Manitowoc MLC165-1 Service Maintenance Manual

Reference Only
Manitowoc Published 05-26-17, Control # 238-02 5-43
MLC165-1 SERVICE/MAINTENANCE MANUAL HOISTS
5
5
MINIMUM BAIL LIMIT (DRUM 1 AND 2)
See Figure 5-29 for the following instructions.
The minimum bail limit for the front drum is shown. The
minimum bail limit for the rear drum is similar. The following
procedures apply to both drums.
The OPTIONAL minimum bail limit is a protective device
which automatically stops the corresponding drum when
there are 3 to 4 wraps of wire rope remaining on the first
layer of the drum (View A).
The drum can be operated in the hoist direction when the
minimum bail limit switch is tripped open.
Limit Switch Replacement
Field adjustment should not be necessary unless a new limit
switch is installed.
Removal
1. Land the load from the drum being adjusted.
2. Stop the engine.
3. Remove the screws (10) and the limit switch (9).
4. Remove the limit switch cover (16).
5. Disconnect the electric wires, including the jumper wire,
inside the limit switch (9, View C).
6. Unscrew the cable connector (11) and carefully pull the
electric cable and wires away from the limit switch (9).
7. Loosen the screw (15) and remove the limit switch arm
(8) from the limit switch shaft (14).
Installation
1. Connect the electric wires to the new limit switch:
a. Remove the limit switch cover (16).
b. Install the wires, including the jumper wire, and
connect them to the correct terminals in the limit
switch (View C).
c. Securely tighten the cable connector (11) to the limit
switch (9).
d. Install the limit switch cover (16).
2. If needed, re-orient the limit switch head (13, View B):
a. Remove the screws (12).
b. Rotate the limit switch head (13) to the position
shown in View B.
c. Reinstall the screws (12).
3. Install the limit switch arm (8) onto the limit switch shaft
(14) as shown in View B. Do not tighten the screw (15)
yet.
4. Using the screws (10), install the limit switch (9).
Adjustment
1. Start the engine.
2. Pay out the wire rope from the corresponding drum until
the bail limit rollers (1) are against the bare drum (3) with
3 to 4 full wraps of the wire rope remaining on the drum
(View A).
3. Hold the roller on the limit switch arm (8) against the
actuator (5).
4. Turn the limit switch shaft (14) toward the actuator only
enough to click the limit switch (9) open, then hold the
shaft.
5. Securely tighten the screw (15, View B) to secure the
limit switch arm (8) to the limit switch shaft (14).
6. Test the installation:
a. Spool six to seven wraps of wire rope onto the load
drum.
b. Pay out the wire rope.
c. The drum must stop when there are three to four
wraps of wire rope remaining on the drum.
d. If necessary, repeat the adjustment.
Weekly Maintenance
Check the minimum bail limit switch for proper operation:
1. Pay out the wire rope from the drum (3). The drum
should stop when there are 3 to 4 wraps of the wire rope
remaining on the first layer. Adjust the minimum bail limit
if necessary.
2. Check that the cap screws (2) are tight.
3. Check that the springs (6) have sufficient tension to hold
the bail limit rollers (1) against the bare drum (3). To
increase the spring tension, adjust the eyebolts (7) as
needed.
WARNING
Falling Load Hazard
Do not operate the drum with less than 3 or 4 full wraps of
wire rope remaining on the drum. Doing so can cause the
wire rope to be pulled out of the drum and the load to fall.

Manitowoc MLC165-1 Specifications

General

Brand	Manitowoc
Model	MLC165-1
Category	Construction Equipment
Language	English