®
R&M Materials Handling, Inc
LoadMate®
Chain Hoist
Springfield, Ohio USA
LM16-20-25 Manual
: 800 955-9967
April 2005
www.rmhoist.com
April 1, 2005
24
LM16-20-25-I&M
MANUAL-2005-0
4. Raise load block and verify that chain is going into chain contain without problems.
5.11 Upper and Lower Travel Safety Limit Switch
The Upper and Lower Travel Limit Switch is an automatic reset type switch and connected to the control
circuit. The switch housing is recessed into the underside of hoist body.
The primary limit device that controls the upper limit of travel is an emergency device only. It shall
not be used as an operational means to stop travel during normal operations. Do not permit
continuous contact between the hoist body and the load block / fall stop assembly.
The hook block activates the upper limit switch as it contacts the limit switch that is located on bottom side
of hoist body. Once the switch is activated, the
“UP”
circuit is opened. The fall stop activates the lower
limit switch when hook block is lowered to its lowest travel position. The limit switch is activated and
opens the
“DOWN”
circuit.
The lower limit position is adjustable between the lowest travel and maximum lift. It is adjusted by
repositioning the fall stop assembly on free end of load chain. The fall stop
SHALL
always be located at
least six (6) inches [150mm] from end of last chain link. The upper limit position is adjustable only when
an additional fall stop assembly is added between the hook block assembly and the hoist body.
5.12 Upper and Lower Rotary Travel Limit Switch
The rotary limit switch is adjustable and provides over-travel protection for the upper and lower limits of
hoist travel. The limit switch is connected to the control circuit.
Note: Rotary limit switch assembly cannot be added to a Hoist. The Hoist must have the
rotary limit switch assembly provided at time of initial production.
Adjustment
The position of the air-gap between the two discs (red – gray) determines the stopping place. This
position can be found by gently turning the two discs. The length of air gap determines length of reset play
in opposite direction.
To reset the rotary limit once it has tripped, the load block assembly must travel approximately 11”
[27cm] in opposite direction.
