Installation, Instructions, Danger – Autoquip FREIGHTLIFT FLM User Manual
Page 64
64
K. INSTALLING SLACK CHAIN SENSING SWITCHES (Ref. Figures 33a & 33b)
Items needed:
Qty
Description
2
Slack Chain Sensing Switch Kit
These kits have been shipped loose to be field mounted, wired, and adjusted per the
procedure below. These switches are intended to turn off the motor and stop
movement of the carriage whenever a slack/broken chain status is sensed.
DANGER
!
To avoid personal injury or death, the procedures described in this section
should only be performed by qualified service personnel.
1. To install the slack chain sensing switches, first gain a safe access to the drive base
at the top of the masts. There is a slack chain sensing switch kit provided for each
lifting chain, (2) total.
2. With the carriage hanging from the chains, each tensioner arm will be pushing
towards the sensing switch arm. Each switch is wired to be normally open – held
closed.
a. Install each switch assembly onto its respective Unistrut channel as shown
in Figure 33a.
b. With the sensing switch arm mounted hanging down & tightened, slide the
sensing switch assembly in the Unistrut channel towards the tensioner
arm until the switch arm pushes against the tensioner arm and the
switches electrical contacts close (listen for the “click”). See Fig. 33b.
c. Tighten the two bolts holding the switch mounting angle to the Unistrut.
NOTE: To change the actuation direction of the switch, remove the switch head. Change
the actuating control knob/mechanism to the desired actuation direction.
(Reference Figure 32)
3. After installing the slack chain sensing switches, you must test them to make sure
they are adjusted and set correctly.
a. stack some empty pallets under the carriage, surface must be level
b. operate the lift and lower the empty carriage onto the pallets
c. when the carriage makes contact with the pallets and as soon as the lifting
chains go slack, the motor should stop.
CAUTION: Be ready to press the emergency stop button if the motor doesn’t
stop when chains go slack.
INSTALLATION
INSTRUCTIONS