Wiper splines, Spindle dismantling, Bizarre Shapes ?

[rfs1957]

I've seen references to dismantling wiper spindles, from memory Chris Vine did this when re-furbishing and re-plating his parts, and others may have done it to replace worn parts, although I don't think that the splined wiper bosses or turrets that carry the wiper arms are available new, are they ?

I've got a correct S1 centre wiper mechanism with a rather dodgy splined boss, and would like to pull it off and replace it with a rather better one from the S2 mechanism I also have.



I imagine that the correct procedure would be to drill out the three deformed punched areas, and use a small puller, followed by pressing the assemblies back together and treating the interface to 3 new punch marks in fifferent places.

However, as I will get much better at doing this once I've done it wrong a few times, maybe someone who has already carried out the apprenticeship could steer my clumsy fingers ?



As regards the bizarre flats ground on these outer (L and R) spindles, I had imagined my car had slid up the road, been dragged through a scrap-heat upside down at some point, or attacked by some cack-handed angle-grinding madman, until I saw other pictures on other cars that appeared to have the same odd shapes.

Anyone any explanation please ?

[Robsan]

I cant help with removing spines, but I have noted those angled off spline heads

I had thought they were from the DA Sander possibly used on preperation for a repaint ?

Perhaps not, perhaps they are an "engineered feature "

[johnetype]

Rory, could they be because someone thought the retaining clips in the base of the wiper arms needed a "lead in" to enable easier sliding on? Obviously, for that to be true the chamfer would have to line up with the clip on the arms so does it?

John

[rfs1957]

The angle is pointlessly brutal if it’s to help fitting, so don’t think it’s that.

Anyone else seen these flats on their own cars ?

[abowie]

Sander is my bet.

I keep thinking that it couldn't be that hard to remanufacture those splines.....

[Duckham]

I imagine that the correct procedure would be to drill out the three deformed punched areas, and use a small puller, followed by pressing the assemblies back together and treating the interface to 3 new punch marks in fifferent places.

However, as I will get much better at doing this once I've done it wrong a few times, maybe someone who has already carried out the apprenticeship could steer my clumsy fingers ?

Rory -
I used the same procedure a long time ago and don't remember any problems.
Being worried about the drill bit 'wandering' I used a lathe centre drill bit in a pillar drill which was perfect for the job.


Joe

[mgcjag]

Hi Rory...Chris Vines wiper section....note photo of splines shamfered/filed like yours...I have seen the chamfering on other cars before...i assume it was done wrongly to aid fitting wiper blade........Steve http://etype.chrisvine.com/category/reb ... wiperrack/
Also if you google wiper splines there are lots of options like in the photo...something may suit

[rfs1957]

I had looked quite extensively for hints that something was available, but my Google can't even find the picture you've shown, Steve - and once it starts throwing up earlier posts that are MINE, from this Forum, I know I'm lost.

Anyone know if P1800 Volvos (1961 - 1973 ?) might have the same Lucas wipers ?

https://www.sw-em.com/Wiper_Arm_and_Blade_Notes.htm

I did come across the nice-looking brass splined bosses shown here, and have sent a message to the Forum concerned.

I have no confidence whatsoever in the smooth-bored adapters with grub-screws that are on offer, the oscillating loads on these are actually considerable and there is a reason they why were splined and peened when they were manufactured.

[288gto]

Hi Rory,

If it's just the splineded bits you are after, aren't the ones on your Mini the same or indeed a vast array of Lucas wheel boxes fitted to MGBs and other cars of that era ? Perhaps I'm missing something and that would be too simple?

If they were the same perhaps you could find one with the correct length shaft , remove the toothed wheel and fit the arm instead.




Simon

[PeterCrespin]

Regarding the chamfered flats, I’ve seen lots of wiper arms not fully attached or pressed down far enough to clip into the groove. They used the chunky arm spring to push the blade against the glass and effectively cause the arm to be canted on the splined boss in the opposite direction in a kind of ‘taper’ jam rather than parallel male & female splines. I could just about imagine axial ‘rocking’ causing that kind of wear without any rotary damage.

A carelessly-wielded sander around spindles deliberately left in place to save bodyshop time does seem more likely though...

[JerryL770]

The uprated wiper arms available from SNGB have a clamp mechanism onto the splines which is absolutely positive, though maybe not pukka original spec. I rather have firm arms which apply the blades to the screen effectively.

When I had the Facel, I had occasion to work on the mechanisms which were the same as on the Mini. I had to repair/replace the spindles with some 6mm SS rod, brazed into the drive gear. I don't remember how the arms then fitted to the spindles - they were pretty rubbish.