Checking and cleaning an SU carburettor
ptfe auto oil seals sophisticated
technology
The SU carburettor is simple to strip. It has only one jet (except in a few special types) and very few moving parts. It is very reliable, but it can become dirty and choked — and some parts wear out.The most common type of SU is the HS. The HIF, overleaf, differs in some ways. They should be removed from the engine for cleaning.
Removing the dashpot ptfe auto oil seals sophisticated technology
Unscrew the damper and pull it out of the ‘dashpot’ (properly called the piston chamber). It may pull straight out, or you may have to unfasten a circlip to free it.Mark how the dashpot fits on to the main body so that you can replace it as it was. If it is turned, the piston may stick.Lift out the piston and jet-needle assembly,auto oil seals, taking care not to bend the needle. Loosen the grub screw to free the jet needle.
Lift out the piston and jet-needle assembly, taking care not to bend the needle.
Loosen the grub screw to free the jet needle.auto oil seals.
Remove the screws holding the dashpot. Lift it off.
Pull out the piston carefully, straight upwards. It is easy to bend the jet needle.ptfe auto oil seals sophisticated technology.
The SU carburettor is simple to strip. It has only one jet (except in a few special types) and very few moving parts. It is very reliable, but it can become dirty and choked — and some parts wear out.The most common type of SU is the HS. The HIF, overleaf, differs in some ways. They should be removed from the engine for cleaning.
Removing the dashpot ptfe auto oil seals sophisticated technology
Unscrew the damper and pull it out of the ‘dashpot’ (properly called the piston chamber). It may pull straight out, or you may have to unfasten a circlip to free it.Mark how the dashpot fits on to the main body so that you can replace it as it was. If it is turned, the piston may stick.Lift out the piston and jet-needle assembly,auto oil seals, taking care not to bend the needle. Loosen the grub screw to free the jet needle.
Lift out the piston and jet-needle assembly, taking care not to bend the needle.
Loosen the grub screw to free the jet needle.auto oil seals.
Remove the screws holding the dashpot. Lift it off.
Pull out the piston carefully, straight upwards. It is easy to bend the jet needle.ptfe auto oil seals sophisticated technology.
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