Based in Missouri, Boling Machine Shop that has been manufacturing heavy duty John Deere replacement load control shaft seals for 35 years. After years of replacing leaky load control shaft seals on Deere 30 and 40 series tractors, Boling Machine Shop came up with permanent, heavy duty replacement seals. 

​

The replacements are machined out of steel with Teflon liners, O-rings and neoprene washers, depending on the model. The O-rings, liners and washers can be replaced without replacing the seals.