How to undo the upper nut on 940 clutch master cylinder?

martin calva · Oct 22nd, 2021, 16:19

Hello,

I am changing the clutch master cylinder on my 1994 940 diesel. (According to Skandix they are the same on all manual 940's with hydraulic clutch operation.)

I have undone the lower nut that retains the master cylinder but I cannot access the upper one. Is there a trick to access the upper nut? Should I remove the clutch pedal to get at it? If so, how is the clutch pedal removed?

Thanks for any advice/suggestions.

Martin

Dippydog · Oct 22nd, 2021, 17:01

Would it be possible to use a crows foot spanner on it?

martin calva · Oct 22nd, 2021, 18:19

Would it be possible to use a crows foot spanner on it?

That might be possible - if I had one, I'd give it a go.

Ian21401 · Oct 22nd, 2021, 18:50

If you are removing the master cylinder then you will need to release the cylinder pushrod from the clutch pedal so you may as well remove the clutch pedal by removing the pedal pin. You should then be able to access that upper nut.

360beast · Oct 22nd, 2021, 19:33

Extensions and a UJ

martin calva · Oct 22nd, 2021, 21:51

Thank you for all the helpful suggestions. In the end, with intense contortions, I managed to get the upper nut undone with the use of a 13mm French "pipe spanner":

Oct 22nd, 2021, 16:19	#1
martin calva Senior Member Last Online: Feb 8th, 2024 21:33 Join Date: Apr 2015 Location: Falaise	How to undo the upper nut on 940 clutch master cylinder? Hello, I am changing the clutch master cylinder on my 1994 940 diesel. (According to Skandix they are the same on all manual 940's with hydraulic clutch operation.) I have undone the lower nut that retains the master cylinder but I cannot access the upper one. Is there a trick to access the upper nut? Should I remove the clutch pedal to get at it? If so, how is the clutch pedal removed? Thanks for any advice/suggestions. Martin

Oct 22nd, 2021, 18:50	#4
Ian21401 Premier Member Last Online: Feb 11th, 2023 20:32 Join Date: May 2010 Location: Blyth, Northumberland	If you are removing the master cylinder then you will need to release the cylinder pushrod from the clutch pedal so you may as well remove the clutch pedal by removing the pedal pin. You should then be able to access that upper nut. __________________ Ian. Since 2005: 1992 Volvo 940 estate 2.0L. Manual. Daily driver and workhorse.

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Oct 22nd, 2021, 17:01	#2
Dippydog Premier Member Last Online: Apr 16th, 2024 11:05 Join Date: Jun 2016 Location: S****horpe	Would it be possible to use a crows foot spanner on it?

Oct 22nd, 2021, 18:19	#3
martin calva Senior Member Last Online: Feb 8th, 2024 21:33 Join Date: Apr 2015 Location: Falaise	Would it be possible to use a crows foot spanner on it? That might be possible - if I had one, I'd give it a go.

Oct 22nd, 2021, 19:33	#5
360beast Go redblock or go home Last Online: Yesterday 16:56 Join Date: Feb 2012 Location: UK	Extensions and a UJ

Oct 22nd, 2021, 21:51	#6
martin calva Senior Member Last Online: Feb 8th, 2024 21:33 Join Date: Apr 2015 Location: Falaise	Thank you for all the helpful suggestions. In the end, with intense contortions, I managed to get the upper nut undone with the use of a 13mm French "pipe spanner":

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