Fig. 2-56. Sectional view of chain tensioner:
1 - cap nut; 2 - tensioner housing; 3 - rod; 4 - plunger spring; 5 - washer; 6 - plunger; 7 - spring; 8 - cracker; 9 - spring ring; A - plunger surface; B - places of punching on the end of the body.
Turn 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 nut 1 of the tensioner, due to which rod 3 is clamped by the collets of cracker 8, and when the engine is running, only spring 4 acts on plunger 6. This spring presses the plunger away from the head of rod 3, and oil flows into the gap between them when the engine is running, acting as a shock absorber when the chain hits.