Manual 814-1 OPERATION No DV. 390-0 : Checking hydraulic components on the vehicle Op. DV. 390-0 5 d) To check the height corrector block the pension cylinder feed pipes by means of plugs. The leakage observed is that of the height cor- rector, and should not bring about a drop in pressure of more than 10 bars (150 psi) in three minutes. 3266 14. Checking the rear suspension, a) Block by means of plugs - opening (2) feeding front suspension