Rocker arm clearance removing device

In a rocker arm clearance removing device wherein torque is applied by a hydraulic adjuster to an eccentric cam which supports a rocker arm and the resulting rotation of the eccentric cam causes the rocker arm to come into pressure contact with a valve operating cam and intake valve or an exhaust valve, the improvement wherein the eccentric cam is supported by a rocker arm shaft extending through an eccentric position of the cam;

• an outwardly extending, pressure bearing arm is provided curving in the rotating direction of said arm and having a pressure bearing surface extending substantially tangentially to said eccentric cam and facing in a direction opposite to said rotating direction, said pressure bearing arm projecting from an end portion of the eccentric cam;
• and the hydraulic adjuster, which has a pressurizing surface for abutment with said pressure bearing surface, is disposed nearly perpendicularly to said pressure bearing surface, and wherein a radially extending engaging piece is projectingly provided on said end portion of the eccentric cam circumferentially spaced from said pressure bearing arm;
• an arm stopper is provided on an opening side of a case of the hydraulic adjuster to prevent the pressure bearing arm from entering the interior of said case;
• and a swivel stop means adapted to engage said engaging piece in a rotational position beyond a preset operational range of the eccentric cam to stop the cam is provided at a side part of said case.