TM 10-3930-669-10 3-9. HYDRAULIC OIL LEVEL CHECK AND SERVICE. Hydraulic Oil Level Check and Service. (1) Shut down forklift (Para 2-10.  h.). (2) Open right-hand engine access cover (1). WARNING Use   caution   when   removing   cap   on hydraulic  tank,  cap  pressure  is  5  to  6 pounds. (3) Remove  cap  (2).    Oil  must  be  in  contact with bottom of strainer. (4) Add hydraulic oil according to Lubrication Order (LO 10-3930-669-12) as necessary. (6) Install cap (2) securely. (7) Close right-side engine access cover (1). 3-10.  PARKING BRAKE ADJUSTMENT AND CHECK. a. Parking Brake Adjustment. WARNING If    the    parking    brake    does    not    set correctly,    the    forklift    can    roll    into personnel and/or equipment and cause    serious    injury    and    damage. When the brake lever is pulled up and back, it should feel tight. (1) Open cab door (1). (2) Push parking brake lever (2) forward and down to release brake. 3-17