8799-B, 2011-09-23
Manitowoc Cranes, Inc.
2/4
Manitowoc, Wisconsin 54220 U.S.A.
14000 SERIES 2
Luffing Jib Raising Procedure
Fixed Jib No. 138 on Luffing Jib No.135 on Boom No. 76
B. Layout Jack-Knife Method With Fixed Jib Attached Before Luffing Jib Lift-Off:
Raising:
Boom and luffing jib are assembled in layout, end-to-end, position. Attach fixed jib backstay pendants to luffing
jib insert and place on ground. Slowly raise boom until luffing jib stop strut is just clear of ground. Attach luffing
jib stop pendants and unpin luffing jib stop inner strut from retracted position. Slowly raise boom until luffing jib
stop strut is fully extended and pins engaged (approximately 168 degree boom-to-luffing jib angle). Boom is
then raised while luffing jib point wheels are allowed to roll on ground. Tension should be applied to luffing jib
hoist to keep luffing jib strut off luffing jib during boom raising. Boom up until boom-to-luffing jib angle reaches
value specified in the tables. Tighten luffing jib suspension with luffing jib hoist. Attach fully assembled fixed jib
to luffing jib. Attach fixed jib backstays to fixed jib strut. Attach fixed jib stop to fixed jib butt and temporarily tie
off to fixed jib strut. Boom and luffing jib are then raised together using boom hoist while fixed jib point wheel
rolls on ground. Continue raising until fixed jib suspension tightens. Attach fixed jib stop to luffing jib top. Boom,
luffing jib and fixed jib are then raised together using boom hoist until boom reaches desired boom operating
angle. Fixed jib radius must be within capacity chart before swinging over side of machine when raising over
end of blocked crawlers.
Lowering:
Position boom at 85 degrees prior to lowering luffing jib. Lower luffing jib until boom-to-luffing jib angle reaches
value specified in the tables. Lower boom until fixed jib point wheels contact ground. Remove fixed jib stop from
luffing jib top and temporarily tie off to fixed jib strut. Lower boom as fixed jib point wheels roll on ground. Lower
boom until luffing jib point wheels contact ground. Remove fixed jib from luffing jib. Continue to lower boom
while luffing jib point wheels roll along ground. Keep enough tension on luffing jib hoist to keep luffing jib strut
off luffing jib. Stop lowering boom when luffing jib stop pendants start to go into tension (approximately 168
degree boom-to-luffing jib angle). Disengage luffing jib stop strut pins and lower boom to retract luffing jib stop
inner strut. Pin strut in retracted position.
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