Introduction
Prereq only.
Tools
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Place the spacer collar around the pump rod below the raised chain, with the beveled side down, and the flat side facing up.
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Lift the pump handle until the base of the chain comes to rest on the spacer collar, and the chain is slack. Hold the handle in this position while the chain is being detached.
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Using the two access holes, place an angled socket wrench on the bolt and nut attaching the chain to the pump handle.
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Conclusion
To reassemble your device, follow these instructions in reverse order.