PowerTech 6105HF - Check Piston Oil Control Ring Groove Wear-6105 and 6125 Engines

Cylinder Block, Liners, Pistons, and Rods
02
030
24
RG,RG34710,117 –19–01NOV00–1/1
Check Piston Oil Control Ring Groove
Wear—6105 and 6125 Engines
RG5234 –UN–05DEC97
Measuring Oil Control Ring Groove Wear
NOTE: Piston and ring sizes differ between engines.
Piston part numbers are marked on top of pistons
for identification.
Early Engines
Engine Piston Oil Control Ring
Size
10.5 L RE52836, RE504801 4.8 mm
12.5 L RE66125 4.8 mm
Later Engines
10.5 L RE504343 4 mm
12.5 L RE503969, 4 mm
RE505901
1. Check oil control ring-to-groove clearance by installing
a new ring in groove.
2. Measure clearance with a feeler gauge at several
points. Compare measurements with specifications
given below.
Specification
Oil Control Ring-to-Groove
(RE52836, RE504801, RE66125
Pistons)—Clearance 0.064—0.114 mm
(0.0025—0.0045 in.)
......................................................
Maximum Clearance 0.165 mm (0.0065 in.)...............................................
Oil Control Ring-to-Groove
(RE504343, RE503969 and
RE505901 Pistons)—Clearance 0.041—0.091 mm
(0.0016—0.0036 in.)
....................................
Maximum Clearance 0.132 mm (0.0052 in.)...............................................
NOTE: Replace piston and liner (as a set) if oil control
ring clearance exceeds specifications given.
CTM100 (06APR04) 02-030-24 P OWER T ECH 10.5 L & 12.5 L Diesel Engines
040604
PN=164