CAUTION:    THE  "A"  DIMENSIONS  SHOWN  IN  THE TABLE   ARE   THE   MINIMUM   ALLOWED   FOR   SAFE OPERATION AND SHOULD NOT BE REDUCED. Figure 14. ENCLOSED TYPE LIMIT SWITCHES, Models A thru H and A-2 thru H-2. 1.  Limit switch sub-assy.   4.  Guide plate 2.  Limit switch shaft 5.  Screws and lock washers 3.  Traveling nuts Figure 15. ENCLOSED TYPE LIMIT SWITCHES, Models J thru RR and J-2 thru RR-2. 1.  Limit switch sub-assy.   4.  Guide plate 2.  Limit switch shaft 5.  Screws and lock washers 3.  Traveling nuts SETTING UPPER LIMIT SWITCH 5. Refer  to  Table  I  The  "A"  dimensions  given  are the   minimum   distances   that   should   be   set between top of hook block and bottom of hoist. In   other   words,   the   highest   allowable   hook position. 6. Reconnect hoist to power supply. 7. Run    hook    to    the    desired    upper    position, cautiously operating the hoist without a load. 8. Disconnect hoist from power supply. 9. Moving   one   traveling   nut   toward   the   other increases  hook  travel  and  away  from  the  other decreases the travel.  Now, turn the nut nearest the   switch   indicated   as   the   "UPPER   LIMIT SWITCH"   until   it   just   breaks   the   limit   switch contacts.  An audible click will be heard as the switch opens.  Continue to rotate the nut toward the switch an additional two full teeth on single limit  switch  gear  reduction  or  one  full  tooth  on double limit switch gear reduction, refer to Table I. 10. Reposition  the  guide  plate  in  the  next  slot  and securely tighten screws. 11. Reconnect hoist to power supply and check the stopping point of hook by first lowering the hook about 10 inches, then raise the hook by jogging cautiously   until   the   upper   limit   switch   stops upward   motion.      The   stopping   point   of   hook should  be  the  desired  upper  position.    If  not, repeat the above instructions. 12. Double check setting by lowering the hook about 2 feet and then run the hook into the upper limit with i (UP) control held depressed. 13. Fine  adjustment  of  the  upper  limit  setting  may be obtained by inverting the guide plate in Step 10.    The  offset  on  the  plate  gives  adjustments equivalent   to   1/2   notch,   see   Table   I   for   the "Hook  Travel  Per  Notch  of  Limit  Switch  Nut". When inverting the plate, it may be necessary to use  the  notch  adjacent  to  the  one  used  in  the preliminary setting. SETTING LOWER LIMIT SWITCH 5. Refer  to  Table  I  The  "B"  dimensions  given  are the  minimum  number  of  load  chain  links  that should  be  set  between  the  loose  end  link  and the  hoist  frame  on  the  loose  end  side  of  the chain.  In other words, the lowest allowable hook position. CAUTION:  THE "B" DIMENSIONS SHOWN IN THE  TABLE  ARE  THE  MINIMUM  ALLOWED FOR  SAFE  OPERATION  AND  SHOULD  NOT BE REDUCED. 6. Reconnect hoist to power supply. 7. Run   the   hook   to   the   desired   lower   position, cautiously operating the hoist without a load. 8. Disconnect hoist from power supply. 17