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How to use a boiler pump multitool?

How to use a boiler pump multitool?

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Holding the multitool

Image showing a DIYer holding a multitool The handle of the multitool should be held inside your fist, with your fingers wrapping around the grip on the bottom of the handle. The shaft of the multitool should be protruding from the gap between your fingers.
Image showing how to hold a corkscrew/boiler pump multitool If you’re old enough to be a wine drinker, then you’ll find this very similar to holding a corkscrew, in terms of grip.

Power off

Image showing a DIYer turning off the electrical power supply at the fuse box Before you do anything to your boiler pump, make sure the power is switched off and cannot be accidentally reconnected.

Tightening and loosening retaining screws

Image of an allen key bit You’ll need to choose one of the allen key bits for the multitool. Check which size fits the screw you want to tighten or loosen and slide it into the bit holder so that your chosen tip is sticking out of the holder.
Image of a DIYer using a boiler pump multitool to loosen the retainer bolts on a boiler pump head Insert the tool bit into the screw.

Turn it clockwise to tighten it and anti-clockwise to loosen it.

Tightening and loosening a bleed screw cover plate

Image of a multitool ready to be used to undo a bleed screw cover plate, with the bit in the bit holder removed For this task, you will need to remove the bit that is currently in your bit holder and flip the tool upside down.
Image of DIYer unscrewing the bleed screw coverplate on a boiler pump Insert the wide, flat bit on the handle into the groove in the bleed screw.

Twist anti-clockwise to loosen it and clockwise to tighten it.

Image of a boiler pump with a smaller bleed screw coverplate that can be opened using a 4mm flat screwdriver bit If your bleed screw is smaller, don’t worry about flipping your tool. Just use the flat 4mm bit.

Turning the rotor shaft

Image of a DIYer unscrewing a bleed screw coverplate To access the rotor shaft, you will need to remove the bleed screw cover plate using the flat bit on the handle of the multitool.
Image showing the slot in the impellor shaft that can be turned using a flat screwdriver If you look into the slot you just exposed, you should see a groove where you can insert a flat screwdriver bit.
Image of a DIYer turning the impellor shaft inside a boiler pump with a screwdriver Fit the bit holder with the 4mm (5/32″) flat screwdriver bit. Gently turn the rotor shaft anti-clockwise. You should now be able to tell whether or not the impellor moves smoothly or if there is something jamming it.

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