Pump, ready for the dump

This asthmatic car tyre pump came in to the workshop with little going for it.  The owner had been very close to throwing it away when he came across my website.

This AirMan pump is designed to be plugged in to a car’s cigarette lighter socket and provide quick and convenient car tyre inflation.  This one was dead.

On first inspection, the fuse was OK, the switch seemed to work and all connections seemed sound, when tested with a multi-meter.

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FixItWorkshop, Worthing, May’17 AirMan Car Tyre Pump, repaired

Off with the cover…

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FixItWorkshop, Worthing, May’17 AirMan Car Tyre Pump, repaired- cover removed

When the motor was removed from the cam driving the piston, the bit that drives the pump, it spun freely when power was applied, using a battery in the workshop.

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FixItWorkshop, Worthing, May’17 AirMan Car Tyre Pump, repaired- gear wheel

Seemingly, the centre spindle was protruding far beyond it’s specified reach, causing the pump connection rod to it it during rotation.  Why?  To be frank, I wasn’t sure. I can only surmise that the vibration and heat had caused the flywheel/ toothed drive to slide outside of specification.

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FixItWorkshop, Worthing, May’17 AirMan Car Tyre Pump, repaired- washer

There appeared to be room for a small washer to take up the excess space, so I fitted one I had lying around.

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FixItWorkshop, Worthing, May’17 AirMan Car Tyre Pump, repaired- pump now in line with washer

The washer, once fitted, allowed the flywheel/ toothed drive to sit ‘square’ in-line with the pump.

Once resembled, the pump ran freely and was ready to inflate, once more.

Cost of a new pump, circa £20.  Cost of the washer, circa 5p.

Dyson DC14 roller bearings and block/ bypass relief valve

This Dyson DC14 came into the workshop with a couple of problems.  The first was a lack of suction power and the second was a horrible noise from the front of the vacuum cleaner.  It got to the workshop just in time.

A bypass valve is fitted to most vacuum cleaners without a bag and is there to prevent damage if a blockage exists somewhere in the airways or the owner has neglected to empty the collection bin.  In this case, the valve seemed to be stuck open, causing suction power to be lost.

The valve on the DC14 (other Dyson models are similar) is a small device situated near the exhaust filter.  the valve itself is a clear tube with a rubber sealed cap controlled by a spring.  In normal operation, the cap seals a hole to the outside world, but if there’s a blockage, the pressure of the spring is overcome and air is allowed past the cap.

In this case, the valve was dirty and stuck.  Repair required dismantling with normal household tools (small screwdriver and pliers) and cleaning using a damp cloth.  A small squirt of silicone spray on the rubber seal ensured a smooth operation upon reassembly.

 

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FixItWorkshop April’17, Dyson DC14, repaired in the workshop

The noise was traced to the front of the vacuum cleaner.  The roller/ beaters were making a horrible noise when in use and it wouldn’t have been too long before complete failure would have occurred.

Spare roller/ beaters are readily available from Dyson directly and from many aftermarket suppliers at reasonable prices.  Since the beaters were in good condition, it seemed reasonable to have a go at a repair.  The small ball bearing races at each end of the beater are easily removed and upon inspection, both were very stiff in operation.  Fortunately, the bearings used by Dyson were of good quality and as the dust covers were easily removed, all that was required was a clean with solvent cleaner and a re-grease.  Once refitted, the roller/ beaters sounded as they should again.

Cost of a replacement Dyson vacuum cleaner, circa £250, cost of repair £1 (bit of cleaner, grease, silicone spray.