GENERAL INFORMATION 1-11
CYLINDER / PISTON / PISTON RING
0.060 (0.0024)
mm (in)
Limit
Piston ring
end gap
mm (in)
0.15 – 0.30 (0.006 – 0.012)
Cylinder distortion
Piston to cylinder
clearance
STD
Limit
mm (in)
0.70 (0.028)
1st
mm (in)
0.20 – 0.35 (0.008 – 0.014)
STD
Limit
mm (in)
0.70 (0.028)
2nd
Item
Unit
Data
DF60T
DF70(W)T/70WTH
mm (in)
0.020 – 0.040 (0.0008 – 0.0016)
STD
Limit
mm (in)
0.100 (0.0039)
74.000 – 74.020 (2.9134 – 2.9142)
mm (in)
STD
Cylinder bore
50 (2.0) from cylinder top surface
mm (in)
Cylinder measuring position
73.970 – 73.990 (2.9122 – 2.9130)
mm (in)
STD
Piston skirt diameter
15 (0.6) from piston skirt end.
mm (in)
Piston measuring position
0.100 (0.0039)
mm (in)
Limit
Cylinder bore wear
Piston ring
free end gap
mm (in)
Approx. 7.7 (0.30)
STD
Limit
mm (in)
6.1 (0.24)
1st
mm (in)
Approx. 10.4 (0.41)
STD
Limit
mm (in)
8.3 (0.33)
2nd
Piston ring
groove width
mm (in)
1.22 – 1.24 (0.048 – 0.049)
1st
mm (in)
1.51 – 1.53 (0.059 – 0.060)
mm (in)
2.81 – 2.83 (0.111 – 0.112)
2nd
Oil
Piston ring
to groove
clearance
mm (in)
0.03 – 0.07 (0.001 – 0.003)
STD
Limit
mm (in)
0.12 (0.005)
1st
mm (in)
0.02 – 0.06 (0.001 – 0.002)
STD
Limit
mm (in)
0.10 (0.004)
2nd
Piston ring
thickness
mm (in)
1.17 – 1.19 (0.046 – 0.047)
STD
STD
mm (in)
1.47 – 1.49 (0.058 – 0.059)
1st
2nd
Piston pin oil
clearance
mm (in)
0.003 – 0.016 (0.0001 – 0.0006)
STD
Limit
mm (in)
0.040 (0.0016)
Piston pin outside
diameter
mm (in)
16.995 – 17.000 (0.6691 – 0.6693)
STD
Piston pin hole
diameter
mm (in)
17.003 – 17.011 (0.6694 – 0.6697)
STD
