Parker pens have been around since 1941 when the first Parker 51 pen was released. These classic fountain pens can still be found in circulation. If you own one of these writing utensils, you may need to refill or clean the pen periodically. Although there are different styles and models of Parker Pens, the basic disassemble procedure is the same. The inner components may differ between styles, but these should come apart readily once you have disassembled the outer body of the pen.
Soak the pen in warm water before disassembling it if ink has dried in it. The length of soaking time depends on how long it takes to soften the ink that is dried in the pen. Flush the pen with running water to remove any residue once the ink has softened sufficiently.
Hold the pen in one hand as you slowly heat the hood of the pen near the clutch ring. The hood and clutch ring area is where the two main outer pieces of the pen screw together, approximately one-third of the way down from the cap. You will see a small rubber ring where the two pieces of the pen join together. Heat that area of the pen for about a minute, rotating as you go. You can use a hairdryer, or a commercial heat gun on a very low setting.
Grasp the clutch ring and nib section of the pen (the cap end of the pen) with one hand. Twist the barrel in a counterclockwise direction to release the hood. Once you release the hood slightly, look to see if there is a rubber O-ring between the clutch ring and hood. If there is, twist the hood clockwise and then counterclockwise. Repeat this twisting motion until the O-ring sticks to the hood and allows the hood to be unscrewed from the pen.
Pull the collector out of the pen. The collector extends through the middle of the pen and has a slit up the side of it. Grab the tube feed that is in the collector and pull that out as well.
Disassemble the cap by unscrewing the end screw in a counterclockwise direction using a Phillips screwdriver.