LEESON 143-5TC Double C-Face Coupler User Manual

LEESON Hardware

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Tools required for installation and servicing:
3/8” hex wrench

5/16” nut driver

5/16” hex wrench

Torque wrench

1/4” screwdriver

3/16” hex wrench

8” adjustable wrench

Installation and Service Instructions

for 56/143-5TC Double C-Face Coupler

Important

Please read these instructions carefully
before installing, operating, or servicing
your brake. Failure to comply with these
instructions could cause injury to personnel
and/or damage to property if the brake is
installed or operated incorrectly. For defini-
tion of limited warranty/liability, contact
Leeson Electric Corporation, P.O. Box 241,
2100 Washington Street, Grafton, WI
53024-0241, (262) 377-8810.

Caution

1. Installation and servicing must be made

in compliance with all local safety codes
including Occupational Safety and
Health Act (OSHA). All wiring and elec-
trical connections must comply with the
National Electric Code (NEC) and local
electric codes in effect.

2. Do not operate the brake in

atmospheres containing explosive
gases or dusts.

3. To prevent an electrical hazard, discon-

nect power source before working on
the brake. If power disconnect point is
out of sight, lock disconnect in the off

position and tag to prevent accidental
application of power.

4. Make certain power source conforms to

the requirements specified on the brake
nameplate.

5. Be careful when touching the exterior of

an operating brake. Allow sufficient time
for brake to cool before disassembly.
Surfaces may be hot enough to be
painful or cause injury.

6. Do not operate brake with housing

removed. All moving parts should be
guarded.

7. Installation and servicing should be per-

formed only by qualified personnel
familiar with the construction and opera-
tion of the brake.

8. For proper performance and operation,

only genuine Stearns parts should be
used for repairs and replacements.

9. After usage, the brake interior will con-

tain burnt and degraded friction material
dust. This dust must be removed before
servicing or adjusting the brake.

DO NOT BLOW OFF DUST using an air
hose. It is important to avoid dispersing

dust into the air or inhaling it, as this may
be dangerous to your health.

a) Wear a filtered mask or a respirator

while removing dust from the inside of a
brake.

b) Use a vacuum cleaner or a soft brush

to remove dust from the brake. When
brushing, avoid causing the dust to
become airborne. Collect the dust in a
container, such as a bag, which can be
sealed off.

10. Caution! While the brake is equipped

with a manual release to allow manual
shaft rotation, the motor should not be
run with the manual release engaged, to
avoid overheating the friction disc(s).

Warning! Do not apply overhung or side
load to brake output shaft

General Description

The 56,700 Series coupler is a spring-set,
electrically released brake, containing either
one or more rotating friction discs (4) driven
by a hub (16) mounted on the motor shaft.
The double C-face allows the brake to directly
couple a C-face motor to a C-face gear
reducer.

Figure 1

(See Page 4

For replacement parts refer to sheet
part number 8-078-906-07.
Instructions and parts list also avail-
able at www.rexnord.com/stearns.

ELECTRIC MOTORS

GEARMOTORS AND DRIVES

P/N 8-078-905-68

effective 03/25/2005

LEESON ELECTRIC

P.O. BOX 241

2100 Washington Street

Grafton, WI 53024-0241

U.S.A

A Subsidiary of Regal-Beloit Corporation

Drain Plug
(WASHGUARD brakes only)

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