Toro Groundsmaster 300 Series Service Manual page 92

NOTE: Before insertion apply engine oil to the piston pin
O.D. and the connecting rod small end inside diameter.
10. To assemble the piston to the connecting rod, press
the piston pin into the set position. Use the piston pin
setting tool. Make sure the identification mark of the rod
and and the arrow mark on the piston head are di-
rected up.
Pin press fitting force: 500 - 1500 kg (1100 - 3300 lb.)
NOTE: The piston and piston pin are matched parts and
should not be mixed.
After assembling the piston and connecting rod make
certain that the connecting rod small end is properly
positioned at the center of the piston pin.
11. Install the piston rings.
IMPORTANT: The piston rings differ in shape from
one another. Be careful to install them in proper
position and with the ring gaps in the directions as
illustrated. In the case of the oil ring with the coil
expander, the gap clearance of the ring should be
positioned 180° away from the joint of the expander.
NOTE: Install the piston rings with the stamped manu-
facturer mark facing up.
Cylinder Block Overhaul
Ring gap positions
Page 4 - 62
Figure 83
Installing piston rod
Figure 84
Piston ring shapes
®
Groundsmaster 300 Series