CAUTION 2-14. AIR    CLEANER    SERVICE    INDICATOR. Located     on     top     of     the     reservoir     to     the left    of    the    reservoir    fill    cap.    It determines     when     the     air     filter     is     to     be TM   10-39-30-64-10 serviced. Electrical     system     will     be     damaged     if     master     disconnect switch    is    left    OFF    with    engine    running. The batteries will    discharge    if    master    disconnect    switch    is    left    ON with    engine    not    running. 2-15. E L E C T R I C A L  S Y S T E M  M A S T ER DISCONNECT     SWITCH. Located    on    the    left side    of    the    hydraulic    reservoir    next    to the     battery     box.     When     turned     to     OFF     will d e a c t i v a t e  t h e  f o r k l i f t ’ s  e n t i re electric system. If     left     ON     when     the forklift    is    not    running,    the    batteries will    discharge.    If    left    OFF    with    engine running,     the     electrical     system     will     be damaged. 2-16. COOLANT     LEVEL     SIGHT     GAGE. Located     at     the     top     rear     of     the     radiator, coolant    is    viewed    through    the    gage.    The coolant    level    must    be    visable    in    the gage. 2-13 2-17. ENGINE     OIL     DIPSTICK. Located     on     the     right     side     of     the     engine.