Manitowoc MLC165-1 Service Maintenance Manual

Reference Only
Manitowoc Published 05-26-17, Control # 238-02 5-37
MLC165-1 SERVICE/MAINTENANCE MANUAL HOISTS
5
5
MINIMUM BAIL LIMIT (DRUM 3)
See Figure 5-26 for the following procedure.
The OPTIONAL minimum bail limit is a protective device
which automatically stops the auxiliary drum (Drum 3) when
there are 3 to 4 wraps of wire rope remaining on the first
layer of the auxiliary drum (View A).
The auxiliary drum can be operated in the hoist direction
when the minimum bail limit switch is tripped open.
Field adjustment should not be necessary unless a new limit
switch is installed.
Limit Switch Replacement
Removal
1. Land the load from the auxiliary drum.
2. Stop the engine.
3. Remove the screws (13) and remove the limit switch (5).
4. Remove the limit switch cover (10).
5. Disconnect the electric wires, including the jumper wire,
inside the limit switch (5, View C).
6. Unscrew the cable connector (16) and carefully pull the
electric cable and wires away from the limit switch (5).
7. Loosen the screw (12) and remove the limit switch arm
(4) from the limit switch (5).
Installation
1. Connect the electric wires to the new limit switch (5):
a. Remove the limit switch cover (10).
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 (16) to the limit
switch (5).
d. Install the limit switch cover (10).
2. If needed, re-orient the limit switch head (9, View B):
a. Remove the screws (8).
b. Rotate the limit switch head (9) to the position
shown in View B.
c. Reinstall the screws (8).
3. Install the limit switch arm (4) onto the limit switch shaft
(5) as shown in View B. Do not tighten the screw (12)
yet.
4. Using the screws (13), install the limit switch (5).
Adjustment
1. Start the engine.
2. Pay out the wire rope from the auxiliary drum until the
bail limit rollers (2) are against the bare drum 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 (4) against the
actuator bracket (14).
4. Turn the limit switch shaft (11) counterclockwise (when
viewing the shaft) only enough to click the limit switch
open, then hold the shaft.
5. Securely tighten the screw (12, View B) to secure the
limit switch arm (4) to the limit switch shaft (11).
6. Test the installation:
a. Spool six to seven wraps of wire rope onto the
auxiliary 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 auxiliary drum (1). The
drum should stop when there are 3 to 4 wraps of the wire
rope remaining on the first layer. Adjust the limit switch
(5) if necessary.
2. Check that the cap screws (15) are tight.
3. Check that the springs (6) have sufficient tension to hold
the bail limit rollers against the bare drum. To increase
the spring tension, adjust the eyebolts (7) as needed.
WARNING
Falling Load Hazard
Do not operate the auxiliary 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