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They started parking a little high but giving it just a touch with the stalk would bring them down and they woud stay there. I had replaced the motor yrs ago with a junkyard one that i took apart and cleaned . When the cycle started it would go down about an inch before coming up for the full swipe and that went on for yrs.
But now the parking started going higher and higher until trying to set them would just cause a full cycle again . Now they park at 12 o'clock and come down when the cycle is started and return to 12 to park.
I cleaned the grounds, the backside of the motor cover, the connector and spades, also the ground strap that goes to the strut tower with no change.
I cleaned the 3 contacts for park and run in the motor cam assembly . No change.
I thought maybe the gear in the motor spun or cracked so I replaced the wiper motor assembly with a spare and still no change.
The wipers have been running very smoothly no binding or any noise that i noticed. I dont think the cabling jumped but it almost like its out of phase but its just a simpe rotation of the motor for a complete cycle.
The intermittent cycle goes through just one pass all the time and the other settings low and high work fine as well.
I feel like I am missing something real simple here?
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Loosen the nuts at the base of the arms. Reposition the arms. Tighten the nuts. It may solve the problem, but doesn't explain why the motor is stopping in the wrong position. However, if the motor does return to parking correctly, would the wipers arms end up on the hood?
--
1980 245 Canadian B21A with SU carb, M46 trans, 3:31 dif, in Brampton, Ont.
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Can you turn your head upside down under the glove box and look at the position of the short arm driven by the motor assembly? It should look like this (except for the water leak). At least if it does, you know the trouble is not in the gearbox, but in the drive or at the bolt that should be covered from view.
When parked, the long driven arm should match the short driving arm such that it hides the short one.
--
Art Benstein near Baltimore
An artist, and architect, and an engineer were at the bar discussing the relative values and enjoyment of mistresses and wives.
The artist decided, 'I would much rather have my mistress! It is always exciting and a little bit naughty and different.'
The architect said, 'I much prefer my wife. I like the stability and certainty.'
The engineer said, 'I like to have both. That way, my wife can think I'm with my mistress, my mistress can think I'm with my wife, and I can get back to the plant to get some work done.'
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Hi Art,
When I force the park so they are not in the view by turning off the key . The mount and arm are aligned like the picture. Otherwise when parked the connector and armature are aligned in parallel and the mounting nut is fully exposed. I then pull the connector to the motor so it does not finish the sweep and park at 12.
Thank you for your response.
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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If I read your post correctly, you are saying the motor, if left to its druthers, parks with the bolt exposed when the wipers stand high on the window. That pins the problem on the cam and contacts in the gearbox. That is, if you're sure that bolt is tight and its motor shaft's keyway locked into the slot of the driving arm.
Aside from that keyway issue, I have no experience with what could force that cam to be out of "clock" with the drive. Most folks would just swap in a new wiper motor, or did you say that was already done? If done, double check the keyway.
--
Art Benstein near Baltimore
I can't believe no-one submitted this classic engineers joke yet:
A man is flying in a hot air balloon and realizes he is lost. He reduces height and spots a man down below. He lowers the balloon further and shouts: "Excuse me, can you help me? I promised my friend I would meet him half an hour ago, but I don't know where I am."
The man below says: "Yes. You are in a hot air balloon, hovering approximately 30 feet above this field."
"You must be an engineer," says the balloonist.
"I am," replies the man. "How did you know?"
"Well," says the balloonist, "everything you have told me is technically correct, but I have no idea what to make of your information.
"The man below says, "You must be a planner."
"I am," replies the balloonist, "but how did you know?"
"Well," says the man, "you don't know where you are, or where you are going, and you have made a promise which you have no idea how to keep. The fact is you are in the exact same position you were in before we met, but now it is somehow my fault."
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Hi Art yes if left on its own it parks high on the window and the bolt is exposed and the keyway and arm are parallel to ech other.
The spare motor i had swapped was working normally when i got it from the junkyard.
I will check the bolt on the key way again for tightness again.
I watched the cycle and it appeared to go through it paces correctly.
Thanks again
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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You've got me, Joe. Pretty unusual having two motors with "slipped cams" I'd think, but maybe just outside my experience.
When you check the bolt, pull it loose to make sure the key is aligned. Then, with the drive disconnected, move the wipers by hand to see if they move freely and easily.
--
Art Benstein near Baltimore
"The problem with the designated driver program, is that it's not a desirable job, but if you ever get sucked into doing it, have fun with it. At the end of the night, drop them off at the wrong house." (Jeff Foxworthy)
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Art, this is starting to feel like one of those odd-ball puzzlers you used to post for us to diagnose.
Like you, and after doing my usual best to grasp at straws, based on the progressively worsening park position and other details posted, I'm having great difficulty imagining anything other than mechanical slippage at one end or the other on the shaft going through the firewall. The shaft itself is almost certainly one piece of metal. Given that the wiping area on the glass isn't moving (just the park position) then the short linkage arm on the end of the shaft simply has to be losing orientation with the plastic parking cam at the other end.
If it's not slipping in the slot under the 10mm nut then the plastic cam gear must be capable of slipping, such as under extreme loads like when the blades are stuck in ice or trying to move a load of snow. That might help explain things if the park position occasionally changes in steps rather than in continuously small increments from wear and tear. Anything else that could cause excessive loading between the wiper arm knurled studs and the cam gear?
If it's only an occaasional change then I'd just re-align the cam gear, tighten the 10mm nut over a serrated lock washer and scribe alignment marks everywhere to help spot any change the next time the park position moves.
