5.5 Pistons and piston rings

To disassemble a piston:

LP piston

A Remove all cooler covers except the cover for the air outlet.

B Remove the cylinder cover. (It is not necessary to remove the valves.)

C Loosen the crankshaft bearing bolts and remove the crankshaft housing.

D Extract the piston and connecting rod from cylinder.

HP piston

A Loosen the crankshaft bearing bolts and remove the crankshaft bearing housing.

B Rotate the crank pin to the bottom and remove the connecting rod and piston through the crank case.

Reassemble in the reverse order.

Important: It is very important to protect the crank pins, since even minor damage may necessitate replacement of the crankshaft. Therefore, always wrap a cloth around the exposed crank pins while working in the crankcase.

Fig. 5.2 Piston rings