Wiring Diagrams - Coffing Hoists Concert Series Operating, Maintenance & Parts Manual

Suspension
Use the Parts List for Basic Unit and Chaining Parts to help in
repairs in this section (See Figures 10 and 19). The lifting
motor sections must be separated at the top hook line in order
to inspect the load sheave and chain guides. See CHAIN
REPLACEMENT WITH NO CHAIN IN LIFTING MOTOR,
page 7.
POWER CORD PRECAUTIONS WITH 1-PHASE LIFTING MOTORS
Electric lifting motors require a sufficient power supply. It is especially important with single-phase voltage to ensure that the
conductors running to the lifting motor from the power source are adequate in size to handle the power requirements of the
lifting motor. Inadequate power cables and branch circuits will cause low voltage, high amperage, damage to the lifting motor,
and potential fire hazards. Such problems can be minimized by using 230V power on 115/230V lifting motors. The following are
recommendations for the conductor gage size depending on the length, horsepower, and voltage.
Table 2 - Recommended Conductor Sizes for 1-Phase Lifting Motors
HP Voltage
(1-Phase)
1/2 115V
230V
1 115V
230V
Figure 7A — Wiring Diagram for 115/230V - 1 Phase Models
For more information contact: Sievert Crane and Hoist, (708) 771-1600, parts@sievertelectric.com, www.sievertcrane.com
While this section is apart, check the following:
• Load sheave
• Chain, Chain guides and plates
• Chain support (on 2 ton models)
• Bearings
Replace parts as necessary including screws, lockwashers,
etc. When reassembled, recheck operation.
M a x i m u m L e n g t h o f P o w e r C o r d i n F e e t
14 AWG 12 AWG
40 60
200 330
0 30
120 190
11
Country Club Road
P.O. Box 779
Wadesboro, NC 28170 USA
TEL: (800) 477-5003
FAX: (800) 374-6853
10 AWG 8 AWG
100 150
520 810
50 75
310 490