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Old 01-16-2011, 06:08 PM   #1
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Subaru Outback Rear Wiper Arm


While clearing snow, I broke the rear wiper arm of my 2009 Subaru Outback. I bought a replacement arm and tried to remove the old one,
which is held onto the motor shaft by a single nut. After removing the nut, the arm is supposed to lift right off, but it won't. I looked up a service diagram online to see if there is another step I missed, but there is nothing else to do but lift it off. It needs to be pried, evidently, but the arm is attached to the rear window glass, so there is a great risk of
breaking the glass by prying with, say, a screwdriver. I did try WD-40, but
it still won't budge. Any suggestions would be greatly appreciated.

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Old 01-16-2011, 07:11 PM   #2
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Subaru Outback Rear Wiper Arm


last time i did this job was total pita. i don't know how much arm you have left, but anything that puts torque on the shaft will keep jamming it. so, try to release tension spring.
unless they came up with something new, those simply sit on splined shaft. it gets oxidized and yes, jams. on mine, it was "get a good grab - wiggle it off" job. see if you can get puller that will work on it. something with very thin jaws, like valve spring release tool.
or, 2 thin jaw prybars, with curved jaws.

i have here in front of me paint can lid opener. Linzer/American. 2 of those would have been ideal, just place something between the jaw and glass, plastic, plywood, something thin.
Code:
http://anthonyco.com/paintcanopeners.php?gclid=CInJ3J6HwKYCFQkPbAodh1qrJA

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Old 01-17-2011, 07:00 AM   #3
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Subaru Outback Rear Wiper Arm


The only part of the arm left is a one-inch piece still attached the shaft. Even the tension spring is gone with the rest of the arm. Under the piece that remains is a rubber "bumper', a flat-topped cone piece surrounding the threaded shaft, evidently there to protect the glass and seal the hole
leading down to the motor. Where would it be best to try the tools you
suggested without risking damage to the threads on the shaft? Thanks again for your suggestions.
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Old 01-17-2011, 09:40 AM   #4
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Subaru Outback Rear Wiper Arm


we;;, paint can lid openers are at home depot. maybe even laying around your place, as sometimes they come with paint cans.
valve spring compressor are rental from a parts store.
this one here looks ideal for the job, as far as you have enough clearance between the base of broken arm and glass

http://www.google.com/products/catal...d=0CCEQ8wIwAA#

you must have at least 2 jaws on the broken piece, or you are taking chances of bending shaft. has to be even pull on both sides.
if you do NOT have enough clearance for a puller, which i wouldn't be worried about the rubber grommet, you can always buy new one or seal it with something, you will have to have 2 flat prybars to do the job. here's a suggestion. find 2 long flat head screwdrivers. normally, only about inch of the end of it is heat treated and hardened. the shaft can be bent - yes, creating a flat head prybar. i have vise in my garage, it's piece of cake for me to make something like this.
it's common sense job. i don't see, why simply a good visegrip and a strong person should not be able to wiggle it off.

hey, scratch that compressor. it won't work for your purpose.

you need something like this, just with very thin jaws:
http://www.tooltopia.com/otc-tools-6...aign=nextag_r1

Last edited by ukrkoz; 01-17-2011 at 09:52 AM.
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Old 01-17-2011, 03:10 PM   #5
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Subaru Outback Rear Wiper Arm


Your suggestion about the paint can openers did the trick. As you said, it has to be two of them, working together. The fit is so tight on the shaft that one opener puts a side-force which effectively tightens the grip.
I used two, with two wood blocks, held by an assistant. Once it seemed
to loosen slightly, a vise-grip, with a slight back and forth twist, did it.
Thanks again.
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Old 01-17-2011, 08:34 PM   #6
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Subaru Outback Rear Wiper Arm


isn't it interesting how everyday objects can be used for quite a task?
glad you got it. before you install new arm, don't forget to apply any-seize to splines. if you did, take it off, and re-do. thank me later.

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