Harrington Hoists and Cranes SH Hoist User Manual

EFFECTIVE November 27, 2001

HANDLING and MAINTENANCE INSTRUCTIONS

HARRINGTON

PEERLESS
ELECTRIC CHAIN HOIST

CODE SH (SINGLE PHASE)

: Not to be used for lifting personnel. Always
remain away from the load while hoist is operating.

1

CONTENTS

HARRINGTON PEERLESS (SH series) electric chain hoists are single
phase hoists with low voltage push button stations.

Please read this manual thoroughly before operating the hoist.

PRE-OPERATIONAL CHECKS

1. Check voltage supply and electrical connection ....................... 3

2. Fill gear box............................................................................... 3

3. Install load chain container to hoist body .................................. 3

4. When chain container is not used............................................. 3

5. Coat load chain with oil ............................................................. 3

6. Prevent twist in load chain......................................................... 4

7. Electrical power supply.............................................................. 4

8. Notes on trial operation ............................................................. 5

TIPS FOR SAFE OPERATION

1. Friction clutch ............................................................................ 5

2. Hang load carefully on the hook................................................ 6

3. Safety latch on hook.................................................................. 6

4. Do not lift load with multiple hoists ............................................ 6

5. Always lift load at its center of gravity ....................................... 6

6. Do not reverse direction of motor rotation quickly..................... 6

7. Do not bump trolley against beam stopper................................ 6

8. Do not pull the push button control cord ................................... 6

9. Caution when welding ............................................................... 7

10. Do not allow load to hit load chain container ............................ 7

11. Test Limit Switch periodically .................................................... 7

CARE AND MAINTENANCE

1. Gear box oil ............................................................................... 7

2. Cleaning and coating of oil to load chain .................................. 7

3. Storage...................................................................................... 7

TROUBLE SHOOTING

Chart.......................................................................................... 8

2

PREOPERATIONAL CHECKS

1. CHECK VOLTAGE AND ELECTRICAL CONNECTION
The SH series electric chain hoist are available in 110 or 220 volt single phase ratings. Check
for proper voltage supply and electrical connections before the first test operation after
installation.

2. FILL GEAR BOX
The required amount of gear oil is supplied with the hoist. Remove the oil plug from the oil-fill
port, fill with oil and replug the port.

Recommended Gear Oil:
Meropa Lubricant No. 320 -- Texaco Oil co., or Caltex Oil Co.

3. INSTALL LOAD CHAIN CONTAINER TO HOIST BODY
A vinyl chain container is a standard accessory. When the chain
container is used, install it to the hoist body (Fig. 1). Each chain
container is marked with its load chain capacity. Special
instructions will be provided with the hoist if additional chain
containers are supplied.

4. WHEN A CHAIN CONTAINER IS NOT USED
Mount a stopper on the ninth link from the end of load chain (Fig. 2)
and connect the end of load chain to hoist body. The load chain must
not be twisted (Fig.3).

Cap.

(Tons)

1/4
1//2L
1/2S

1L
1S
2L

Amount of Oil

(l)

0.6

Cushion Rubber

Stopper

Fig. 2

5. COAT LOAD CHAIN WITH OIL
For proper service of the load chain, apply a light coat of machine or gear oil.

3

Chain Container

Fig. 1

6. If your hoist is either an SH005-L or SH020-L the bottom hook is suspended by a double load
chain. The correct load chain setup is when the weld of every link faces inward (Fig. 3).
Never try to suspend a load on a twisted chain.

Welded
Part

Normal

7. ELECTRICAL POWER SUPPLY

7-1 INSTALLATION OF POWER SUPPLY CABLE (PT and GT type)

a) Suspend a 1/4" diameter steel messenger wire along the beam and hang the power supply

cable through the cable hangers without twisting the power cable.

b) Install the messenger wire (Fig. 4). For PT and GT types, the wire should be on the right

side of the cable hanger arm of the hoist.

c) A messenger wire can not be installed on a curved beam. A special T-type cable hanger

for the curved beam section is available upon request. Consult factory for the proper
number of hangers and spacing between them as they differ depending on the location and
radius of the curve in the beam.

