Manitowoc 2250 Service And Maintenance Manual

Reference Only
BOOM 2250 SERVICE/MAINTENANCE MANUAL
4-2
Published 11-06-15, Control # 040-13
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 boom up limit switch plunger in
to trip the limit switch open.
3. Rotate limit bypass key 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.
The test is complete: release the limit bypass key and the
boom stop rod to the normal operating positions.
FIGURE 4-1
Item Description
1Boom Butt
2a Limit Switch (Maximum Angle)
2b Limit Switch (Minimum Angle)
3a Actuator
VIEW A
Crawler or Truck Crane
Horizontal
2a
3a
1
Centerline
of Boom
2b
A
see Table
Automatic Boom Stop Maximum Angles
Maximum
Angle A
Attachment
M250 and 2250
(Crawler and Truck), View A
83° #44 HL Boom and #44 LR Boom.
88°
#44 HL Boom with #133 or 133A Luffing Jib
when the boom up limit can be bypassed
1
.
89°
#44 HL Boom with #133 or 133A Luffing Jib
when the boom up limit cannot be bypassed
1
.
1
The boom up limit cannot be bypassed on current production
cranes. To determine if the boom up limit can be bypassed on
your crane, perform the Limit Bypass Test below.
WARNING
Crush Hazard!
Maintain constant communication between operator and
assistant during the following steps.
Stay clear of moving parts.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English