A surgical instrument , comprising: (a) a body ; (b) an ultrasonic blade extending distally from the body , wherein the ultrasonic blade is operable to apply ultrasonic energy to tissue; (c) a clamp arm, wherein the clamp arm is operable to compress tissue against the ultrasonic blade ; and (d) a pivot assembly , wherein the clamp arm is pivotably coupled to the body at the pivot assembly , wherein the pivot assembly comprises: (i) a first link , wherein the first link is pivotably coupled with the body at a first pivot, and (ii) a second link , wherein the clamp arm is secured to the second link , wherein the second link is distal to the first link , wherein the second link is pivotably coupled with the first link at a second pivot, wherein the second pivot is distal to the first pivot, wherein the second link is further pivotably coupled with the body at a third pivot, wherein the third pivot is distal to the second pivot, wherein the first link has a distal portion and a proximal portion, wherein the first and second pivots are located at the distal portion, wherein the proximal portion includes a grip feature configured to be engaged by an operator to thereby drive the proximal portion toward the body , characterized in that the pivot assembly is configured to be attachable and detachable from the body , and in that the body comprises a pair of arcuate channels , and in that the first link comprises a pair of protrusions positioned to enter the pair of arcuate channels when the first link is rotated towards the body . (a) a body ; (b) an ultrasonic blade extending distally from the body , wherein the ultrasonic blade is operable to apply ultrasonic energy to tissue; (c) a clamp arm, wherein the clamp arm is operable to compress tissue against the ultrasonic blade ; and (d) a pivot assembly , wherein the clamp arm is pivotably coupled to the body at the pivot assembly , wherein the pivot assembly comprises: (i) a first link , wherein the first link is pivotably coupled with the body at a first pivot, and (ii) a second link , wherein the clamp arm is secured to the second link , wherein the second link is distal to the first link , wherein the second link is pivotably coupled with the first link at a second pivot, wherein the second pivot is distal to the first pivot, wherein the second link is further pivotably coupled with the body at a third pivot, wherein the third pivot is distal to the second pivot, wherein the first link has a distal portion and a proximal portion, wherein the first and second pivots are located at the distal portion, wherein the proximal portion includes a grip feature configured to be engaged by an operator to thereby drive the proximal portion toward the body , characterized in that the pivot assembly is configured to be attachable and detachable from the body , and in that the body comprises a pair of arcuate channels , and in that the first link comprises a pair of protrusions positioned to enter the pair of arcuate channels when the first link is rotated towards the body . (i) a first link , wherein the first link is pivotably coupled with the body at a first pivot, and (ii) a second link , wherein the clamp arm is secured to the second link , wherein the second link is distal to the first link , wherein the second link is pivotably coupled with the first link at a second pivot, wherein the second pivot is distal to the first pivot, wherein the second link is further pivotably coupled with the body at a third pivot, wherein the third pivot is distal to the second pivot, <EOS>