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64 american 196 vert |
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rocklandrambler
AMC Addicted Joined: Feb/09/2013 Location: Nanuet, NY Status: Offline Points: 3953 |
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The wiper switch operates the cable attached to the wiper motor. There is no single or double. The fact that the wipers move at all shows the switch is working. Your problem is most likely the motor or the fuel pump. Probably both.
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Past AMC's
1974 Hornet X (new) 1975 Gremlin X (new) 1964 Classic 660 Cross Country 1965 American 440-H |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19689 |
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The motor will generally work on engine vacuum alone at idle/low speeds... or rather any time except when accelerating. Going up and not coming down indicates the valving inside on the flapper is bad. Going up slow indicates hardened grease and/or a bad flapper seal. So you need to send Peter Stathes the motor for rebuilding (www.amcrambler.com). After that you can worry about the booster fuel pump. If you rarely drive the car in bad weather you can use a large "juice can" vacuum reservoir instead of the booster pump. Wipers will slow whne pulling hard or accelerating, but sholdn't stop. The reservoir will give you 30-40 seconds of good wipers, so on a long uphill pull they may slow down considerably. Keep your foot off hte gas as much as possible so engine makes good vacuum and they should be adequate in a light rain. If you plan on driving the car in bad weather it's best to get the booster fuel pump rebuilt. Between the booster pump and wiper motor cost is about the same as converting to electric, but there is the labor/trouble of the conversion.
I think your car has a rotary switch. Obviously the cable is broken, or the gears at the switch stripped (most often due to a frozen cable). In a pinch you can use a choke cable with the end bent to connect to the wiper motor. Might be a good alternative until you find a replacement "switch". Mount in switch hole if there is enough clearance behind the dash or under dash. |
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Frank Swygert
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tamvette68
AMC Apprentice Joined: May/05/2011 Location: lafayette, loui Status: Offline Points: 141 |
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I'll pull the wiper motor and send to Peter Stathes as suggested. I don't plan on driving it in the rain but in south Louisiana you never know.
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tamvette68
AMC Apprentice Joined: May/05/2011 Location: lafayette, loui Status: Offline Points: 141 |
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tamvette68
AMC Apprentice Joined: May/05/2011 Location: lafayette, loui Status: Offline Points: 141 |
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In the bottom pic on the wiper motor there are two ports. The vacuum line was connected at the lower port. Someone said it needed to be on the upper port. I did that and that's when the wipers moved upward. What is connected to the lower port?
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rocklandrambler
AMC Addicted Joined: Feb/09/2013 Location: Nanuet, NY Status: Offline Points: 3953 |
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Nothing is connected to the lower port.
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Past AMC's
1974 Hornet X (new) 1975 Gremlin X (new) 1964 Classic 660 Cross Country 1965 American 440-H |
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tomj
AMC Addicted Joined: Jan/27/2010 Location: earth Status: Offline Points: 7553 |
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there should be (......) a little cotton or fiberglass plug, a simple air filter, up inside that bottom port. that's where air gets sucked in, that presses on the vane in the housing that does all the work. the technical service manual should have technical details.
it's an interesting little motor. the vane rocks back and forth, and at each end of it's stroke it slides a little nylon valve (a "SPDT switch") that shifts vacuum to the side that pulls it to the other... it's a bi-stable device, a vacuum operated flip-flop made out of pot metal and leather and grease. |
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1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
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tamvette68
AMC Apprentice Joined: May/05/2011 Location: lafayette, loui Status: Offline Points: 141 |
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im tempted to take it apart just to see. I'm pretty sure the switch itself is bad tho, but I haven't had time yet to test everything.
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tomj
AMC Addicted Joined: Jan/27/2010 Location: earth Status: Offline Points: 7553 |
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it's not a "switch". the whole thing is a pneumatic, bistable, analog machine. the knob on the dash turns a small gear, that pulls a rack attached to a cable. the cable runs to the wiper motor, and slides a rubber valve that proportionally lets in more, or less, restriction in the air flow ("vacuum" flow) that sucks the vane in the body of the pump. more open, it pulls faster, due to friction. when the vane pulls all the way to one side, a second plastic bi-stable valve is pressed, that directs the vacuum to the other side, again proportional to the cable-pull.
friction determines it's rate-of-change; and at 50 years old, there's a lot of friction! when it comes back from Peter Stathes the seals will seal again, the vane and valves and bi-stable shuttle will be lubricated, and friction will be at a minimum and it'll work great. and then the decline begins anew, and 20+ years later, it will need a rebuild again due to stiff lubricant. its actually a pretty cool system. |
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1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
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tamvette68
AMC Apprentice Joined: May/05/2011 Location: lafayette, loui Status: Offline Points: 141 |
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wow..forget about me taking it apart after reading tomj. that convinced me to send it to Stathes....thanks tomj
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