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Old 07-20-2022, 11:25 AM   #1
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Wiper Arm Removal

While changing the blades on my wiper's I managed to break one of the pantograph arms. Decided it would be best to replace all 3 wiper arms. I was able to remove the nuts after a few doses of PB Blaster but the fitting on the main arms remain firmly in place on all 3.

I was able to fit a tapered pry bar between the large nut and bottom of the arm (see picture) and tap it in with a hammer but no joy. I've considered removing the 2 Phillip's head screws to remove the whole thing but am afraid that would result in the motor separating on the inside which would require some major cabinet removal. It's not really in a good place to apply heat, pretty tight clearance. I'm considering a dremmel tool to cut through the fitting but it looks pretty thick, maybe 1/2". Thought I'd check here before going forward incase anyone has had a similar issue and found a way. Thanks in advance.
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Old 07-20-2022, 11:45 AM   #2
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I've had to use a dremel cut off blade to make slits in the wiper arm and then use a screwdriver to pry the wiper arm apart.
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Old 07-20-2022, 11:47 AM   #3
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The shaft may be splined and looks like it is firmly corroded in place. If you can’t do heat with a gun, maybe a big soldering iron laid again it??? I would PB the heck out of it first followed by some tapping on it to create vibrations to help work the PB into the fitting. Let it sit a couple of days and repeat the PB and tapping multiple times.
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Old 07-20-2022, 11:49 AM   #4
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Quote:
Originally Posted by ksanders View Post
I've had to use a dremel cut off blade to make slits in the wiper arm and then use a screwdriver to pry the wiper arm apart.
That is a good idea too it you can get the bit up in there. I have a flexible extension for my Dremel. Something like that may let you get up in there.
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Old 07-20-2022, 12:22 PM   #5
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maybe something like this can do it? no relation to seller.
https://www.ebay.com/itm/23073433563...IaAu72EALw_wcB
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Old 07-20-2022, 12:37 PM   #6
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Take a very close look at the shaft where the wiper arm attaches. You may have a clip that hooks over the drive spline to hold the arm into place.
THat clip needs to be held back with a screwdriver. Then maybe the whole arm will release. It will still take some discussion as the spline engagement may have corroded.

Use some penetrating oil also.

A Dremel on the top could be used to produce a hole over the spline adapter and then a small puller to pull the arm off. If you go that route then spraying is even easier.

When you reassemble coat the spline adapter and the inside of the arm spline with a
silicone grease, auto grease, or some kind of lubricant. That will prevent the corrosion from seizing the internal and external splines.

I am in the process, one more to do, of changing my arms to Ongaro made units.

They use a small screw to secure the arm spline onto the motor spline by clamping. When loosened the arm is easily removed. I still grease it though.
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Old 07-20-2022, 01:15 PM   #7
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A small gear puller may do the job once the penetrant has soaked in.
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Old 07-20-2022, 02:51 PM   #8
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I just dealt with a similar issue on my HE36 - All three wiper arms were firmly corroded to the shafts. They're normally held in place with small splines and a set screw on each, but mine weren't budging even after a couple of days of PB. I have a bit better access I think and was able to use my mini butane torch to pinpoint heat on the fitting. Heated them up and gave a light tap with a hammer and they popped right off.

Here's the torch I use (works great with the hot air fitting for heat shrink tubing and connectors as well): https://www.homedepot.com/p/Bernzoma...0194/100564678
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Old 07-20-2022, 05:22 PM   #9
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First I would see if you can find wiper arms of that style. I have my doubts that such arms are available. I think you are opening a big can worms.
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Old 07-20-2022, 05:36 PM   #10
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Thanks for all the ideas. As of now I'm in the PB/tap-tap/wiggle mode. I'll give this a few days before resorting to destruction. The wiper arm puller would be perfect if there was clearance but it's only about 1/2". The butane torch is a great idea and may work in that area if I add some protection since it's a very direct flame. This is exactly why I came here for advice! I've looked again and can't see anything else that could be securing the arm.

I've already purchased the replacement arms so there is no issue there. Marine Connection Liquidators in Ft. Pierce FL is an amazing place if you ever get the chance!
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Old 07-20-2022, 06:01 PM   #11
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When those new arms go on I would use plenty of anti-seize, too.
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Old 07-29-2022, 11:07 AM   #12
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I recently removed our pantograph arms. Tried PB Blaster, hammer with wooden wedge and a torch, but no luck. Purchased the below tool which worked well. Short enough to just fit under overhang clearance. Pricey but professional grade. Less expensive versions available but they looked flimsy.
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Old 07-30-2022, 07:11 AM   #13
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Thanks, that just may fit. Nothing else has worked so far. Do you recall where you got the puller?
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Old 07-30-2022, 08:37 AM   #14
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Quote:
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Thanks, that just may fit. Nothing else has worked so far. Do you recall where you got the puller?
Amazon has variety of designs and prices. Search for ‘wiper puller’. The one I used needed ~3 1/2” clearance from bottom edge of wiper, but could be reduced by an inch with a shorter bolt. Looks like 14mm/1.5mm pitch.
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Old 07-30-2022, 08:54 AM   #15
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Auto zone has the puller for $10. Take a careful look there may also be a small Allen screw located in the wiper arm. Mine was covered w crud and hard to see.

Also when putting the new arms on make sure you have the angle right or you get to pry them off and do again.
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Old 07-30-2022, 08:59 AM   #16
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On some pantograph setups pull the arms up and away from the windshield which releases tension on the built in clamping device.
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Old 07-30-2022, 09:44 AM   #17
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A small gear puller may do the job once the penetrant has soaked in.
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Old 08-01-2022, 01:01 PM   #18
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Endorse what tiltrider1 said - don't go forward until you have a solution that's tried and proven. I'd fix one, and then decide if the other two can be improved by pulling them.
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Old 08-01-2022, 06:41 PM   #19
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I cut into each side with a Dremel and cutting wheel, then tapped in a screwdriver lightly - came straight off
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Old 08-09-2022, 10:43 AM   #20
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Quote:
Originally Posted by tiltrider1 View Post
First I would see if you can find wiper arms of that style. I have my doubts that such arms are available. I think you are opening a big can worms.

I was able to purchase replacement arms for my Mainship 400 from Amazon. My research suggests most boat manufacturers uses 1 of 2 different types, AFI or MRV.
As far as removal some lubricant, a little heat and a pry bar with a wood block against the fiberglass and mine popped right off. Don't forget the set screw as mentioned as well but yours may not have it if a nut is used to secure the arm.
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