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National Crane
Published 5-27-2018 Control # 039-06
2-29
800D
OPERATION
10. Using tag line, swing jib into deployed position.
11. 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.
12. Pivot jib into place, visually aligning the upper C2 pin
holes. Install upper C2 pin and keeper. A slight hammer
strike may be necessary to install pins. Always use
proper eye protection during this step.
13. Using jib jack, position jib so that lower C2 pin holes are
in alignment and install lower C2 pin and keeper.
14. 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.
15. Route loadline over jib sheave and install keeper. Install
line block to end of loadline.
16. Remove anti-two-block weight/chain assembly from
boom tip switch and install on jib tip switch.
17. 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.
18. Install pin B and keeper into jib ears.
19. Unwrap ATB cord on side of jib to allow manually
extending jibs to be deployed without damage to the
cord.
20. 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 and keeper.
21. Make ATB cord connections as required.
Stowing Procedure
1. Using lift function, lower boom so that jib tip is close to
the ground.
2. For manually extendable jibs, pull extension retention
pin and fully retract extendable 2nd section jib into the
1st section. Retraction of 2nd section may be facilitated
by attaching loadline wedge socket to attachment point
F on the jib sheave case. Slowly activate the hoist up
function until the 2nd section is fully retracted
3. Reinstall extension retention pin through the 1st and 2nd
section jib assembly and install spring clip.
4. Remove loadline from jib sheave case. Place loadline in
area to avoid possible damage from stow procedure.
5. Disconnect twist lock anti-two-block wire connector at
rear of 1st section jib. Connect twist lock connector to
anti-two-block switch connector on boom tip. Move anti-
two-block weight assembly to boom tip switch.
6. Attach tag line to sheave case end of jib.
7. Remove spring clips from pins C2 on both upper and
lower jib ears.
8. Remove pins C2 from upper and lower jib ears. Do not
remove C1 pins at this time. C1 pins will be used as a
pivot point to swing jib into stow position. A slight
hammer strike may be necessary to remove pins.
Always use proper eye protection during this step.
Utilization of the jib jack at this time will aid in pin hole
alignment to facilitate pin removal.
9. Using lift function, raise boom to a horizontal position.
10. Using extend function, extend boom approximately 1
foot.
11. Using tag line attached to jib sheave case, slowly swing
jib into stow position (parallel with 1 st section boom).
Pins C1 are the jib pivot points during this operation.
U s e c a u t i o n w h e n s w i n g i n g j i b t o a v o i d
unnecessary impact with 1st section boom.
12. Install t-handle pin B through jib ear and boom sheave
case holes. This pin will keep the jib assembly in line
(parallel) with the 1st section boom. Pin B
does not
retain the jib in its stowed position on the 1st section
boom.
13. Using boom telescope function, slowly retract boom.
The ramp/bracket assembly on the side of the 1 st
section jib will engage the hook on the side of the 1st
section boom, first lifting the jib and then engaging the jib
stow bracket and the boom hook completely upon full
retraction of the boom.
14. Install stow pin A with spring clip into the ramp/ bracket
assembly on the jib. Complete engagement of stow
brackets and proper installation of pin A is critical for
secure jib stow attachment.
15. Remove pins C1 from upper and lower jib ears. A slight
hammer strike may be necessary to remove pins.
Always use proper eye protection during this step.
16. Reinstall loadline over boom sheave case.
Fo
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Reference
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Summary of Contents for National Crane 800D
Page 1: ...Operator and Service Manual National Crane 800D F o r R e f e r e n c e O n l y ...
Page 4: ...F o r R e f e r e n c e O n l y ...
Page 252: ...SCHEMATICS 800D 2 Published 5 27 2018 Control 039 06 F o r R e f e r e n c e O n l y ...
Page 255: ...F o r R e f e r e n c e O n l y ...
Page 256: ...F o r R e f e r e n c e O n l y ...