TM 10-3930-643-10 1-10. DIFFERENCE BETWEEN MODELS.-Continued S/N    2001    AND    ABOVE S/N    2000    AND    BELOW M    Ignition    switches    are    located    on the    RH    side    of    the    instrument panel    in    the    operator’s    compart- ment. S/N    2001    and    above    does not     require     a     key. The    cab    door may    be    locked    for    security. S /N 2000     and     below     requires     a     key     to operate. N     S/N     2000     and     below     has     a     rain cap    on    the    end    of    the    exhaust p i pe t o  p r o v i d e  p r o t e c t i on against     moisture.     S/N     2001     and above     utilize     a     curved     exhaust pipe. O     Master     disconnect     switches     are located    on    the    LH    side    of    the hydraulic    reservoir. S/N    2001 and    above    need    no    key    to    oper- ate. S/N    2000    and    below    is    key operated     for     protection     against theft    and    vandalism    when    the forklift    is    left    unattended. T A 3 2 7 8 98 1 - 12