Introduction
The internal loading mechanism can undergo a lot of stress during operation and can break as a result. Replacing the assembly is a much easier and efficient fix than any individual part. A screwdriver with a long shaft will be needed to get to all of the screws. Also watch out for any small parts that may come apart and fall out as you're working on the device.
Tools
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Start by taking out all of the screws for the casing of the gun. Using the PH #00 screwdriver, unscrew all four 1.3 cm screws in the pump.
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Remove the 1.2 cm Phillips screw and the silver 1.1 cm Phillips screw at the front of the gun.
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Remove the silver 1.1 cm Phillips screw next to the first screw.
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Conclusion
To reassemble your device, follow these instructions in reverse order.