Service Manual

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).
Figure 209
Piston ring No. 1
Piston ring No. 2
Figure 210
4. Apply an ample amount of engine oil to piston outside
Side rail
No. 1
surfaces, piston rings and oil ring. Position piston rings
and oil ring (side rails and spacer) end gaps as shown.
Piston pin
No. 2 Spacer
Side rail
Figure 211
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.
Figure 212
Liquid Cooled
Gas Engine
Workman 3000/4000 Series
Page 3 – 99
Liquid Cooled Gas Engine