All this discussion is bringing back memories of the many 140/240 wiper problems I had to sort out over the years, from contact corrosion on the back side of the cover plate to remounting dislodged magnets in horridly rusty motor cases, plus the usual relays, wiper arm slippage, switch stalks, pitted contacts and the linkage assembly under the dash. The 700/900 wiper systems are seemingly far less trouble prone.
--
Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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"Anything else that could cause excessive loading between the wiper arm knurled studs and the cam gear?
Yes, of course. The binding drives at the cowl are the very reason for this:
Notes on 240 Volvo Windscreen Wipers
I'd hope Volvo fixed the water shield and grease seal at the top of the drive under the wiper arm by the time they designed the 7/9 cars. At the least they fixed access to under the cowl, which is the 240's Achilles heel if there is one.
Anyway I assume the OP read the article (said he did).
--
Art Benstein near Baltimore
"If a woman has to choose between catching a fly ball and saving an infant's life, she will choose to save the infant's life without even considering if there is a man on base." (Dave Barry)
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Yes I did Art . I had great success lubing the arm pinions with "fluid film" from the top and let gravity take over. When I remove the arm to the motor the wipers move freely. I have time today to dig in again and get this straightened out .
Thanks again
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Hi Joe,
Fluid Film defies gravity.
I sprayed some along the pinch weld on the inside of the hatch last fall on this car that was parked for the winter. Looks like it found it's way through some failures in the seam and is currently working it's way up the exterior.
Similar results can be had using a wand to get the seam that joins the inner and outer rear quarter panels and the leading edge of the hood.
It's harmless to paint, but it does speak to it's penetrating nature.
Peter
I posted the picture in Brick Pix and pasted the location with the < img src= > business into the IMAGE URL but it doesn't move into the post. I give up.
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Hi Peter,
Don't give up. It was just a typo. You spelled "src" scr. And you included spaces.
--
Art Benstein near Baltimore
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Thanks, Art. I was so close, but for sure I'll get it next time.
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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When you get time, practice. I suggest you use the OPINIONS forum as a sandbox. The single most frequent complaint I hear from users of Volvo forums (fora?) is that the Brickboard has no "easy" way to upload media, and I believe Jarrod does read posts in that section.
--
Art Benstein near Baltimore
"I find television very educating. Every time someone turns on a set, I go into the other room and read a book." - Groucho Marx
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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I'm sure glad to hear your wiper drives are moving freely. Everything else is much easier to access. I wasn't sure when I posted, whether you had, not taking the time to read everything again. It is hard for me to find the reading time, much less the doing time.
Post back later and let us know how it is going. By the way, those marks on the contact cam were my way of getting it back together the way it was before I took it apart.
--
Art Benstein near Baltimore
By the time a man is wise enough to watch his step, he's too old to go anywhere.
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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HI Art,
turns out the key way arm spun 180 degrees and being that I did not know where the alignment of the arm and the wiper arm were supposed to be until your picture showed home alignment. when i had swapped motors i just reinstalled where everything was so to speak and of course continued to chase my tail.
I had to file down the key a tad to get a really snug fit, position it correctly facing the outer wall and then pull the wiper blades across ever so gently with the armature as I did not want to jump the tracks so to speak.
I am thinking when i put the junkyard motor in about 5 yrs ago or so i must not have had it seated all the way in the key?
THANK YOU!!
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Thank you for confirming. It wasn't clear in the write-up, so I added that shot of the keyway and gearbox shaft end. Notes on 240 Volvo Windscreen Wipers
Your experience will help someone else.
--
Art Benstein near Baltimore
"If life were fair, Elvis would be alive and all the impersonators would be dead." (Johnny Carson)
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Hi Joe,
Mine began parking in mid sweep this winter after I turned them on with the blades frozen to the windshield. After checking everything else, it turned out that the parking cam had slipped on it's mount.
I looked through Art's site and saw where there were index marks with felt marker. I don't know if the marks are original, but I couldn't find any on mine so I had to try a few different positions before I got it right.
Seems that if you're not seeing an improvement with a change of unit, your problem is likely elsewhere, but it wouldn't hurt to move the cam to another position and see what effect it has.
I should add that when monkeying with it, I found one mounting bolt missing and another one loose. That couldn't have been doing it any good.
regards,
Peter
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Hi Peter,
Yes I have been through Art's awesome site and pictures. There are no marks on the plastic cam in the motor housing. Is this the cam your referring too? I did not see a way to remove it easily being made of all plastic I did not want to force anythin either.
Thank you
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Hi Joe,
Yes, I'm calling the thing that the brass fingers slip into the cam.
I didn't want to mess with it either, but everything checked out electrically and things were square under the dash.
I think it's made out of pretty tough stuff, nylon maybe, and it came off quite easily by prying up, side to side with a screwdriver. In my case I think I moved it an hour or so clockwise. It seems that it's just pressed on there.
It's been 4 months since the fix and it'd been all hunky dory.
Good luck,
Peter
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Ok sounds good. I will get to the bottom of this one way or another.
Thank you Peter
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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I don't have a 240 but in my 940 the wipers did that after car came back from paint job. It turned out to be half-loose wiper arm nuts.
Amarin.
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Yes, that happened to me too. One nut had backed off so that wiper arm would not park correctly.
--
Will I buy another Volvo??? We'll see....
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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Hi,
Have you tried looking into this site for more information on how the system works mechanically and electrically?
There are lots of pictures!
http://cleanflametrap.com/wiper.html
Phil
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posted by
someone claiming to be
on
Wed Dec 31 18:00 CST 1969 [ RELATED]
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HI Phil,
Thank and yes Ive been over Art's site numerous times regarding this.
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