10
Electrical Parts and Brake
1. Refer to Figures 14 and 15. Remove the cover to access the
controls. Single-phase models also have a starting switch and
capacitor mounted on the motor as shown in Figure 14. The
terminal blocks and end clamps snap off of the rails on the
plate using a small screwdriver. DO NOT SLIDE THE END
CLAMPS.
The contactor can be slid off the rail, but must be snapped on.
Where the contactor fits the rail, one side has springs or pads
that apply pressure against the edge of the rail. By pressing
against that side at the base of the contactor, you can snap
the part on or off using a rotating action. Note the numbers
that label the terminals on the contactor and orient the part as
shown in Figures 7A-7C. Single-phase contactors have a
small jumper that is not present on the 3-phase (note the 3
and 5 terminals on the reversing contactor in Figure 7A).
2. Remove the electrical panel by removing the stand-off
screws (See Figures 14 & 15). The limit switch and brake are
now accessible as shown in Figure 5.
3. Remove the transformer bolted to the back of the panel plate
if it requires replacement.
4. Refer to Figure 13 to disassemble the brake. See BRAKE
ADJUSTMENT on page 8 to properly set the brake.
5. Refer to Figure 16 to disassemble the limit switch. See
LIMIT SWITCH ADJUSTMENT on page 8 to properly set
the upper and lower limits of travel.
6. Refer to Figure 17 for repairs on the pushbutton station. Also
refer to the wiring diagram inside the electrical cover or
Figures 7A, 7B and 7C for wiring instructions.
Motor
Refer to Figures 11 and 12.
The lifting motor’s motor is located on the opposite end to that
of the electrical parts, but the two are tied together with
electrical leads running through the housing.
1. If it is necessary to replace or repair the motor,
DISCONNECT THE LIFTING MOTOR FROM THE POWER
SUPPLY and remove the electrical cover.
2. Loosen the screw clamps on the terminal blocks and
reversing contactor to disconnect the motor leads
(See Figures 14 and 15).
3. Remove the four motor mounting bolts attaching the motor
to the housing. It will come loose at the motor coupling.
4. Inspect the motor coupling, motor shaft and all the bearings.
Replace as necessary.
5. Install new or repaired motor according to the wiring diagram
located inside the electrical cover or Figures 7A, 7B and 7C.
Gearing
Use the Replacement Parts List for Basic Unit and Gearbox
Parts to help in repairs on gearing (See Figures 10 and 18). As
disassembly is extensive for gearing, disconnect the lifting
motor and move it to a workbench.
1. Remove electrical cover.
2. Remove electrical panel.
3. Remove brake assembly.
4. Drain oil from the gearbox.
5. Remove the four screws attaching the gearbox cover to the
gear housing and remove the gearbox cover.
6. Inspect gears for broken or severely worn teeth and inspect
all bearings. Replace as necessary. The overload slip clutch
is factory calibrated and must not be disassembled or
readjusted.
7. Reassemble in reverse order of disassembly making sure
the gasket is in place and in good condition. Coat gasket
with Permatex
®
or other gasket cement. Extreme care should
be taken to avoid damage to oil seals.
8. Check all wire terminals to be sure they are properly seated
and in accordance with wiring diagram. Before placing
lifting motor back into service, check brake adjustment.
Failure to follow proper lockout/tagout procedures may
present the danger of electrical shock.
TO AVOID INJURY:
Disconnect power and lockout/tagout disconnecting
means before removing cover or servicing this
equipment.
Do not disassemble or readjust clutch, or replace with
a clutch assembly from another lifting motor. Doing so
will void the warranty and may create an unsafe
condition. If replacement is needed due to wear or
loss of adjustment, always use a new clutch assembly.
Country Club Road
P.O. Box 779
Wadesboro, NC 28170 USA
TEL: (800) 477-5003
FAX: (800) 374-6853
Figure 5 — Brake and Limit Switch Assembly
Spring
Guide
Plate
Silver Nut
(Down)
Gold Nut
(Up)
Brake
Assembly
Limit Switch
Assembly
Figure 6 - Assembled Gearing
For more information contact: Sievert Crane and Hoist, (708) 771-1600, parts@sievertelectric.com, www.sievertcrane.com
