TM 5-2420-230-24-2
Piston (001-043)
B3.9 and B5.9 Series Engines
Page 1-82
Section 1 - Cylinder Block - Group 01
Inspect for Reuse (001-043-007)
Inspect the piston for damage and excessive wear. Check
the top, ring grooves, skirt, and pin bore.
NOTE: If severe piston damage has occurred, check the
turbocharger and other exhaust components for damage
from debris.
Measure the piston skirt diameter as illustrated.
Piston Skirt Diameter
mm
in
101.823
MIN
4.0088
101.887
MAX
4.0107
Measure the pin bore.
Piston Pin Bore Diameter
mm
in
40.006
MIN
1.5750
40.025
MAX
1.5758
Piston Pin - Inspection
Inspect the piston pin for nicks, gouges, and excessive
wear.
Measure the pin diameter.
Pin Diameter
mm
in
39.990
MIN
1.5744
40.003
MAX
1.5749
L-760