Description Limited stock on hand - Better option is to order 4320 Kit. Please call prior to ordering to check stock Rebuilt pulsator for C or P Original Surge metal pulsators. Very limited stock on hand. MODEL DETERMINED BY THE FIRST LETTER OF THE SERIAL NUMBER ON THE BOTTOM OF YOUR PULSATOR - This pulsator replaces C or P models Troubleshooting; check the vacuum level - Should be 11 or more while on the cow or the pulsator won't work. Vacuum leaks, worn out pumps or too small of pumps are common causes of the pulsator not working. check the vacuum hose. if it is blocked, the pulsator will not work check the slides - on P and C models the front and rear slides are different and if switched, the pulsator won't work Do Not oil the block - only the leathers Fits Lid 1086 Instructions can be found on our manuals page The Surge Vacuum Pulsator was patented in 1921 and manufactured until 1999. More details at http://surgemilker.com/ Related Items; 4320 Interpuls Pulsator with 4 pipes and Mount for Surge Bucket Milker 4310 Rebuild Kit for Surge Bucket Milker Vacuum Pulsators 4311 Rebuild Kit with oil for Surge Bucket Milker Vacuum Pulsators 1047s - Silicone Lid Gasket - works for all lid