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Re: Very Heavy clutch pedal
[Re: sarnia]
#576671
15/05/19 02:18 PM
15/05/19 02:18 PM
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Joined: Aug 2015
Posts: 30 Luxembourg
mich
Just Getting Started
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Just Getting Started
Joined: Aug 2015
Posts: 30
Luxembourg
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Hi Sarnia,
I had exactly the same issue when I bought mine a few years ago. I went for the pedal box, over-greased every possible part of the system to zero effect. In my case it all came down to an originally badly guided clutch cable of more than a a meter which went all the way from the drivers side (left on my car) passing far in front of the sump to the bellhouse clutch fitment on the other side. That long and wobbly cable eventually wore out until the clutch pedal showed the symptoms you describe. I went through some very poor attempts by a local garage to fix it- resulting in a general overhaul of the gearbox, a new clutch set a.s.o. I learned quite something about Morgan mechanics over a few months. In hindsight a new, shorter, properly guided clutch cable would have been the end of all trouble. My new shorter cable now runs behind the sump. Clutch works perfectly.
Cheers, Mich
Last edited by mich; 15/05/19 02:20 PM.
4/4 1996 1.8 ZETEC It has Swivel Pivots and an amazing Umbrella Holder!
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Re: Very Heavy clutch pedal
[Re: sarnia]
#576676
15/05/19 03:16 PM
15/05/19 03:16 PM
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Joined: Apr 2008
Posts: 7,989 Gloucestershire, UK
Hamwich
Talk Morgan Guru
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Talk Morgan Guru
Joined: Apr 2008
Posts: 7,989
Gloucestershire, UK
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Here's what I think may be happening. The cars of this era that have a cable-operated clutch use a bell-crank type arrangement to transfer the thrust of the clutch push rod to the pull on the cable to operate the clutch. It is mounted low down on the forward face of the engine bulkhead just next to the brake master cylinder. The bell crank comprises two arms arranged at 90 degrees to each other, the arms are brazed to the ends of a tube. Over time, the brazing weakens and the angle between the two arms reduces from 90 degrees. This has the effect of reducing both the mechanical advantage and the length of throw, causing the clutch to become heavier and more difficult to disengage. The cure is to remove the crank, realign the arms to 90 degrees, and weld in a bit more stiffening. The picture below is of my car at Kevin Vernon's, showing the beefed-up version that he did for my car when he put the new chassis on. The finger pointing at it belongs to none other than SpannerJuggler. 
Tim H. 1986 4/4 VVTi Sport, 2002 LR Defender, 1957 R4 CV, 2005 Ferrari Vipar
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Re: Very Heavy clutch pedal
[Re: Hamwich]
#576680
15/05/19 03:45 PM
15/05/19 03:45 PM
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Joined: Sep 2014
Posts: 1,477 London
MOG 615
Has a lot to Say!
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Has a lot to Say!
Joined: Sep 2014
Posts: 1,477
London
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The finger pointing at it belongs to none other than SpannerJuggler.
Thought I recognised those dainty fingers . Looks like a good mod from Kevin there Tim
Andy G 1999 +8 , Indigo Blue. Ex-John McKecknie/Mike Duncan 1955 +4 racer.
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Re: Very Heavy clutch pedal
[Re: sarnia]
#576683
15/05/19 04:00 PM
15/05/19 04:00 PM
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Joined: Dec 2011
Posts: 1,914 Seattle, USA
Button
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,914
Seattle, USA
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Rather than engineer a method of clutch release I opted for an internal slave system for My +8 Bitsa and ZETEC powered DHC. The downside of this is I must pull the engine/trans if I have problems with the slave. The upside is an easy design and by changing the size of the clutch MC I can very the effort required. Another downside may be cost???
Button
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Re: Very Heavy clutch pedal
[Re: Hamwich]
#576685
15/05/19 04:40 PM
15/05/19 04:40 PM
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Joined: May 2014
Posts: 2,654
SteveT
Talk Morgan Expert
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Talk Morgan Expert
Joined: May 2014
Posts: 2,654
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Those nails look far too clean to me..
Steve
110th +4 AM Chiltern Green 1939 Velocette KSS 1959 BSA Goldstar DBD34 Fellow of the Wild Mogs
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Re: Very Heavy clutch pedal
[Re: MOG 615]
#576696
15/05/19 05:32 PM
15/05/19 05:32 PM
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Joined: Apr 2008
Posts: 7,989 Gloucestershire, UK
Hamwich
Talk Morgan Guru
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Talk Morgan Guru
Joined: Apr 2008
Posts: 7,989
Gloucestershire, UK
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The finger pointing at it belongs to none other than SpannerJuggler.
Thought I recognised those dainty fingers . Looks like a good mod from Kevin there Tim I've just remembered - that's actually my hand, Colin was taking the pictures. I was far too excited to remember to take any photographs myself.
Last edited by Hamwich; 15/05/19 05:32 PM.
Tim H. 1986 4/4 VVTi Sport, 2002 LR Defender, 1957 R4 CV, 2005 Ferrari Vipar
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