D379, D398, D399 INDUSTRIAL & MARINE ENGINES Caterpillar

(4) Bore in piston for

pin ... 2.4506 ± .0003 in.(62.245 ± 0.008 mm)

Clearance between pin and bore in piston (new) ... .0003 to .0012 in.(0.008 to 0.030 mm)

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

Torque for nut on heat plug ... 30 ± 5 lb. ft.(40 ± 7 N·m)

NOTE: When installed in the engine, the "V" mark on top of the piston must be in alignment with the "V" mark on the cylinder block.