Toro Workman 3000 Series Service Manual page 137

3. Use a ring expander to Install No. 2 and No. 1 piston
rings. Pay attention to difference in shape between No.
1 and No. 2 rings. Install rings with marks facing up (to­
wards top of piston).
4. Apply an ample amount of engine oil to piston outside
surfaces, piston rings and oil ring. Position piston rings
and oil ring (side rails and spacer) end gaps as shown.
5. Insert piston and connecting rod assembly into cylin­
der, working from cylinder top surface. Make sure front
mark (arrow) stamped on piston top surface faces the
camshaft sprocket side.
Workman 3000/4000 Series
Side rail
No. 2 Spacer
Page 3 – 99
Figure 209
Piston ring No. 1
Piston ring No. 2
Figure 210
No. 1
Piston pin
Side rail
Figure 211
Figure 212
Liquid Cooled Gas Engine