Welded
Part

Abnormal

Fig. 3

Messenger Wire

Manual Trolley Type

4

Fig. 4

7-2 ELECTRICAL WIRING

The Single phase hoist is to be used on single phase electrical power source (110 or 220 volt).
Compared with conventional home electrical equipment, a large capacity motor is used on the
hoist. Consult you local electric codes for proper wiring of the single phase hoist.
a) Connect RED and WHITE lead wires of the power supply cable to the switch in the main
switch box. Cables must be securely connected for safe operation.
b) Ground wiring

The GREEN wire with YELLOW stripe is the ground wire. This wire should always be
connected to a suitable ground. Unless the wire is grounded, operators may sometimes
feel a shock when touching any part of the hoist or chain. Do not paint the trolley running
surface of the beam when electrical grounding work is not provided on the copper
conductor.

c) Connection by wall outlet and plug

The best way of connection to power source is directly from power supply cable to main
power switch. When using a plug, it must be grounded.

8. NOTES ON TRIAL OPERATION

After initial installation of the hoist and before each day's use, perform a trial operation to
ensure the hoist functions properly.
a) Check voltage supply before each day's use. IF the voltage is not within plus or minus 10%

of the rated value, electrical devices may not function properly.

b) Check the control button. The depression of "UP" button must lift the load chain and the

depression of the "DOWN" button must lower the chain.

TIPS FOR SAFE OPERATION

1. FRICTION CLUTCH

The SH electric chain hoist is equipped with a built-in friction clutch as the overwinding
protection device. This clutch eliminated complex electrical circuitry and its simple
construction reduces trouble to a minimum.
a) Do not overload the hoist.

The friction clutch is not an overload protection device. The load to be lifted must be

within the capacity of the hoist. When the hoist is overloaded in excess of the slip torque,

the friction clutch slips allowing the motor to run freely, protecting the other parts. However,
if the hoist is overloaded close to the slip torque and if the load is forcibly lifted with the
clutch slipping, the lifted load may fail.

b) Do not overwind the hoist

The friction clutch will slip allowing the motor to run free when either the rubber cushion
hits the load chain guide or when the chain is overlifted or overlowered. However, do not
use this safety device as a means to stop the hoist.

c) Do not readjust the setting of friction clutch

The clutch is preset to function correctly before the hoist leaves the factory. Do not attempt
to readjust the clutch setting in the field.

5

2. HANG LOAD CAREFULLY ON THE HOOK

Hang the load precisely (Fig. 5). Loads should not be hung forcibly or bound directly to the
hook (Fig. 6). This could cause the hangers either to slip off or become deformed. We
recommend the use of slings between the hook and the load. The particular sling used should
be seated on the load-bearing surface of the hook. Do not put load on the tip of the hook.

Safety
Latch

Safety
Latch

Fig. 5

3. SAFETY LATCH ON HOOK

Before hoisting, properly position the safety latch (Fig. 5). Safety latches are provided on both
hooks to minimize the danger of the load slipping off the hook.

4. DO NOT LIFT LOAD WITH MULTIPLE HOISTS

It is NOT recommended to overload any hoist or to lift with two or more hoists. IF such is
unavoidable, each hoist must be capable of supporting a full, evenly distributed load and
should be designed by the factory for multiple hoist lifting.

5. ALWAYS LIFT LOAD AT CENTER OF GRAVITY

An unbalanced load may slip off the hook. In the case of a trolley type, cocked trolley may
force the beam to swing sideways or damage the trolley.

6. DO NOT REVERSE DIRECTION OF MOTOR ROTATION QUICKLY

Always bring motor to a complete stop when you move from one operation (e.g., lifting) to the
next (e.g. lowering). Continued jogging (rapid reversal of motor) may lead to premature failure
of electrical contactors and motor. Motor will not reverse direction if motor is not brought to a
complete stop when under load.

