[Mgs] Mgs Digest, Vol 197, Issue 3

Mon Oct 30 12:25:48 MDT 2023

There should be a small amount of free play at the pushrod to master
cylinder piston (~ 1/16" which translates to ~ 3/8" at the pedal). This
ensures the piston is able to fully return to the off position.

Check the pushrod & clevis pin at the slave cylinder. Since they are
exposed to the elements they will often wear - the hole in the pushrod
becoming elongated & the clevis pin looking more like a mini crankshaft.
All that lost motion means the clutch doesn't operate through a full
stroke.

EjR

On Mon, Oct 30, 2023 at 2:10 PM <mgs-request at autox.team.net> wrote:

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>    1. 58 mga (dave northrup)
>    2. Re: 58 mga (Paul Hunt)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Sun, 29 Oct 2023 23:49:07 +0000
> From: dave northrup <dave at ranteer.com>
> To: "mgs at autox.team.net" <mgs at autox.team.net>
> Subject: [Mgs] 58 mga
> Message-ID: <f0749b4467b54c8a96fb6b7bc8ee7237 at ranteer.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I am reassembling the car; it was never running and driving under my
> ownership.
>
> I noticed today as I'm attempting to get the car running and driving for
> the first time that there is play in the clutch in the rod that goes into
> the master.
>
> It is threaded about as far out as it can go.
>
> It occurred to me that I could thread a rod so that there is virtually no
> play, and that the as soon as you press the clutch pedal it will move
> inside the master.  It also occurred to me that that might be a bad idea.
> Can/should I do that?  or will it push too far inside the master and cause
> additional problems?  It isn't more than about ?" of play or so
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> Message: 2
> Date: Mon, 30 Oct 2023 08:18:53 +0000
> From: Paul Hunt <paulbhunt73 at gmail.com>
> To: mgs at autox.team.net
> Subject: Re: [Mgs] 58 mga
> Message-ID: <3f0cd945-7962-4191-9216-445ada16c45b at gmail.com>
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>
> What's the biting point like?? If that's fine then leave it alone.
>
> I don't know the MGA master but on the MGB the master piston comes back
> to the circlip in the bore and positions the resting position of the
> pedal, and that determines how much 'throw' you have at the pedal, the
> slave cylinder and hence the release bearing.? Slop in the linkage at
> the pedal puts it closer to the floor and results in less slave piston
> movement and hence a lower biting point.? The same is not true of the
> linkage at the clutch end as a spring inside the slave cylinder pushes
> the piston out to take up all the play at that end, and more importantly
> to compensate for the graphite release bearing wearing down.? The more
> that wears the further the piston moves out, drawing fluid down from the
> master reservoir, so you continue to get a full stroke of the release
> arm.? That makes the MGB clutch system self-adjusting, and there is no
> scope for threaded adjustment anywhere in the system.? But as I say that
> is the MGB not the MGA.
>
> PaulH.
>
> On 29/10/2023 23:49, dave northrup wrote:
> >
> > I am reassembling the car; it was never running and driving under my
> > ownership.
> >
> > I noticed today as I?m attempting to get the car running and driving
> > for the first time that there is play in the clutch in the rod that
> > goes into the master.
> >
> > It is threaded about as far out as it can go.
> >
> > It occurred to me that I could thread a rod so that there is virtually
> > no play, and that the as soon as you press the clutch pedal it will
> > move inside the master.? It also occurred to me that that might be a
> > bad idea. Can/should I do that?? or will it push too far inside the
> > master and cause additional problems?? It isn?t more than about ?? of
> > play or so
> >
> >
> > _______________________________________________
> >
> > Mgs at autox.team.net
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> > Unsubscribe:
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> End of Mgs Digest, Vol 197, Issue 3
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