Vacuum Wipers Help ?? - Reply to Topic
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Topic Review (Newest First)

  • 16-12-2012, 21:11
    dw nova
    Thanks Peter
    Followed your instructions and have wipers !!!! But the smoke was unbelievable a neighbour came to see if the garage was on fire !

    Thanks again you are a star

    Dave
  • 14-12-2012, 01:31
    Peter.
    On the underside of the vacuum motor there is a air intake port. Attach a length of hose to this port and place the other end into a container of regular DOT3 brake fluid. Start engine and turn on wipers. Let the engine suck about 1/4 pint of the fluid through the motor into the engine. Keep the windshield lubricated with a spray of water. You may have to manually aid the wipers for the first couple of strokes. If the motor is savable this will do it. If not you will have to replace it. WARNING... Engine will smoke profusely for about 15 minutes.
  • 13-12-2012, 20:46
    JC.
    When we had a stock pop earlier in the year, I found if you just let off the throttle momentarliy it was enough to get them accross the screen at high (sic) speeds.
  • 13-12-2012, 20:10
    Motorama
    I had one on a 55 Cadillac early part of the year, took it apart and cleaned all the crap that gets sucked in to it, wiped a bit of ATF inside it to help the paddle run smoother and put it back together, worked very well after that. There is a place, near New York i think, that rebuilds them but its worth giving it a clean out first as more often than not its all they need.
  • 13-12-2012, 18:40
    dw nova
    Quote Originally Posted by scooder View Post
    What 50's Ford is it? Does it have a vacuum pump on the bottom of the fuel pump? I've had a bunch of vac wiper stuff, and if it has the vac pump, if this pump is there and working, they work well. Dont stop when you floor it, or go up hills, as the pump takes over when the inlet vac stops. You should be able to manualy move the wipers through there full travel, with the engine off. If they dont or get tight, youll need to investigate why. If the pipes on the vac pump (if fitted) are the wrong way round, this can make them stop half way through there travel. Try pulling the pipe off the wipermotor and spray some WD40 in the motor throught the hole, and work the wipers to and frow. This can unstick the valve in side, aswell as making the wipers work better. The hiss under the dash does point to a stuck valve, so give the spray a go, see if it fixes them.
    Martin.
    Thanks Martin
    The line runs from the inlet to what must be the pump on top of the fuel pump then to the wiper motor, tried switching round the lines and had nothing so they must be the right way round
    the hoses from the engine bay to the wiper motor seem brittle so will replace them tomorrow and give the wd40 a go.

    Would like to stay original if possible as the car is totally stock and very nice


    Thanks to everyone for the advise

    Dave
  • 13-12-2012, 16:28
    john w
    I know some Pops use a vaccum storage tank which is replenished off the inlet manifold. Its a 'bomb' shaped thing about 9" long if my memory serves me well. On my Jago Jeep ( Willys MB ) replica I use hand operated wipers and 'Rainex' spray which work reasonably well.
  • 13-12-2012, 14:52
    scooder
    What 50's Ford is it? Does it have a vacuum pump on the bottom of the fuel pump? I've had a bunch of vac wiper stuff, and if it has the vac pump, if this pump is there and working, they work well. Dont stop when you floor it, or go up hills, as the pump takes over when the inlet vac stops. You should be able to manualy move the wipers through there full travel, with the engine off. If they dont or get tight, youll need to investigate why. If the pipes on the vac pump (if fitted) are the wrong way round, this can make them stop half way through there travel. Try pulling the pipe off the wipermotor and spray some WD40 in the motor throught the hole, and work the wipers to and frow. This can unstick the valve in side, aswell as making the wipers work better. The hiss under the dash does point to a stuck valve, so give the spray a go, see if it fixes them.
    Martin.
  • 13-12-2012, 14:49
    corvette
    classic american mag did a feature on re building vac wiper motors a few months back, not much to them, and you can buy re build kits in states, might aswell put your arm out the side window for as much use as they are, easy to fix once stripped
  • 13-12-2012, 13:19
    stueeee
    They work off the inlet manifold vacuum as said. trico vacuum wiper motors have a paddle inside which sweeps a near semicircle and then sweeps back again; this happens because a valve changes which side of the paddle sees the manifold's vacuum as the paddle sweeps across. The spindle is attached to this paddle and gives the back and forth motion when it's working properly. It sounds like the valve may be sticking in your motor.

    You could repair or rebuild it, but as Mikeyboy says, the wipers slow down as you speed up, not great on our crowded roads. I changed the vacuum motor for a two speed electric one on my '50 Chevy truck. Unless originality is important to you, it would be worth you upgrading to electric wipers IMO.
  • 13-12-2012, 13:10
    mikeyboy
    might be a good idea to pull the motor and check for leaks,take the vacuum source straight off the intake manifold with smallest diameter hoses.
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