BI001519
Replacement of wear parts _________________________________________ Measure Chain for Elongation One of the most important areas in the evaluation of chain wear is the elongation of the chain. This is obtainable in the field and does not require chain disassembly or return to manufacturer for analysis. To measure a chain for elongation: The selected strand must be under some load to pull out internal clearances and must be supported, if necessary, to insure the chain lies in a straight line. The selected strand should include as many pitches as possible, with a minimum of four pitches. Always use an even number of pitches for straight sidebar chain. Use any reasonably accurate measuring device (steel ruler, calipers, tape measure, etc.). Determine the distance from a spot on the first pitch to the same spot on the last pitch. The edge of the pin head is usually a good spot to measure (see Fig. 73). Fig. 73: Chain elongation measurement
________________________________________________________________ Cat® FB110 Feeder Breaker 5.112
