Manitowoc 18000 Service Maintenance Manual

Reference Only
Manitowoc Published 12-05-17, Control # 035-23 4-5
18000 SERVICE/MAINTENANCE MANUAL BOOM
4
Adjustment
NOTE: All reference to LED is past production only.
1. Park the crane on a firm level surface or level the crane
by blocking under the crawlers.
2. Make sure the proper adjusting rod is installed (see
Table 4-2
):
• Rod (2a) for BOOM ONLY
• Rod (2b) for boom WITH LUFFING JIB
3. Raise the boom to specified Angle A (Figure 4-1
) while
monitoring the angle on the mechanical indicator or on
the operating conditions screen of the front-console
display.
4. Verify that the boom is at the proper Angle A:
a. Place an accurate digital level (12) on the boom butt
as shown in Figure
4-3. The corresponding Digital
Level Angle should a
ppear on the digital level.
b. Raise or lower
the boom as necessary.
5. If the boom stops at the specified angle, further
adjustment is not needed.
• If the boom stops before reaching the specified
angle, go to step 6
.
• If the boom reaches the specified angle before it
stops, go to step 7
.
See Figure 4-2
for the remaining steps.
6. If the boom stops before reaching the specified angle:
a. Loosen jam nut (3, View B).
b. Turn adjusting rod (2a or 2b) all the way into
coupling (4).
c. Boom up slowly until the boom the reaches
specified angle.
d. Turn adjusting rod (2a or 2b) out against boom butt
(1) until limit switch (5) “clicks” open and the LED is
OFF (View A).
e. Tighten jam nut (3).
7. If the boom reaches the specified angle before it stops:
a. Loosen jam nut (3, View B).
b. Turn adjusting rod (2a or 2b) out against boom butt
(1) until limit switch (5) “clicks” open and the LED is
OFF (View A).
c. Tighten jam nut (3).
8. Check that actuator rod (11) over-travels the limit switch
as shown in View A.
9. Test the adjustment as follows:
a. Lower the boom several degrees below the
specified Angle A.
b. Slowly raise the boom.
c. Boom must stop at specified Angle A. If the
boom does not stop at the specified angle:
- Stop raising the boom (move control handle to
off).
- Lower the boom several degrees below the
specified angle.
d. Repeat adjustment steps 2 through 9.
Actuator Rod Replacement
See Figure 4-2, View B for the following procedure.
1. Remove damaged actuator rod (11).
2. Slide spring washers (7 and 9) and spring (8) over new
actuator rod (11) while sliding the actuator rod into the
bracket assembly.
3. Position actuator rod (11) so the tapered end just
touches limit switch (5) roller (View B). The actuator rod
must not depress the limit switch roller.
4. Drill a 1/4 in (6,35 mm) hole through spring washer (9)
and actuator rod (11).
5. Install dowel pin (10).
6. Install proper adjusting rod (2a or 2b).
FIGURE 4-3
Boom Stop
Angle
Digital Level
Angle
83° 70.7°
84° 71.7°
85° 72.7°
86° 73.7°
87° 74.7°
88° 75.7°
12
Against Bottom Chord
of Boom Butt on Right
Side of Crane

Manitowoc 18000 Specifications

General

Brand	Manitowoc
Model	18000
Category	Construction Equipment
Language	English