COVER 8P4693 - Caterpillar

Measuring Flange Thickness
Flange Thickness for Top Supported Liners
Measure the thickness of the flange with a micrometer. Thickness of the flange must meet the dimensions in Table 7 for reuse.
Illustration 52 g02020697Flange Thickness for Mid-Supported Liners
Measure the thickness of the mid-support with an outside micrometer. The thickness of the mid-support must meet the dimensions in Table 8 for reuse.
Illustration 53 g06290442
(A) Mid-support thicknessMeasuring Liner Bore
Before measuring the liner bore, the liner must first have passed a complete visual inspection. The measuring of the liner bore is to determine if the liner is out of round. Maximum reuse specifications can be found within Tables 7 and 8.Gauges For Measuring
Illustration 54 g06290448
Typical example of dial bore gauge set.
Bore diameters should be measured with a dial bore gauge that has been accurately calibrated with a master ring or a fixture for setting the gauge.For instructions on how to use a dial bore gauge set, refer to Special Instruction, SMHS8253, "Use of the 6V-7898 Dial Bore Gauge". Use the 1P-3537 Dial Bore Gauge.Record the part number of the cylinder liner and the sequence numbers for the inspection process. Keep a log of history or a permanent record by sequence number of the cylinder liner for any measurements that are taken for future reference.Measuring Procedure
Illustration 55 g06290453
Typical diameter measuring locations.
Measure the bore of the cylinder liner at three points on the horizontal plane that are 45° apart. Repeat this measuring procedure three separate times on the vertical plane. The measurements should be taken at the top end of the stroke, the middle, and the lower end of the stroke. Refer to Illustration 55.
Illustration 56 g01838754
Measure the inside diameter of the liner with a dial bore gauge.
If all the measurements of the bore are acceptable according to Tables 7 and 8, then the liner can be used again.
Determine the wear of the diameter of the cylinder liner bore by taking three sets of measurements that are 45° from each other in three different locations in the cylinder liner. One set of measurements should be taken at the upper end of the cylinder liner at the point of the maximum wear. The second set of measurements should be taken in the middle of the liner. The last set of measurements should be taken at the lower end of the liner. Record this information for future reference.
It is important to maintain the dimensions that are listed in Tables 7 and 8.Liner Storage
Storage of the cylinder liners requires some special attention to avoid destroying a reusable liner.
Always protect the liners in storage.
Never store liners in a dirty condition as this practice will accelerate rusting and corrosion of the machined surface.
Always use a rust preventative or a light film of clean engine oil to protect the clean liner.
Never store the liner on its side. Doing so will gradually deform the liners into an out of round shape.