This rebuild kit fits all horizontal and vertical TRD brand cylinders. There is a sticker in the center of all the cylinders 6/1995 and later with the manufacturer’s name. 1964 – 6/1995 machines had cylinders we made in house. 6/1995 – 9/2012 machines had TRD cylinders. 9/2012 to present have Norgren cylinders.
Keep in mind there are limits to the number of times you can rebuild cylinders. The insides of the cylinder walls wear with use and the diameter grows larger. Eventually even new piston cup seals won’t have enough cylinder wall tension to seal.