... And easily damaged so you should get or make a puller and NOT try to wriggle it off..
Dean
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2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms
29th Jan 2018 7:43 am
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
Cheers chaps. Moral is you should always clear snow from the scuttle!
29th Jan 2018 9:32 am
BBDisco3
Member Since: 23 Nov 2008
Location: Cheshire
Posts: 3640
Not too sure if the spline is hardened metal and the arm is a softer metal, allowing the spline to cut its own groove
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
The spline is steel, the arm is made from soft alloy with the abrasion resistance of chocolate.
Looks like this when the arm is removed.
Click image to enlarge
Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here.
29th Jan 2018 10:18 am
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
Ok will invest in a new arm. When I had a brief look yesterday, the pivot was rusty, so probably past their best anyway.
29th Jan 2018 11:27 am
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
If you need a puller, I have one. Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here.
29th Jan 2018 1:50 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
Ok cheers. I have a small bearing puller somewhere, but good to know, if I can’t find it.
29th Jan 2018 1:59 pm
BBDisco3
Member Since: 23 Nov 2008
Location: Cheshire
Posts: 3640
Or you could try one of these
29th Jan 2018 8:39 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
You’ve lost me there BB!
29th Jan 2018 8:51 pm
BBDisco3
Member Since: 23 Nov 2008
Location: Cheshire
Posts: 3640
1. Remove wiper arm.
2. Place bottle top over spline, smoothing it to contours.
3. Locate wiper arm over newly moddled spline.
4. Using lump hammer, hit wiper arm as hard as possible.
5. Repeat but this time move fingers first .
6. Refit nut.
7 Wiper arm now secure and will never slip again.
Skimmed, Semi Skimmed or Full Fat of your choice
You must have done that in your early days - even on those vacuum operated wipers
29th Jan 2018 9:22 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
Ok I was wondering how the I was supposed to lever a wiper arm off a splined taper with a milk bottle top!
I see your logic, but having suffered a lost wiper in a snowstorm in the past, I think I’ll play safe and buy a new arm.
I had a Fiat Punto once and it’s wiper mechanism managed to snap, and the wipers tangled up on the motorway. Needed recovery to get home. Wipers are pretty essential!!
29th Jan 2018 9:30 pm
Compusmentis
Member Since: 18 Feb 2016
Location: Effingham
Posts: 237
Mine was just the same.
Clean the splines on the spindle to remove any remains of the softer material of the old arm. Then fit a new arm New gearbox & TC, 3 x front wheel bearings, belts changed, new oil pump, new battery, new rear prop, new front prop, new front diff, front arb refurbed, front cv boot kit, egr blank and BAS software patch, full rear suspension / drivelive rebuild, new front arms, LED trailer light fix, split charge.
Never had a 107, 90 or 127, but have had most of the rest!
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... All LED interiors lights, DRLs, Spare Wheel protector.
.
Ok I was wondering how the 
I was supposed to lever a wiper arm off a splined taper with a milk bottle top!
