TM 10-3930-643-10 2-20. OPERATING     PROCEDURES.-Continued d. After    Starting. (1)    Perform    during    (D)    PMCS.    Refer to    paragraph    2-18. (2)     Operate     the     engine     at     low     idle until    the    hydraulic    oil    is    warm. W h en the    temperature    is    below    35    degrees, move    all    hydraulic    controls    slowly    to warm    them    up. Move    each    cylinder several    times    to    warm    it. (3)    Test    the    hydraulic    controls. Allow    extra    warm-up    time    if    controls    are sluggish. T A 3 2 7 9 37 d. Moving    the    Forklift. Be    sure    your    seat    belt    is    fastened.    Before    moving the    forklift    or    operating    the    boom    or    forks,    be    sure    all    personnel    are    clear    of the    area. Transmission    directional    lever    lock    must    be    moved    to    the    unlock position    in    order    to    shift    the    transmission    directional    lever. 2-35