Lister Petter TX3 Overhaul gasket/joint set 657-33990 RD 90 Build 20 and 76 are

Build 20 and 76 are variable speeds engines 1025 to 3000 RPM with no overload

This will item 5 in the HR cylinder head picture and item 10 in the remote oil filter picture

there is a difference between the upper and lower cup

657-23523  Lister Petter decarbon gasket set

Lister Petter TX3 Overhaul gasket/joint set 657-33990 RD 90 Build 20 and 76 are657 33990 Complete overhaul gasket set for a TX3 Lister Petter model engine. This joint gasket set will only work for the 3 cylinder engine. These are the latest gasket available and are not old stock. This engine was used in the Read ScreenAll machines and was usually in the RD 90 models along with later Lister Petter engines, TR3 models