11
Country Club Road
P.O. Box 779
Wadesboro, NC 28170 USA
TEL: (800) 477-5003
FAX: (800) 374-6853
Gearing
Refer to Figures 8, 12 and 22.
As disassembly is extensive for gearing, disconnect the hoist
and move it to a workbench.
1. Remove the electrical cover.
2. Remove the electrical panel.
3. Remove the brake assembly and the limit switch assembly.
4. Drain the oil from the gearbox.
5. Remove the four screws that attach the gearbox cover to the
gear housing and remove the gearbox cover. The limit switch
drive shaft will come along with the 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
that 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 that they are properly
seated and in accordance with the correct wiring diagram.
Before placing the hoist back into service, check the brake
adjustment and limit switch settings.
Suspension
Refer to Figures 12 and 22.
The hoist 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 HOIST, page 8.
While this section is apart, check the following:
• Load Sheave
• Chain
• Chain guides and plates
• Bearings
• Chain support (on 2 ton models)
Replace parts as necessary including screws, lockwashers,
etc. When reassembled, recheck the limit switch settings. See
LIMIT SWITCH ADJUSTMENT, page 8.
Figure 8 - Assembled Gearing
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
HP
Voltage
14 AWG
12 AWG
10 AWG
8 AWG
(1-Phase)
Table 5 - Recommended Conductor Sizes for 1-Phase Hoists
1/4
115V
75
120
190
300
230V
350
560
900
POWER CORD PRECAUTIONS WITH 1-PHASE HOISTS
Electric hoists require a sufficient power supply. It is especially important with single-phase voltage to ensure that the
conductors running to the hoist from the power source are adequate in size to handle the power requirements of the hoist.
Inadequate power cables and branch circuits will cause low voltage, high amperage, damage to the hoist, and potential fire
hazards. Such problems can be minimized by using 230V power on 115/230V hoists. The following are recommendations for the
conductor gage size depending on the length, horsepower, and voltage.
1
115V
0
30
50
75
230V
120
190
310
490
1/2
115V
40
60
100
150
230V
200
330
520
810
Do not disassemble or readjust the clutch, or replace
it with a clutch assembly from another hoist. 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.
