National Crane Published 10-30-2014 Control # 040-09 2-27
1400H OPERATOR AND SERVICE MANUAL OPERATING CONTROLS
Use Caution during this step. The jib is free to
swing away from the boom upon boom
extension.
13. Using tag line, swing jib into deployed position.
14. Remove cable keeper pins from boom sheave case and
jib. Remove hook block. Pivot jib slightly to allow for
loadline to be removed from boom sheave case.
Remove loadline from boom sheave case and place in
an area to minimize possible damage.
15. Pivot jib into place, visually aligning the upper C2 pin
holes. Install upper C2 pin and spring clip. A slight
hammer strike may be necessary to install pins. Always
use proper eye protection during this step.
16. Using jib jack, position jib so that lower C2 pin holes are
in alignment and install lower C2 pin and spring clip.
17. Using hoist function, unspool enough loadline to reeve
loadline over jib sheave case. Keep slight tension on
loadline to avoid bird caging of loadline on hoist drum.
18. Route loadline over jib sheave and install keeper. Install
line block to end of loadline.
19. Remove anti-two-block switch and weight/chain
assembly and install on jib tip. Be certain to use keeper
provided with switch.
20. Disconnect twist lock quick coupler on anti-two-block
cord going to boom anti-two-block switch and attach to
quick coupler on jib anti-two-block wire on rear of jib
between the upper and lower jib ears.
21. Install jib swing pin B and spring clip into jib ears.
22. For manually extendable jibs, pull extension retention
pin E, and extend second section out by pulling on
sheave case. The second section jib, as it extends, will
hit a mechanical stop that allows for extension pin E
installation. Install pin E and spring clip.
23. Make ATB cord connections as required.
DANGER
A FREE FALLING JIB WILL RESULT IN
DEATH OR SERIOUS INJURY
Before operating the crane check that jib is properly
secured. You must follow proper jib erection and
stowing procedures. See crane manufacturer' s
manual.
Side stow
bracket
on jib
877994G7
Before removing pins (C) when stowing jib, boom
must be level and fully retracted, and stow pin (A)
must be properly located in the side stow bracket
through hole (D).
Do not extend boom after removing jib swing pin
(B) until boom is in level position.
When stowing or erecting jib, boom must be in
level position.
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