Cyclopedia of automobiles, gas and oil engines and farm tractors; a complete manual of practical information for owners and drivers of automobiles, ... on electric light and water supply system

Description

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ...The operation of valve grinding consists of placing a small amount of the grinding compound evenly on the face but not very thick. What you can easily pick up on the tip of a pocket knife blade is plenty at one time. The valve is now placed in the cylinder or part that it came out of so that the face rests on the seat. Now take the tool that turns the valve and turn the valve about half way around and then back again. Do this several times. Do not use much pressure as the pressure forces the grinding compound from between the face and seat and makes the work slower. After making several half turns the valve head must be raised and turned to a new position while it is not touching the seat, and then the operation is repeated. If you do not raise the valve from the seat every few half turns you will make ridges on the face and spoil the job. Also, if you turn the valve round and round without reversing the motion and raising it you will spoil the work. In order to raise the valve from the seat every once in a while you can take a light spring that fits around the stem and place it on the valve stem just under the head. This spring should rest on the metal of the cylinder at its lower end and hold the valve about a half inch off the seat. When you press on the valve grinding tool the valve will be pressed down onto the seat, but when you release the pressure it will raise again and you can turn to a new position without pushing up on the stem from below. The valve must be ground for a few minutes and then washed off and carefully examined. When the face and seat are a clean even light gray all around and have no marks or pits or rings at any point the job is finished. The next thing to do is to test the valve for tightness. This can be done by placing pencil m...