Manitowoc 18000 User Manual

Reference Only
OPERATING CONTROLS AND PROCEDURES 18000 OPERATOR MANUAL
3-32
Published 12-05-17, Control # 032-23
Max Up 1 (boom)
Automatically stops the boom when it is raised to the preset
maximum angle shown in the following table:
The boom can be lowered after the limit is contacted.
LIMIT BYPASS TEST: Perform the following test to
determine if the boom up limit on your crane can be
bypassed or not:
1. Lower the boom onto blocking at ground level.
2. Have an assistant push the boom stop rod in to trip the
boom up limit switch open (see Section 4 of Service
Manual supplied with crane).
3. Rotate limit bypass key (D5) to the bypass position and
hold.
4. Try to boom up SLOWLY — do not raise the boom any
higher than necessary to perform the test:
a. If the boom rises, your boom up limit can be
bypassed.
b. If the boom does not rise, your boom up limit cannot
be bypassed.
5. The test is complete: release the limit bypass key and
the boom stop rod to the normal operating positions.
Block Up
Automatically stops the boom or luffing jib hoist from
lowering and the load drums from hoisting if the load
contacts a block-up limit switch.
The load on the corresponding drum can be lowered and the
boom or luffing jib hoist can be raised after a block-up limit
switch is contacted.
The appropriate limit bypass switch must be turned to the
bypass position before a load can be hoisted above the limit.
Luffing Jib UP Limits
Two luffing jib up limits are provided:
•MAX UP 1 (maximum working angle): automatically
stops the luffing hoist when the boom to luffing jib angle
is 168°. This is a programmed limit controlled by angle
sensors on the boom and jib.
The limit bypass switch must be turned to the bypass
position to allow the jib to be raised to MAX UP 2 limit.
•MAX UP 2 (maximum angle): automatically stops the
luffing hoist when the boom to luffing jib angle is 169 to
170.5°. This limit is controlled by a limit switch.
This limit can be bypassed with the limit bypass switch
only when the attachment is lowered to ground (boom
below 50°).
The luffing jib can be lowered after either limit is contacted.
Max.
Boom
Angle
Attachment
83°
1
#55-79A, #55, or 55A Boom without Luffing Jib
OR
84°
2
#55-79A, #55, or 55A Boom without Luffing Jib
When boom up limit can be bypassed. *
85°
#44 or #79A Luffing Jib on
140-180 ft (42,7-54,9 m) of Boom
87°
#44 or #79A Luffing Jib on
200-340 ft (61,0 –103,6 m) of Boom
When boom up limit cannot be bypassed. *
86°
#44 or #79A Luffing Jib on
140-180 ft (42,7-54,9 m) of Boom
88°
#44 or #79A Luffing Jib on
200-340 ft (61,0 -103,6 m) of Boom
* To determine if the boom up limit on your crane can be
bypassed or not, perform Bypass Limit Test given below.
1
: Past cranes with 4-3/4 in (121 mm) long adjusting rod.
2
: Current cranes with 4-1/2 in (114 mm) long adjusting rod.
WARNING
Falling Boom/Jib Hazard!
If you bypass boom up limit for any reason, DO NOT allow
physical boom stops to bottom out. Boom butt could be
damaged, causing boom and jib to fall over backwards.
Crush Hazard!
Maintain constant communication between operator and
assistant during following steps.
Stay clear of moving parts.
WARNING
Two-Blocking Hazard!
If it is necessary to hoist a load above block-up limit, do so
slowly with extreme caution to prevent two-blocking.
Do not hoist load above minimum block clearance given
in Range Diagram (see Capacity Chart Manual).
Do not use limit bypass switch to lower boom or luffing jib
hoist after block-up limit is contacted; two-blocking could
occur, causing load to fall.

Manitowoc 18000 Specifications

General

Brand	Manitowoc
Model	18000
Category	Construction Equipment
Language	English