. On high speed (not the reduced arc) my vacuum wipers are at least as fast as the electrics on my new Lincoln, and faster than you would almost ever need except in a monsoon rainstorm. Yes, they slow down but almost inperceptibly when you give it the throttle but are still quite fast. I used Mobil Vaccum Pump oil to lubricate the motor.

Posted on: 2008/12/18 9:46
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Re: Packard Darrin Sport Sedan in Hemmings Classic Car
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Owen_Dyneto
Sent you a PM with some details.

Posted on: 2008/12/17 10:14
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Re: Packard Darrin Sport Sedan in Hemmings Classic Car
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Owen_Dyneto
"Production" ??? They're both one-offs.

Yeah, of course you're right, just my lousy word choice. I was trying to convey that they both differed from the prototype. The article is in the current issue of Hemmings Classic Car, volume 5, issue 5, marked #53 on cover with a Nash Metropolitan pictured.

Posted on: 2008/12/17 9:27
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