D330, D333, 3304, 3306 – Piston And Rings Specifications

Maximum permissible clearance between ring and groove (all rings) … .006 in.(0.15 mm)

(1) Clearance between top ring and groove … .0037 ± .0009 in.(0.094 ± 0.023 mm)

(2) Clearance between center ring and groove … .0032 ± .0009 in.(0.081 ± 0.023 mm)

(3) Clearance between oil ring and groove … .0024 ± .0009 in.(0.061 ± 0.023 mm)

(4) Bore in piston for pin:

5S9017 Piston … 1.5011 ± .0002 in.(38.128 ± 0.005 mm)

2P6271 Piston … 1.7006 ± .0003 in.(43.195 ± 0.007 mm)

7S6792 Piston … 1.7006 ± .0003 in.(43.195 ± 0.007 mm)

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

Clearance between ends of piston ring installed in cylinder liner with bore size of … 4.750 in.(120.65 mm) *

(5) Top ring … .0245 ± .0075 in.(0.622 ± 0.191 mm)

(6) Center ring … .0245 ± .0075 in.(0.622 ± 0.191 mm)

(7) Oil control ring (bottom) … .018 ± .005 in.(0.46 ± 0.13 mm) … .003 in.(0.08 mm)

*Increase in clearance between ends of piston ring for each .001 in. (0.025 mm) increase in cylinder liner bore size

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