Pic. 2-56. Chain tensioner section:
1 - cap nut; 2 - tensioner body; 3 - rod; 4 - plunger spring; 5 - washer; 6 - plunger; 7 - spring; 8 - cracker; 9 - spring ring; A - plunger surface; B - places of punching at the end of the body.
Rotate the crankshaft 1-1.5 turns in the direction of rotation. In this case, the tensioner spring acting on the shoe will automatically adjust the chain tension.
Tighten the nut 1 of the tensioner, due to which the rod 3 is clamped by the collets of the cracker 8, and when the engine is running, only the spring 4 acts on the plunger 6. This spring presses the plunger from the head of the rod 3, and oil flows into the gap between them during engine operation, which plays the role of a shock absorber during chain strikes.