Suzuki DF 40, Service Manual

Page: 379 / 405

8 DF40QH / DF50QH
CYLINDER / PISTON / PISTON RING
0.06 (0.0024) mm (in.) Limit
Piston ring
end gap
mm (in.) 0.10 – 0.25 (0.0039 – 0.0098)
Cylinder distortion
Piston to cylinder
clearance
STD
Limit mm (in.) 0.70 (0.0276)
1st
mm (in) 0.25 – 0.40 (0.0098 – 0.0157) STD
Limit mm (in.) 1.00 (0.0394)
2nd
Item Unit
Data
DF40QH DF50QH
mm (in.) 0.020 – 0.040 (0.0008 – 0.0016) STD
Limit mm (in.) 0.100 (0.0039)
71.000 – 71.020 (2.7953 – 2.7961) mm (in.) STD
Cylinder bore
50 (1.969) from cylinder top surface mm (in.)
Cylinder measuring position
70.970 – 70.990 (2.7941 – 2.7949) mm (in.) STD
Piston skirt diameter
19 (0.748) from piston skirt end. mm (in.)
Piston measuring position
0.10 (0.039) mm (in.) Limit
Cylinder bore wear
Piston ring
free end gap
mm (in.) Approx. 7.5 (0.2953) STD
Limit mm (in.) 6 (0.2362)
1st
mm (in.) Approx. 11 (0.4330) STD
Limit mm (in.) 8.8 (0.3465)
2nd
Piston ring
groove width
mm (in.) 1.01 – 1.03 (0.0398 – 0.0406) 1st
mm (in.) 1.01 – 1.03 (0.0398 – 0.0406)
mm (in.) 1.51 – 1.53 (0.0594 – 0.0602)
2nd
Oil
Piston ring to
groove
clearance
mm (in.) 0.020 – 0.060 (0.0008 – 0.0024) STD
Limit mm (in.) 0.10 (0.0039)
1st
mm (in.) 0.020 – 0.060 (0.0008 – 0.0024) STD
Limit mm (in.) 0.10 (0.0039)
2nd
Piston ring
thickness
mm (in.) 0.97 – 0.99 (0.0382 – 0.0390)
STD
STD mm (in.) 0.97 – 0.99 (0.0382 – 0.0390)
1st
2nd
Pin clearance in
piston pin hole
mm (in.) 0.006 – 0.018 (0.0002 – 0.0007) STD
Limit mm (in.) 0.040 (0.0016)
Piston pin outside
diameter
mm (in.) 17.966 – 18.000 (0.7085 – 0.7087) STD
Limit
mm (in.) 17.980 (0.7079)
Piston pin hole
diameter
mm (in.) 18.006 – 18.014 (0.7089 – 0.7092) STD
Limit mm (in.) 18.040 (0.7102)
Pin clearance in
conrod small end
mm (in.) 0.003 – 0.015 (0.0001 – 0.0006) STD
Limit mm (in.) 0.05 (0.002)
Conrod small end
bore
mm (in.) 18.003 – 18.011 (0.7088 – 0.7091) STD
STD
STD
STD