NATIONAL CRANE Published 03-23-2018 Control # 243-14 4-5
NBT50 OPERATOR MANUAL SET-UP
13. Use the alignment jack (10, Figure 4-3) to align lower left
side attachment pin (7, Figure 4-3).
a. Remove the jack handle (8, Figure 4-4) from the
boom stowage bracket and check that the jack
release valve is closed.
b. Extend the alignment jack (10, Figure 4-3) so that
the lower left pin holes (7, Figure 4-3) are aligned.
c. Install the lower left side attachment pin (7,
Figure 4-3) and spring clip.
d. Open the jack release valve and retract the jack (10,
Figure 4-3).
14. Using hoist function, un-spool enough loadline to reeve
loadline over jib sheave case. Keep slight tension on
loadline to avoid bird caging of loadline on hoist drum.
NOTE: The hoist cable must be routed over the mast
assembly and under the roller on the mast for all
configurations.
15. Route loadline over jib sheave and install keeper. Install
line block to end of loadline.
16. Remove A2B switch and weight/chain assembly and
install on jib tip, see Figure 4-6. Be certain to use keeper
provided with switch.
17. Disconnect A2B cord going to boom A2B switch and
attach to quick coupler on jib A2B wire on rear of jib
between the upper and lower jib lugs.
18. Install jib swing pin (5, Figure 4-3) and spring clip into jib
lugs.
19. For manually extendable jib, pull jib retaining pin (9,
Figure 4-3), 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 jib retaining pin (9,
Figure 4-3) installation. Install pin (9) and spring clip.
20. Make ATB cord connections as required.
To Next Page
Loading...
Need help?
General
