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7w ten starter pinion spring
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spitfirebob



Joined: 08 Oct 2012
Posts: 51

PostPosted: Thu Mar 30, 2017 5:45 pm    Post subject: 7w ten starter pinion spring Reply with quote

hi all
i have a re-occurring fault on my starter motor
it has had 2 new pinion return springs snap when cranking engine
there is a loud noise/bang when starter engaging which signals a snapped spring
engine has been newly rebuilt so is probably a little tight
would this cause the fault or does problem lie elsewhere?
Bob
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47Jag



Joined: 26 Jun 2008
Posts: 1468
Location: Bothwell, Scotland

PostPosted: Thu Mar 30, 2017 9:10 pm    Post subject: Reply with quote

Bob,
Are both of the springs from the same source and do the springs break at the same place? It could be a manufacturing fault. Is this the heavy spring?

Art
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spitfirebob



Joined: 08 Oct 2012
Posts: 51

PostPosted: Fri Mar 31, 2017 8:41 pm    Post subject: Reply with quote

47Jag wrote:
Bob,
Are both of the springs from the same source and do the springs break at the same place? It could be a manufacturing fault. Is this the heavy spring?

Art



Hi Art
got both springs from small ford spares
they are the small thin ones that push pinion gear in and out

Bob
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47Jag



Joined: 26 Jun 2008
Posts: 1468
Location: Bothwell, Scotland

PostPosted: Fri Mar 31, 2017 10:47 pm    Post subject: Reply with quote

Bob,

This is a standard inertia starter that we are talking about? The light spring, as I see it, is more of a deterrent for the pinion to creep along the screw after the engine has started. The actual pinion return is done when the engine fires and the ring-gear accelerates throwing the pinion back down the screw. This is one of the failings of the inertia style starter. It only takes one cylinder to fire to accomplish the 'throw back'.

Is the spring getting mangled or just snapping? Any pictures?

Art
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47Jag



Joined: 26 Jun 2008
Posts: 1468
Location: Bothwell, Scotland

PostPosted: Fri Mar 31, 2017 10:48 pm    Post subject: Reply with quote

Bob,

This is a standard inertia starter that we are talking about? The light spring, as I see it, is more of a deterrent for the pinion to creep along the screw after the engine has started. The actual pinion return is done when the engine fires and the ring-gear accelerates throwing the pinion back down the screw. This is one of the failings of the inertia style starter. It only takes one cylinder to fire to accomplish the 'throw back'.

Is the spring getting mangled or just snapping? Ant pictures?

Art
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alastairq



Joined: 14 Oct 2016
Posts: 1262
Location: East Yorkshire

PostPosted: Sat Apr 01, 2017 9:22 am    Post subject: Reply with quote

I suggest telephoning SmallFordSpares, or go on their website and email a query.

Paul Beck, and his colleagues, are very helpful when it comes to spares not behaving as one would wish.

It is entirely possible there is a quality problem?

I have had problems with one of their rear axle bearing kits, and eventually, between us, things seem 'sorted'. {not useful when the inner bearing sleeve detaches itself from the axle-end sleeve?]

I have to add, I do not know what we old-Ford enthusiasts will do if ever SFS decides to close down..?
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Paul fairall



Joined: 17 Nov 2016
Posts: 431
Location: North west Kent

PostPosted: Sat Apr 01, 2017 10:52 am    Post subject: Reply with quote

alastairq wrote:
I suggest telephoning SmallFordSpares, or go on their website and email a query.

Paul Beck, and his colleagues, are very helpful when it comes to spares not behaving as one would wish.

It is entirely possible there is a quality problem?

I have had problems with one of their rear axle bearing kits, and eventually, between us, things seem 'sorted'. {not useful when the inner bearing sleeve detaches itself from the axle-end sleeve?]

I have to add, I do not know what we old-Ford enthusiasts will do if ever SFS decides to close down..?
we will have to hot rod them with more modern running gear Very Happy
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spitfirebob



Joined: 08 Oct 2012
Posts: 51

PostPosted: Sun Apr 02, 2017 2:27 pm    Post subject: Reply with quote

47Jag wrote:
Bob,

This is a standard inertia starter that we are talking about? The light spring, as I see it, is more of a deterrent for the pinion to creep along the screw after the engine has started. The actual pinion return is done when the engine fires and the ring-gear accelerates throwing the pinion back down the screw. This is one of the failings of the inertia style starter. It only takes one cylinder to fire to accomplish the 'throw back'.

Is the spring getting mangled or just snapping? Ant pictures?

Art


Here is a pic showing offending spring !



[img][/img]
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47Jag



Joined: 26 Jun 2008
Posts: 1468
Location: Bothwell, Scotland

PostPosted: Sun Apr 02, 2017 9:19 pm    Post subject: Reply with quote

Bob,

I pulled this off the net:-
https://www.smallfordspares.co.uk/m/plates/plate117.gif
I looks like what I would expect to see. Comparing this to your photo the seems to be an anomaly at the end of the armature (No. 11) plus washer (No. 11365). Where on yours it looks to be a solid spacer and a washer and nut. The way it should work is the spring slides over the stepped sleeve and is pushing on the washer 11365. When it engages, the pinion pushes on said washer compressing the spring. So my question is where did you fit the spring on yours? If you fitted it between the pinion gear and the thick spacer the pinion would wind up and tear the spring because there isn't a washer to separate the pinion/spring.

Art
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spitfirebob



Joined: 08 Oct 2012
Posts: 51

PostPosted: Mon Apr 03, 2017 8:21 pm    Post subject: Reply with quote

Hi Art
here is a different view showing washer
i fit spring between washer and thick spacer
[img][/img]
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spitfirebob



Joined: 08 Oct 2012
Posts: 51

PostPosted: Mon Apr 03, 2017 8:46 pm    Post subject: Reply with quote

showing how bits are arranged
thick washer next to castle nut is the wrong way round though!!
[img][/img]
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47Jag



Joined: 26 Jun 2008
Posts: 1468
Location: Bothwell, Scotland

PostPosted: Mon Apr 03, 2017 8:51 pm    Post subject: Reply with quote

Bob,

Is the washer next to the nut part of the sleeve to its right? The thick part looks to be part of the Bendix as per the drawing. So is there a washer 11365 inside the thick part of the Bendix? If not that's the problem, if there is it's back to the drawing board Rolling Eyes

Art
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47Jag



Joined: 26 Jun 2008
Posts: 1468
Location: Bothwell, Scotland

PostPosted: Mon Apr 03, 2017 8:54 pm    Post subject: Reply with quote

Bob,

The part next to the nut is wrong way round and I don't see the 11365 washer.

Art
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47Jag



Joined: 26 Jun 2008
Posts: 1468
Location: Bothwell, Scotland

PostPosted: Mon Apr 03, 2017 8:57 pm    Post subject: Reply with quote

Bob,

Is the washer next to the nut part of the sleeve to its right? The thick part looks to be part of the Bendix as per the drawing. So is there a washer 11365 inside the thick part of the Bendix? If not that's the problem, if there is it's back to the drawing board Rolling Eyes

Art
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spitfirebob



Joined: 08 Oct 2012
Posts: 51

PostPosted: Mon Apr 03, 2017 9:01 pm    Post subject: Reply with quote

[quote="47Jag"]Bob,

Is the washer next to the nut part of the sleeve to its right? The thick part looks to be part of the Bendix as per the drawing. So is there a washer 11365 inside the thick part of the Bendix? If not that's the problem, if there is it's back to the drawing board Rolling Eyes

Art[/quote

hi Art
the washer is to the right of the spring
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