Service Manual
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*NOTE* This service manual is for a NON EN10 modified engine. Whilst most of the information is relevent, there are some critical differences.
For more information on EN10 modified engines, please contact
Mick Broom at Broom Development Engineering on +44 (0)1327 353023

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Remove the four screws (3mm Allen key) holding the oil seal plate to the inside of the timing cover and lift off the plate.
This allows the piston to be lifted out, followed by the spring. The slave cylinder sleeve may then be extracted; should this component be difficult to move, try the effect of levering upwards against the back face using light pressure. The sleeve is only held in place at this stage by an O ring around its outer diameter. It is not normally necessary to remove the plate covering the, outside of the clutch cylinder, but this may help when removing a tight sleeve. NOTE: When reassembling always use the utmost cleanliness as contamination of the seals with engine oil or solvents will cause them to expand and prevent the clutch from working properly. The hydraulic seal and O rings should only be lubricated with brake fluid, Castrol rubber grease or Silicone grease, NOT conventional oil or grease. To change the hydraulic seal, run an old rounded screwdriver around the groove to roll the old seal over the end of the piston. Lubricate the new seal and fit it to the groove in the same way, with the lip of the seal facing away from the O ring groove in the piston.
It is easier to assemble the clutch cylinder to the sleeve through the opposite end away from the flange, and then push the piston part way through the flange end before assembling the O ring. When renewing the oil seal in the inner cover of the slave cylinder, note that the garter spring should face towards the centre of the engine (i.e. visible when assembled).

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