Tensioner device processing method: correct the direction of rotation of the pump, to solve the oil pump failure.2.4 residual pressure excessive residual pressure in the General Assembly lost braking effect, the main reason is: electro-hydraulic regulator electric tensioner device rod on the plate from the nozzle distance is small; overflow valve throttle hole is too large. Treatment: adjust or replace the upper plate of the tensioner rod; replace the overflow valve throttle hole with a small diameter throttle hole, 2.5 secondary brake oil pressure value pressure-holding performance failure caused by the secondary brake oil pressure value pressure-holding failure is as follows: oil circuit block large overflow valve inside the dirt, can not close the spool; one side of the throttle break valve opening is too large, a large amount of oil leakage; electromagnetic conversion valve internal dirt, internal leakage is large. For this failure, first remove the spool for cleaning, remove the dirt, the spool is placed in the specified position, adjust the throttle break valve in one direction, adjust the opening as small as possible to play the role of throttle and oil supplement