TM10-3930-660-20 8-20. FORK AUTOLEVELER CIRCUIT BOARD  - TEST/REPLACE This task covers: a. Testing of Fork Autoleveler Switch and Circuit Board b. Removal c.  Installation Initial Setup Tools Materials/Parts Tool Kit, Automotive Mechanics Locknuts  (16) Lockwashers  (12) Template Level Protractor,  Circular Equipment  Condition Vehicle parked on level ground. TESTING OF FORK AUTOLEVELER SWITCH AND CIRCUIT BOARD NOTE The autoleveler circuit board (1) is located at the top of the MLRS attachment, inside the boom electrical box (2). potentiometers labeled “Hi A“, “Hi B“, "LO" and "RMP" on autoleveler circuit board (1) are preset at the factory. Do not attempt to adjust them. 1. START ENGINE. RAISE FORKS APPROXIMATELY ONE FOOT OFF STOP  ENGINE. GROUND . 8-45