Page:Motors and motor-driving (1902).djvu/266

234 inclined plane formed by the lower lever, as in fig. 14. Withdraw the upper lever, and, by raising the other lever, force the cover into the rim, afterwards tucking the edge beneath the hook by reiterated pressure from the point.

As each bolt is reached it should be pushed upwards as far as it will go when the winged nut is unscrewed to the last limit, and when the cover is in position all the way round these bolts should be worked up and down to determine whether the tube be nipped. The movement will, in that event, release the tube, and the bolt should come back much as the key of a pianoforte after pressure from the finger. If the bolt cannot be pushed upwards the beaded edge is not accurately bedded.

It now remains to ensure that the air-chamber is nowhere nipped. Seize the cover with both hands, and with the thumbs force the beaded edge towards the centre of the rim. Make the circuit of the tyre in this way, and if the red tube be nowhere visible it is not nipped, but if it project at any point it must be pushed inwards with the lever.

The tyre may now be inflated, care being taken, in order to avoid wasted effort, that there is no leakage between the nozzle of the pump and the milled cap into which it is screwed, or between the latter and the rubber pipe, or between the nozzle and the valve. After inflation see that the valve nut and the winged nuts are tight to the rim, or wet will penetrate to the tyre.