Insert the piston pin into the heated piston and connecting rod head by hand using a rod (figure 205).
When assembling the piston and connecting rod, the following recommendations must be followed:
- the arrow on the piston bottom (painted or knocked out in a new piston) should point towards the front of the engine;
- lugs on the lower head and connecting rod cover (see figure 201) must be located on the intermediate shaft side.
The cylinder number marks on the lower head and connecting rod cap must match (see figure 65).
Insert the retaining rings on both sides of the piston pin and check that they are tightly seated in the grooves.
Check whether the piston rotates easily relative to the piston pin when assembled.
Using special pliers for removing and installing piston rings or the already mentioned steel strips (see figure 203) insert the rings into the grooves under the rings. When the ring is above the groove, the steel plates should be removed, allowing it to enter the groove. Before installing the piston rings, it is necessary to pay attention to the shape of their cross-section, so as not to mix up the rings. In addition, both compression rings have the inscription "TOP" or "OBEN" stamped on one side, which should face the piston bottom.
The pistons with the rings installed in them must be placed on a clean surface and covered with a lint-free material to prevent dirt from getting on them.
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