Fig. 6

7. DO NOT BUMP TROLLEY AGAINST BEAM STOPPER

Bumping into the beam stopper may damage the trolley or hoist mechanism. A stopper should
be attached at each end of the beam to prevent the trolley from running off the beam.

8. DO NOT PULL THE PUSH BUTTON CORD

Electrical trouble may result from attempting to move the trolley by pulling the push button
control cord. Always move the trolley by pulling/pushing on the hook or load.

6

9. EXERCISE CAUTION WHEN WELDING

To avoid electrical shock, keep the load chain and the hook away from the grounding wire of
the electrical welder.

10. DO NOT ALLOW LOAD TO HIT LOAD CHAIN CONTAINER
Do not hang load directly by the bottom hook without the use of a sling or other device when
lifting to full height as the load could hit and push up the load chain container.

11. TEST LIMIT SWITCH PERIODICALLY
The SH005-S through SH020-L hoists are supplied with an upper limit switch. Periodically
(2-3 months) test the limit switch by hand to assure that it is functioning properly.

CARE AND MAINTENANCE

1. GEAR BOX OIL
The oil in the gear box need not be replaced under normal use.* If the hoist is used more
frequently than normal, the oil should be replaced every two years.

Recommended Gear Oil:
Meropa Lubricant No. 320 - Texaco Oil Co., or Caltex Oil Co.

2. CLEANING AND COATING OF LOAD CHAIN WITH OIL
Clean the load chain occasionally and apply a light coat of machine or gear oil to assure long
service life and safe operation.

3. STORAGE
a) When the hoist is installed outdoors, do not expose to rain or dew.
b) Hang the hook suspension type from a ceiling or on a wall.
c) Do not store the hoist in a humid place.

* NORMAL SERVICE---operation with random loading at or below rated capacity or uniform

loading not exceeding 65% of rated capacity for not more than 25%
of the time.

HEAVY SERVICE -----operation with loads less than or equal to rated capacity which

exceed normal service limits.

SEVERE SERVICE---operation with loads less than or equal to rated capacity involving

normal or heavy service with abnormal conditions.
(service classes from ASME B30.16-1987)

7

TROUBLE SHOOTING

Trouble Cause Remedy Remarks

Will not move.
Will not lift.

Broken fuse Replace fuse of same

rating

Broken limit switch Replace limit switch
Broken condensor Replace with new ones. Replacement should be

Voltage drop Check the voltage with

a voltohm meter and
check wiring.

Discontinuity in power
supply cable
Discontinuity in push
button control cord

Overload Check the weight of the

Slipping due to poor
friction clutch
performance

Check discontinuity in
the cable where cable is
subject to frequent
bending, and repair
cable and cord.

load.
Replace with factory

adjusted friction clutch.

Do not use copper wire
as substitute. Do not
use fuse of larger rating.

made as one complete
set (1 pair).

Interrupt the operation.

The motor turns
immediately but does
not rotate.

Brake slips Worn brake shoe Replace brake shoe if

necessary.

Clicking sound is heard Worn load chain

Rusted load chain

Trolley will not stop Angulation of beam

Oil-stained beam

Electrical leak Poor grounding work Provide correct

Foreign matters or
moisture depositing on
electrical parts

Oil leak Oil plug missing Install the regular oil

Loose oil plug Tighten the plug.

Oil plug packing missing Use new packing.

Replace load chain if
necessary.

Correct the angulation
Remove oil, clean

grounding
Remove foreign matter

from or dry the electrical
parts.

plug.

Leak at places other
than the electric chain
hoist may sometimes be
responsible.

If oil leak occurs at
places other than oil
plug, disassemble and
check thoroughly for the
cause and repair.

8

www .harringtonhoists.com

Harrington Hoists, Inc.
401 West End Ave.
Manheim, P A 17545
Phone: [phone]
T oll Free: 800-233-3010
Fax: [phone]

Harrington Hoists - Western Division

2341 Pomona Rincon Rd. #103

Corona, CA 92880

Phone: [phone]

T oll Free: 800-317-711 1

9

Fax: [phone]