Manitowoc 18000 Service Maintenance Manual

Reference Only
BOOM 18000 SERVICE/MAINTENANCE MANUAL
4-2
Published 12-05-17, Control # 035-23
Bypass Limit 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 adjusting rod (2a or 2b
Figure 4-2
) in to trip the boom stop limit switch open.
3. Rotate the limit bypass key (in crane cab) to the bypass
position and hold.
4. Try to boom up — 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 adjusting rod to the normal operating positions.
Table 4-1 — Automatic Boom Stop Angles
Angle A
(see Figure 4-1
)
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) 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) of Boom
*
To determine if the boom up limit on you crane can be bypassed or not, perform Bypass Limit Test given below.
1
: Past production with 4-3/4 in (121 mm) long adjusting rod.
2
: Current production with 4-1/2 in (114 mm) long adjusting rod.
WARNING
Crush Hazard!
Maintain constant communication between operator and
assistant during the following steps.
Stay clear of moving parts.

Manitowoc 18000 Specifications

General

Brand	Manitowoc
Model	18000
Category	Construction Equipment
Language	English