Luffing Hoist Operation - Manitowoc 18000 Operator's Manual

18000 OPERATOR MANUAL
CAUTION
Rigging Damage!
When lowering boom to ground:
• If equipped, disconnect fixed jib stop before jib point
contacts ground.
• If equipped, remove upper boom point before upper
point contacts ground.

Luffing Hoist Operation

See Figure 3-10 for drum identification.
See Figure 3-18 for the following description of operation.
See Figure 3-19 for identification of boom and luffing angles.
WARNING
Death or Serious Injury!
Read and understand instructions in Luffing Jib Rigging
Guide before attempting to raise or lower luffing jib from or
to ground.
CAUTION
Rigging Damage!
Check that luffing hoist wire rope is reeved through all
sheaves and spooled properly onto Drum 6 before raising
boom and jib from ground.
See Luffing Jib Rigging drawing for wire rope and reeving
specifications. See Wire Rope Installation in this section
for instructions on attaching wire rope to drum 6.
1. Select and confirm Luffing mode.
NOTE: When Luffing Jib mode is selected, the boom hoist
drum is controlled by Handle D. See handle display
light to determine what drum is controlled by what
handle.
2. Turn off Drum 6 park.
CAUTION
Boom or Luffing Jib Damage!
Do not turn on drum 6 park while raising or lowering luffing
jib. Brake will bring luffing jib to an abrupt stop. This action
could cause shock load damage to boom and jib. Bring
luffing jib to smooth stop with handle A and then turn on
drum 6 park.
Manitowoc
3. Increase engine speed to desired RPM with hand
throttle. Depress foot throttle to momentarily increase
engine speed when more power is required.
4. Push handle A (Drum 6) FORWARD from off to LOWER
luffing jib or pull handle BACK from off to RAISE luffing
jib.
Pay out load lines while lowering luffing jib. Load may
contact luffing jib point sheaves if this step is not taken.
Wire rope or other parts could break allowing load to fall.
5. As luffing jib nears desired angle, slowly move handle A
toward off to decrease speed. Then move handle A to off
to stop luffing jib and hold it in position (park brake will
apply).
6. Turn on Drum 6 park if luffing jib angle will not be
changed.
When lowering boom and luffing jib to ground, disengage
luffing jib stop at specified boom to luffing jib angle (see
Luffing Jib Rigging Guide).
3-118
Published 12-05-17, Control # 032-23
OPERATING CONTROLS AND PROCEDURES
WARNING
Two-Blocking Hazard!
CAUTION
Luffing Jib Damage!
4
1
3
Item Description
1 Horizontal
2 Boom Angle
3 Boom to Luffing Jib Angle
4 Luffing Jib Angle
2
1
3
A1258
FIGURE 3-19
3-39