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3rd March 1925, Page 26
3rd March 1925
Page 26
Page 26, 3rd March 1925 — HINTS ON MAINTENANCE.
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Which of the following most accurately describes the problem?

How to Get the Best Out of a Vehicle, to Secure Reliability and to Avoid Trouhle.

606.—Facilitating the Removal of the Clutch on the Chevrolet.

In order to release the spring of the OhevroIet clutch, it is necessary to remove the pin (A) shown in our illustration, but difficulty is sometimes ex

perienced in depressing the spring (B) for this to be effected.

To facilitate this operation, a piece of strong tube is cut with slots so as to clear the Pin. This may be inserted inside the spring housing to• bear against the washer at the end of the spring.

Two 4-ia, by bolts (D) must be used in conjunction with two tubular distance pieces (B) to depress the spring to the amount necessary for the removal of the pin. The loose collar of the gear

shaft is utilized as a base for the slotted tube, which presses against the clutch spring washer.

607.—Jointing for Leyland Boilers.

We recently had an inquiry from a reader who had experiencedtrouble with the joints of the boiler of a Leyland steam wagon. We are informed by Leyland Motors, Ltd., that the correct jointing to employ is sheet asbestos, -A. in, thick, cut into segments and each end tapered 1 in. for overlapping. Prior to fitting, these segments should be immersed in hot water for two or three minutes, which renders them pliable and, therefore, easier to manipulate.. If this jointing be used in the correct manner, no troubles, such as weeping, will occur.

608.—Replacing Dennis Valve Guides.

The replacement of the vatve guides on the Dennis engine, when these become unduly worn, ia sometimes a matter of difficulty and often necessitates the lifting of the cylinders, but this may be avoided in the following manner.

Take out the valve cap, valve, etc., from the guide which is to be removed, place a piece of rag in the port to stop any pieces of metal from falling into the cylinder, and split off the top of the guide by means

of a chisel, care being taken not to damage the surrounding material. Then, by the use of a large punch the guide can be driven down and out and the new part fitted. This may require a little easing off so that it is not too tight a driving fit, but care must be taken not to make it too small for the washer on the other side. i When driving n the new guide the material to use is a piece of hard wood ;this will avoid damaging it.

609.—A Spark Arrester for Sentinel Wagons.

After a lengthy test with various types of spark arrester on a fleet of 6-ton Sentinel steam wagons, it was decided to adopt the wire-screen type, which is shown in the accompanying illustrations.

A good arrester was particularly important in this instance, as the vehicles had to carry cotton.

This device can easily be made. The long wires are No. 10 S.W.G. galvanized steel, each piece being cut 19i ins. long. Thirty-four pieces are required. The three rings are made to the required dimensions from 1-in. and T--in. diameter steel wire, the 1-in. wire being used for the top ring. These rings, after being formed to the right sizes, should have a piece of tin plate or metal tubing driven tightly over the ends at the joints, so that the ends are held firmly in position while the long wires are being secured. The ends of the long wires should be formed into eyes fitting tightly over the top and bottom rings, whilst the centre ring should be placed evenly and held securely by binding it with No. 20 galvanized wire. It is better to treat the top and bottom rings in•a similar manner.

Finally, cut eight pieces.of wire 4 ins, long, bend both ends to fit over the bottom ring, and close them down tightly as shown at A.


People: Dennis Valve

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