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Message board > Care and maintenance > Removing screen wiper arm

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Message 1 of 10
Posted by member Nicholas Duffin on Thursday 4 July 2013

The tension spring in the screen wiper arm of my Pilot 20 has died of rust and I need to remove the arm for repair or replacement.
How is it attached to the motor? I suspect it is a push fit onto mini splines and has corroded tight. The overlapping "brow" of the roof makes access and the use of heat or force difficult to put it mildly. Has any one solved the same problem?


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Message 2 of 10
Posted by member Simon Kidd on Thursday 4 July 2013

Hi Nicolas,

The later type of wiper fitted (approx 1987+) is a push fit - parallel splined fitting - they can be tough to seperate - penetrating oil may help!

The wiper arms can corrode on to the spnidle - though some arms have small grub screws securing the arm to the spindle - so double check there's aren't any..

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Message 3 of 10
Posted by member Gerald Lewis on Thursday 18 July 2013

I have just encountered the same problem on my Hardy Pilot 'Liberty' - with the socket of the broken wiper arm corroded tight onto the motor drive shaft spindle and no room under the lip of the cockpit roof to use a standard automotive puller to seperate them. In the end, I had to resort to the careful use of a junior hacksaw to remove the top of the wiper arm socket and then patient application of penetrating oil and pliers to ease the arm off. I also had some difficulty in sourcing a replacement arm and wiper blade in stainless steel without having to pay a kings ransom. Luckily, it would seem that several Triumph and MG sports cars from the 1970s and 80s used similar sized wipers and arms to those on the Hardy Pilot and replacement parts are fairly readily available via online suppliers and e.Bay. Be careful to obtain the correct socket shape for the spindle head though - the (Vetus?) wiper motor spindle on my Pilot has a square profile whereas a tapered spindle socket seems to be more commonly used many of the wiper arms on the market today.

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Message 4 of 10
Posted by member Simon Kidd on Monday 22 July 2013

Hi Gerald,

The wiper motors often used on Hardy's were TMC and AFI units ( I think they both produced for Vetus). There are a number of different fittings out there - a Taper with a secureing nut (more moden and likely the best) and the Parrallel splined fitting (the one that gets corroded on). Also older boats will have a smaller clamp on type arm.

The Old car wipers are the way to go - I've toyed with boat wipers for ages and find no great difference between marine abd vehicle blades.

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Message 5 of 10
Posted by member Rob on Friday 9 January 2015

My Navigator wiper arm was corroded on, which I wanted to remove because the spring had broken. My wiper arm was the push on type onto the splinned shaft. As I used a variety of tools, it would be impossible explain how I did it.
If it is any help to anyone, I used a wiper arm and blade designed for an MGBGT. These are the ones from the 70's. The blade and wiper were too long for the window on the port side by about 15mm. You can either hack saw the excess off or use your original wiper blade on your new wiper arm, if it fits (mine did).
I purchased the new wiper arm and blade from an ebay seller who specialised in MGB for about £17.00 inc postage. I asked the seller for the diameter of the spindle.
I realise another poster said it would fit the Hardy Pilot. I an just confirming it can fit the Navigator(nearly).

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Message 6 of 10
Posted by member Clive ffitch on Monday 1 May 2017

Thanks Rob and Simon for the tips and info - had to "dremel"-off the old wiper arm to get it off the splined shaft fitting of the motor, and successfully found an MGB_GT stainless wiper arm with confirmed 13mm spline fitting on ebay. If anyone else is in need, seller "carscarscarole" has them at £10.25 (arm only) + £2.00 postage.


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Message 7 of 10
Posted by member HOC Editor on Monday 1 May 2017

Thanks Clive,

Something else that has been driving me mad - now added to my to do list !

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Message 8 of 10
Posted by member Simon Kidd on Sunday 7 May 2017

I have a general dislike for boat wiper arms!! Well done Mike, not a nice job!

I also have a dislike for boat wiper motors! I use the TMC type (or Vetus etc) with the drive motor mounted in the side of the gearbox, these came into Hardy use around 1987/88. They have the power to deal with a good wiper arm spring - but alas the H25 doesn't have the window area for Pantagraph arms!

AGhhh!! Wipers!!

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Message 9 of 10
Posted by member Anthony Purnell on Monday 16 October 2017

Yes I agree they are a pain in the neck BUT do you really need to replace them. Try RAINEX treatment and you wont need wipers. Developed for airline industry great stuff and much less bovver! ;o)

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Message 10 of 10
Posted by member Simon Kidd on Thursday 16 November 2017

Rainex is a great idea and I have used it Mainly ion Single engineed aircraft) - though wipers are still needed on occasion in Dartmouth - just because my boat isn't as big as yours! ;-)

I keep trying to get over and say hello - but you're a very elusive Hardy owner!

Best Regards


Lady Helen, Hoo Down, Dartmouth.

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