Check the wear on the end of the rod and measure the amount of its protrusion from the mechanism.
If there are any defects, the mechanism must be replaced.
Note: The tensioner must be stored in an upright position until installation.
Installation of automatic tensioning device
Before installing the automatic tensioner mechanism, it is necessary to remove air and temporarily lock the rod. To do this: install the tensioner in a vertical position and use a press to smoothly compress it so that the rod protrudes approximately 0.5 mm from the mechanism body. Perform this operation 2-3 times.
Caution: The piston rod must be compressed slowly to avoid damaging the mechanism.
After removing the load from the rod, check the rigidity of the mechanism. When applying a load of 100-200 N, the rod should protrude from the body by 5 mm. If sufficient rigidity is not achieved, it is necessary to repeat the air removal operation or replace the mechanism.
Press the rod and, aligning holes (A) and (B), insert a pin or wire with a diameter of 1.4 mm into them to fix the rod.
Note: The automatic tensioner mechanism rod supplied as spare parts is secured with a pin.
(The article is reprinted from this source: «mitsubishiman.ru»)