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Updated: May 20, 2025
These bearings require extremely little attention, and do not show the wear and tear of running nearly so soon as the connecting-rod brasses. These, too, are usually of brass or gun-metal; but there are various forms of construction employed in connection with the back end or piston pin bearings.
Later he said he saw that Tom was coming down at too great an inclination, and he feared that the machine could not be thrown up into the wind quickly enough! "Here goes something the lever or the rudder!" cried Tom in desperation, as he gave it a mighty yank. Up to now he had not pulled with all his strength as he feared to break some connecting-rod, wire or lever.
Ignition is by two high-tension magnetos, and a compressed air self-starting arrangement is provided. Two oil pumps are fitted for lubricating purposes, one of which forces oil to the crankshaft and connecting-rod bearings, while the second forces oil to the valve gear, the cylinders being so arranged that the oil which flows along the walls cannot flood the lower cylinders.
The rack that advances the deals to the saws passes through a "bow" in the connecting-rod and the middle of the frame, the deals are placed on either side of it, on rollers purposely provided. In sawing hard deals, the saws require to be sharpened about every tenth run or journey, and every twentieth for soft.
It had been intended to cross her bows, and that was why it knocked the framed portrait of the Chief Engineer's wife and she was a very pretty girl on to the floor, splintered his wash-hand stand, crossed the alleyway into the engine-room, and striking on a grating, dropped directly in front of the forward engine, where it burst, neatly fracturing both the bolts that held the connecting-rod to the forward crank.
She was a large paddle-wheel steamer of two thousand five hundred tons, well-equipped and very fast. The massive walking-beam rose and fell above the deck. At one end a piston-rod worked up and down. At the other was a connecting-rod which, in changing the rectilinear motion to a circular one, was directly connected with the shaft of the paddles.
Wardrop's voice rose and fell echoing, till the quick tropic night closed down over the engine-room skylight. Next morning the work of reconstruction began. It has been explained that the foot of the connecting-rod was forced against the foot of the starboard supporting-column, which it had cracked through and driven outward towards the ship's skin.
There the connecting-rod jammed. Meantime, the after-engine, being as yet unembarrassed, went on with its work, and in so doing brought round at its next revolution the crank of the forward engine, which smote the already jammed connecting-rod, bending it and therewith the piston-rod cross-head- the big cross-piece that slides up and down so smoothly.
In conclusion, he disconnected the after-engine, laid piston and connecting-rod, carefully tallowed, where it would be most inconvenient to the casual visitor, took out three of the eight collars of the thrust-block, hid them where only he could find them again, filled the boilers by hand, wedged the sliding doors of the coal-bunkers, and rested from his labours.
But I had not much time to give him, because I was helping the engine-driver to take to pieces the leaky cylinders, to straighten a bent connecting-rod, and in other such matters. I lived in an infernal mess of rust, filings, nuts, bolts, spanners, hammers, ratchet-drills things I abominate, because I don't get on with them.
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