User Manual LiftMaster LJ8950W LightDuty Commercial Door Operator

Documents for LiftMaster LJ8950W

The following documents are available:
User Manual Photos
LJ8950W photo
A
B
B
B
C
E
F
D
G
G
G
G
H
12V Replacement Motor
Model 041D1624-2
Specifications
Volts ...................................120 Vac - 60 Hz, Only
Current ...........................................1.5 AMP
Rated Load ...................................385 in/ lb./sec.
Included Items
Motor and Bracket Assembly .............................. (1)
WARNING: This product can expose you to chemicals including
lead, which are known to the State of California to cause cancer or
birth defects or other reproductive harm. For more information go
to www.P65Warnings.ca.gov
To prevent possible SERIOUS INJURY or DEATH:
Disconnect ALL electric and battery power BEFORE performing ANY
service or maintenance.
To prevent damage to the receiver logic board, DO NOT touch printed
circuit board of replacement receiver logic board during installation.
ALWAYS wear protective gloves and eye protection when changing the
battery or working around the battery compartment.
9. Remove wires from the motor
bracket. Remove the E-Clip and
push clevis pin down, then remove
the 4 screws (5/16" and 1/4")
holding the motor in place (H).
10. Lift motor bracket up and off of
the clevis pin, remove chain from
motor sprocket and discard motor.
11. Reinstall new motor, ensure chain
is on unit sprocket, place chain
over motor sprocket, push clevis
pin into place, install C-clip. Fasten
motor down with 4 screws.
12. Reinstall the cover. Verify that the
tabs in the cover align with the
holes in the top of the chassis.
Route the wire harnesses and
wires through the cover (G).
13. Install the receiver logic board
and connect the wire harnesses.
Ensure the wire harnesses are
connected properly. Route the
antenna through the channel in the
cover. Install receiver logic board
cover.
14. Reconnect the wires to the quick
connect terminals (C).
15. Install the battery (if applicable)
and connect the battery
connectors. Install the battery
cover.
16. Reconnect power.
Refer to your manual to reset your
travel and force settings.
8. Remove the four screws
securing the cover to the
chassis (G).
6. Unplug the wire
harnesses from the
receiver logic board (E).
7. Remove the four screws
securing the receiver
logic board, remove and
discard (F).
4. Label wires for reinstallation.
Disconnect the wires from the quick
connect terminals (C).
NOTE: If there is a resistor located on
the green wire traps, do not remove.
5. Remove the receiver logic board
cover (D).
1. Disconnect power.
2. Open the front panel (A).
3. Remove the battery cover. Disconnect the
battery (if applicable). Remove the battery
and set aside (B).
5/16"
screws
1/4"
screws
1
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Summary of Contents for LiftMaster LJ8950W: