D342 INDUSTRIAL & MARINE ENGINES Caterpillar

(1) Clearance between top ring and groove ... .0046 to .0064 in.(0.117 to 0.163 mm)

(2) Clearance between center ring and groove ... .0030 to .0048 in.(0.076 to 0.122 mm)

(3) Clearance between oil ring and groove ... .0015 to .0030 in.(0.038 to 0.076 mm)

(4) Bore in piston for pin ... 2.3906 ± .0003 in.(60.721 ± 0.008 mm)

Maximum permissible clearance between piston pin and bore in piston ... .002 in.(0.05 mm)

Clearance between ends of piston ring installed in cylinder liner with bore size of ... 5.750 in.(146.05 mm)

(5) ^*Top ring ... .0305 ± .0075 in.(0.775 ± 0.191 mm)

(6) Center ring ... .0285 ± .0075 in.(0.724 ± 0.191 mm)

(7) Oil control ring (bottom ring) ... .025 ± .005 in.(0.64 ± 0.13 mm) ... .003 in(0.08 mm)

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^*Increase in clearance between ends of piston ring for each .002 in. (0.03 mm) increase in cylinder liner bore size