TM 10-3930-659-20 10-2. PARKING BRAKE ADJUSTMENT (Con't). 5. Tighten nut (1) against clevis (2). 6. Install new cotter pin (3). NOTE Parking brake must hold forklift truck on an Incline. 7. Park forklift truck on an incline and set parking brake (see TM 10-3930-659-10).  If parking brake does not hold forklift truck, repeat steps 1 through 6 until parking brake holds forklift truck on an Incline. WARNING Forklift  truck  will  move  forward  If  parking  brake  Is  not  properly adjusted.    All  personnel  should  stay  clear  of  forklift  truck  when checking for proper adjustment. 8. Park forklift truck on a level surface, start engine, depress parking brake pedal (7), and shift transmission into forward fourth gear (see TM 10-3930-659-10). 9. Operate engine at fast engine idle speed (see TM 10-3930-659-10).  Forklift truck must not move. NOTE Perform steps 10 through 14 only if proper adjustment was not obtained. 10. Loosen nut (8) and remove cotter pin (10), clevis pin (6), and clevis (9) from parking brake pedal (7).  Discard cotter pin. TA706931 10-7