Manitowoc MLC650 Service Maintenance Manual

Reference Only
HOISTS MLC650 SERVICE/MAINTENANCE MANUAL
5-4
Published 09-09-16, Control # 229-09
Installation
1. Connect the electrical wires to the new limit switch as
follows.
a. Remove the limit switch cover (9).
b. Insert the wires of the electrical cable into the limit
switch. Connect the cable wires and the jumper wire
to the correct terminals in the limit switch (see
View C).
c. Install and tighten the cable restraint connector (10)
to the limit switch.
d. Install the limit switch cover.
2. Using the screws (7), install the limit switch.
Adjustment
NOTE: The limit switch (8) must stop the drum (4) when a
minimum of three to four wraps of rope remain on
the first layer.
1. Adjust the limit switch as follows.
a. Make sure the rollers (2) contact the drum (see
Views A and D).
b. Turn the adjusting screw (6) until the 44 mm (1.7 in)
dimension (see View B) is obtained.
c. Tighten the jam nut (5) against the mounting tab
(11) to lock the adjusting screw.
d. Spool several wraps of wire rope onto the drum,
then pay out the wire rope. The drum must stop with
three to four wraps of wire rope remaining on the
first layer.
e. Repeat the adjustment procedure if necessary.
2. Make sure the return springs (12) have sufficient tension
to hold the rollers firmly against the drum.
If necessary, adjust spring tension as follows.
a. Adjust the eyebolt (13) of each spring to the 35 mm
(1.4 in) dimension (see View D).
b. Tighten the two eyebolt jam nuts (14) to lock
adjustment.
3. Adjust the lever kickstand as follows.
NOTE: Use the following steps when removing and
installing the lever assembly.
a. To overcome the spring pressure when removing
the lever assembly, remove the cotter pin (15) and
tighten the nut (16) against the nylon tube (17) until
the lever is locked in a secure position.
b. When the lever assembly is installed, make sure
that the cotter pin is installed with the nut in the
locked position (see View D).
Weekly Maintenance
1. Check the limit switch (8) for correct operation. Pay out
the wire rope from the drum. The drum must stop with
approximately three to four wraps of wire rope remaining
on the first layer.
2. Make sure the capscrews (3) holding rollers on the lever
shaft are tight.
3. Make sure the return springs (12) have sufficient tension
to hold the bail limit rollers against the bare drum. To
increase the spring tension, adjust the eyebolt (13) of
each spring as needed.

Manitowoc MLC650 Specifications

General

Brand	Manitowoc
Model	MLC650
Category	Construction Equipment
Language	English