. Science of railways . Fia:. 4 Method of Applying Supplemental Springs—Mitchell Metallic Packing 392 LOCOMOTIVE APPLIANCES. Directions for Applying—1. Do not apply packing to rodsthat are cut or scored. 2. Packing may be applied to rods that are worn smoothand oval when not worn to exceed 1/64 per diametrical inchof the original diameter. 3. Bore packing 1/128 of an inch larger than the largestdiameter of the Fig. 5Mitchell Metallic Valve Stem Packing A—Oil —Swab —Swab Cup ——Joint —Babbitt Segments. T—Supplemental —Retaining ——Coil
. Science of railways . Fia:. 4 Method of Applying Supplemental Springs—Mitchell Metallic Packing 392 LOCOMOTIVE APPLIANCES. Directions for Applying—1. Do not apply packing to rodsthat are cut or scored. 2. Packing may be applied to rods that are worn smoothand oval when not worn to exceed 1/64 per diametrical inchof the original diameter. 3. Bore packing 1/128 of an inch larger than the largestdiameter of the Fig. 5Mitchell Metallic Valve Stem Packing A—Oil —Swab —Swab Cup ——Joint —Babbitt Segments. T—Supplemental —Retaining ——Coil —Guide Bushing. LOCOMOTIVE APPLIANCES. 393 4. The underlying ends of the segments of both packingrings should point in the same direction, either to the rightor left and joints should be quartered as shown in Fig. 2. 5. Under no circumstances should the joint ends of thesegments be filed or reduced. 6. Joint rings should be ground joint against gland. 7. Followers and joint rings should be mated by numbersas marked on these parts.
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