Introduction
This guide will show you how to replace the riser main with the help of a tripod.
The riser main can, alternatively, be replaced using lifting spanners, but a tripod allows the process to be done by two people. Still use caution when using a tripod.
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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Remove the four bolts connecting the tank to the top flange.
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Use one wrench on the bolt and a second wrench on the nut beneath. Hold the bolt still and loosen the nut.
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Have a third person place the pipe vise around the riser main, on top of the top flange.
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Tighten the pipe vise securely around the riser main.
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Secure the pipe vise to the top flange with two bolts and nuts to hold the pipe vise in place.
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Insert the rod vise between the riser main and the tank, around the pump rod.
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Tighten the rod vise onto the pump rod.
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Screw the coupling onto the end of the riser main.
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Use a pipe wrench to tighten the coupling onto the riser main.
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Lower the tripod pipe vise to the top of the riser main.
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Close the tripod pipe vise around the riser main, and lock it shut.
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The rope operator's job is to pull hard on the rope to take up the slack, and announce that they've "got it," to let the vise operator know that they're holding the weight of the riser main.
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The vise operator will then announce "loosening," and loosen the pipe vise.
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The pipe vise operator then announces "tightening," and tightens the pipe vise.
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It is now safe to loosen and remove the tripod pipe vise.
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Repeat the lifting procedure: loosen the pipe vise and pull on the rope to raise the riser main another few feet.
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Lift the riser pipe until the first coupling clears the pipe vise.
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You will need to open the pipe vise wider to accommodate the coupling.
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Once the coupling is through the pipe vise, tighten the pipe vise.
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To reassemble your device, follow these instructions in reverse order.