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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Remove the two bolts from the handle side of the pump head.
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Use one wrench on the bolt and another on the nut beneath. Hold the bolt stationary and loosen the nut.
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After removing the two handle side bolts, have your partner support the weight of the handle.
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Remove the two remaining bolts in the same fashion.
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Slightly twist the head flange, until the corners overhang the top of the tank far enough to grab.
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Unscrew the chain from the top of the pump rod.
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Remove the chain.
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Check the chain for signs of wear or damage.
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To reassemble your device, follow these instructions in reverse order.