Provided are an anti-vibration device manufacturing method, a stopper for an anti-vibration device, and an anti-vibration device all of which prevent easy separation between the stopper and the bracket while improving the ease of fastening the stopper and the bracket together. The anti-vibration device manufacturing method is a method for obtaining the anti-vibration device. The stopper can be formed, by applying a coating agent C, which is configured to be peelable after solidification, to at least a bulging portion (12) of a positioning protrusion (10) of the stopper. The anti-vibration device can be formed, by pressing the bulging portion (12) into a positioning hole A1 formed in the bracket 5, so that the bulging portion (12) is prevented from detaching from the bracket (5), using the stopper after solidification of the coating agent C.

An assembly connects a pitman arm to a slot in a crank arm of a pumping unit. A pin extends from the pitman arm disposed on a first side of the crank arm. The pin is disposed in the slot of the crank arm and has a distal end exposed on a second side of the crank arm. The distal end defines an external shouldered profile. A clamp is positioned on the distal end of the pin. The clamp has an internal shouldered profile, which is configured to engage the external shouldered profile on the pin. One or more spacers are disposed on the clamp and are configured to adjustably extend from the clamp toward the second side of the crank arm.