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Reference
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HOISTS
MLC650 SERVICE/MAINTENANCE MANUAL
5-70
Published 09-09-16, Control # 229-09
EUBP Limit 2 Block-Up Limit Switch
Adjustment
for the following procedure.
Lower the boom onto blocking at the ground level and adjust
each limit switch as follows:
1.
Remove the block-up limit assembly cover (6) to access
the internal components.
2.
Adjust the spring (1) tension so there is enough force to
lift the weight of the chain and rotate the actuating lever
(5) when the weight is lifted.
3.
Manually lift the weight to allow the actuating lever to
rotate upward.
4.
Hold the actuating lever at Dimension A from the spring
return position.
5.
Loosen the setscrew (2) on the limit switch actuator
arm (4).
6.
Using a screwdriver, hold the roller on the limit switch
actuator arm against the actuating lever while
performing
.
7.
Turn the limit switch shaft (3) counterclockwise until the
switch just actuates, then tighten the setscrew on the
limit switch actuator arm.
8.
Test the limit switch for proper operation (see
9.
Repeat the adjustment steps until the limit switch
operates properly.
10.
Install the block-up limit assembly cover when testing is
complete.
Replacement
1.
Remove the block-up limit assembly cover (6).
2.
Remove four mounting screws on the limit switch (7).
3.
Remove the limit switch cover to expose the internal
wiring connections.
4.
Disconnect the electrical wires inside the limit switch.
5.
Remove the cable restraint nut and carefully pull the
electrical cable and wires from the limit switch.
6.
Loosen the setscrew (2) and remove the limit switch
actuator arm (4).
7.
Insert the electrical cable into the new limit switch and
connect the wiring.
The jumper wires and the receptacle lead wires must be
stripped to 6,35 mm (0.25 in) to properly fit the U-clamp
screw termination.
8.
Install and tighten the cable restraint nut to the limit
switch.
9.
Install the limit switch cover.
10.
Install limit switch actuator arm.
11.
Install the limit switch onto the block-up limit assembly
using four mounting screws.
12.
Perform the EUBP limit 2 block-up limit switch
adjustment procedure.
13.
Install the block-up limit assembly cover.
Item
Description
1
Spring
2
Setscrew
3
Limit Switch Shaft
4
Limit Switch Actuator Arm
5
Actuating Lever
6
Block-Up Limit Assembly Cover
7
Limit Switch
FIGURE 5-38
Dim. A = 26,4 mm
Summary of Contents for MLC650
Page 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc MLC650 ...
Page 2: ...R e f e r e n c e O n l y ...
Page 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Page 375: ...R e f e r e n c e O n l y ...
Page 376: ...R e f e r e n c e O n l y ...