Manitowoc 999 User Manual

Reference Only
Manitowoc Published 05-15-17, Control # 043-09 4-13
999 LUFFING JIB OPERATOR MANUAL SETUP AND INSTALLATION
4
Raise Main Strut/Connect Backstay Pendants
See Figure 4-7 for the following procedure.
1. Unpin main strut spreader bar (1, View B) from brackets
(3) on main strut.
Store pins (2) in pockets in side of brackets (3).
2. Unpin main strut pendants (4, View C) from storage lugs
(6).
Store pins (5) in bottom holes in storage lugs (6).
3. Unpin strut handling pendant and link (7, View C) from
storage lugs (9) on left side main strut pendant (4).
Store pins (8) in rear holes in storage lugs (9).
4. Route load line from front drum over left upper sheave in
boom butt wire rope guide (Figure 4-6
, View C).
5. Lay load line down center of boom and along left side of
boom top wire rope guide.
Do not route load line through any guide sheave in
boom top wire rope guide.
6. Connect wedge socket (10, View A) to load line from
front drum (this is same wedge socket used to anchor
load line to jib point).
7. Pin wedge socket (10, View A) to strut handling pendant
and link (7).
8. Slowly haul in load line just enough to support main
strut.
Make sure load line does not catch on any other
components as it tightens.
9. Unpin strut supports (12, View D) from jib strut and pin
supports to main strut for storage.
10. Slowly haul in load line while paying out luffing hoist wire
rope to raise main strut.
11. Tighten luffing hoist wire rope as main strut nears
vertical so strut moves smoothly past vertical.
12. Stop raising main strut when it starts to go past vertical
and remove pins (14, View F) connecting lower stop
tubes (15) to main strut.
13. Continue to haul in load line and pay out luffing hoist wire
rope to lower main strut to rear (Figure 4-7
, View H).
Keep load line slacker than luffing hoist wire rope so
jib strut is not over tensioned.
14. Stop lowering main strut when holes in lower stop tubes
(15, View G) line up with holes in lugs on boom top.
15. Pin lower stop tubes (15, View G) to lugs on boom top.
WARNING
Moving Part Hazard!
Do not stand on boom top or jib butt while main strut is
being raised or lowered.
Wait until main strut is stopped and supported by load line
or luffing hoist wire rope before climbing onto boom top or
jib butt when connecting and disconnecting strut stop
tubes.
CAUTION
Jib Strut Damage!
Do not allow luffing hoist wire rope to go into tension until
main strut is near vertical. Jib strut could be damaged.

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English