Toro Workman 3000 Series Service Manual page 223

8. Measure the piston outside diameter (Fig. 84). (See
Cylinder Block in this section).
Maximum piston to cylinder wall clearance:
0.3 mm (0.012 in.)
9. Use a thickness gauge to check the piston ring side
clearance (Fig. 85).
If the piston ring side clearance exceeds the service
limit, the ring must be replaced. If the clearance still does
not meet specifications with a new ring the piston must
be replaced. (See the Specifications section of this
chapter.)
10. Measure the piston ring end gap. Insert the ring into
the least worn area of the cylinder by pushing it into
place with the piston (Fig. 86). If the gap exceeds 1.5
mm (0.060 in.) the ring must be replaced.
Workman 3300-D/4300-D Page 4 - 73
Figure 84
Figure 85
Figure 86
Liquid Cooled Diesel Engine