TM 10-3930-643-10 2-23. OPERATION    IN    UNUSUAL    WEATHER.-Continued a.    Extreme        Cold.-Continued (d)    Observe    the    water    temperature    gage    and    warning    light    during    the warm-up    period    to    make    sure    that    the    radiator    has    not    frozen    overnight.    If radiator    is    frozen,    report    to    organizational    maintenance. (e)     Cover     radiator,     if     necessary, to    bring    engine    up    to    operating temperature. (7) Forklift operation. (a)    Test    brakes    and    forklift    controls    carefully. (b)    Move    all    controls    slowly    to    warm    the    hydraulic    oil.    Cycle    each control    several    times.    Normal    warm-up    period    is    three    to    ten    minutes. (c)     Operate     under     a     light     load     for     the     first     five     minutes     of     operation. (8)    At    halt    or    parking. (a)     Park     forklift     in     a     sheltered     place,     if     possible.     Cover     to     protect engine,    accessories,    and    controls    from    ice    and    snow.    An    open    ROPS    forklift    must be    covered. (b)    Run    forklift    onto    planks    to    prevent    tires    from    freezing    to    the ground.    Block    up    forks. (c) it    freezes. (d) remove    the Be    sure    you    clean    wet    snow    or    mud    from    tires    and    cylinders    before In     extremely     cold     weather, notify organizational maintenance to batteries    and    store    them    in    a    moderately    warm    area.    Have    the batteries     reinstalled     just     before     you     start     the     engine. b. Extreme Heat. (1)     General. Check    temperature    gage    and    light    frequently    for    indication of     overheating. Allow    engine    to    idle    slowly    when    it    is    overheated,    until temperature     is     reduced     as normal. (2)     Cooling     system. (a)    Check    coolant tight.    Report    low    coolant indicated    by    light    going    out    or    gage    indicating level    at    frequent    intervals    and    keep    radiator    cap level to organizational maintenance. (b)    Be    sure    the    radiator    is    free    of    bugs,    dust,    and    other    foreign matter. (c)    Check    fan    belt    tension    frequently. Report    any    damaged    or    loose belts to organizational (3) Lubrication. provided with lubricant 2-54 maintenance. Lubricate    according    to    LO    10-3930-643-12.    You    will    be suitable     for     extreme     heat.