CUMMINS N14 Especificações descarregar pdf (Página 210)

100

101

Inspection

Visually inspect the piston bowl, the pin bore, and the skirt

for cracks or damage.

Use crack detection kit, Part No. 3375432, or equivalent

to check for cracks on the top of the piston and in the

piston pin bore.

NOTE: Do not use pistons with dome cracks larger than

one-half (1/2) the rim width or with cracks which extend over

the rim toward the ni-resist insert. Do not use pistons with

dome cracks in the rim above the pin bore axis. Do not use

pistons with cracks in the piston pin bore. Do not use pistons

with scuff marks, visually unacceptable scratches or cracks

in the skirt. If pistons are unacceptable for reuse, do not use

the mating piston pins. Cummins recommends replacing

pistons and pins in sets.

Visually inspect the piston ring lands and ring grooves for

wear. A worn groove will have a detectable step at the

back of the groove and a rolled edge at the surface of the

piston or the ring groove outside diameter. Pistons ex-

hibiting this wear are not acceptable for reuse.

Refer to the Parts Reuse Guidelines, Bulletin No. 3810303.

Use piston ring groove wear gauges, Part No. 3823870,

3823869, and a 5-6 inch micrometer, to inspect the top

and second grooves (compression rings).

NOTE: The piston must be replaced if measured dimen-

sions are less than those in the table below.

Measure each ring groove (diameter over pins) when the

piston temperature is at 21°C [70°F] in two places 90

degrees apart as shown.

Ring Groove Wear Limits (Diameter Over Pins)

mm in

Top Ring Groove: 140.2 MIN 5.515

2nd Ring Groove: 140.1 MIN 5.514

Pistons - Cleaning and Inspection (01-07) Cylinder Block

N14Page 1-42

1 2 ... 205 206 207 208 209 210 211 212 213 214 215 ... 586 587

Comentários a estes Manuais

Jesus Morales 03 Apr 2025 | 23:07:31

Perfect..

CUMMINS N14 Especificações Página 210

Comentários a estes Manuais