P-1373
819-0072
Warner Electric Compressor Clutch
Service & Installation Instructions
An Altra Industrial Motion Company
Failure to follow these
instructions may result in product
damage, equipment damage, and
serious or fatal injury to personnel.
General
This compressor clutch has been developed
specifically for automobile air conditioning
applications. Properly installed, it will provide
maintenance free service. The clutch, using a
stationary field principle, does not require slip
rings or brushes.
The clutch consists of two major components,
a stationary magnetic field assembly and a rotorpulley assembly. The field assembly is mounted
on bosses on the compressor. The rotorpulley assembly is mounted to the compressor
crankshaft and driven by V-belts from the engine
crankshaft pulley. Electricity energizes the
clutch field to couple the clutch magnetically,
thus driving the compressor. Deenergization of
the field releases the clutch and uncouples the
compressor.
Wiring
The coil in the field assembly has a single
leadwire (hot) and is grounded to the field shell.
It will only be necessary to connect this leadwire
into the electrical system as recommended by
the manufacturer of the air conditioning unit.
Figure 1 is an example of a typical system.
Figure 1
Installation
2 Warner Electric • 800-825-9050 P-1373 • 819-0072
Step 1
Position the field assembly (1) against the
compressor bosses, aligning the field mounting
holes with the bolt holes in the bosses. Insert four
capscrews and lockwashers (3) furnished with
the clutch into the bolt holes of the compressor.
Tighten the capscrews to a wrench torque of
7 - 10 ft./lbs. (85 - 120 in./lbs.). Use caution not
to strip the threads in the compressor body.
Step 2
The compressor shaft must be clean and free
from burrs. Check the woodruff key for proper
position and seating.
Step 3
Slide the rotor pulley assembly (2) on to the
tapered shaft (aligning the keyway with the
woodruff key in the shaft). Secure the rotor pulley
assembly with the washer (4) and selflocking
capscrew (5) provided with the clutch.
Tighten the self-locking capscrew to a wrench
torque of 15 - 20 ft./lbs. (180 - 240 in./lbs.).
Step 4
Rotate the pulley assembly manually to assure
that there is no interference between the field
and rotor. If any interference occurs, a rubbing
noise can be heard as the pulley rotates. In case
of rubbing or other mechanical interference,
disassemble the clutch and repeat the installation
of the field assembly.
Step 5
To disassemble the rotor-pulley assembly from
the compressor, remove the self-locking
capscrew and washer and insert a 5/8-11 UNC2B capscrew in the threaded portion of the hub.
The pressure exerted by the capscrew on the
end of the compressor shaft will force off the
rotor pulley assembly without damage to the
clutch or compressor. Do not use a wheel puller
on the outer diameter of the pulley, as this can
result in damage to the clutch bearing. Warranty
voided if clutch is removed from shaft without
using a 5/8-11 UNC bolt in the hub.
Step 6
Clutch Burnish - Install the belts per vehicle
manufacturer specifications. Run the engine at
2000-2500 RPM and cycle the clutch ON and
OFF at a rate of 10 to 15 times per minute for
50 cycles minimum. This procedure will help
bring the clutch up to the operating torque
capacity.
Note: To prevent electrical system damage,
use the vehicle A/C controls to cycle the
clutch.
Service
This compressor clutch automatically
compensates for wear requiring no adjustment
throughout the life of the clutch. Do not lubricate
the unit. If the clutch should fail to operate, check
the electrical circuit to be sure that the proper
voltage is being supplied to the clutch. Do not
attempt to make any mechanical adjustments on
the clutch.
Warner Electric • 800-825-9050
P-1373 • 819-0072 3
Warranty
Warner Electric LLC warrants that it will repair or replace (whichever it deems advisable) any product
manufactured and sold by it which proves to be defective in material or workmanship within a period of one (1)
year from the date of original purchase for consumer, commercial or industrial use.
This warranty extends only to the original purchaser and is not transferable or assignable without Warner Electric
LLC’s prior consent.
Warranty service can be obtained in the U.S.A. by returning any defective product, transportation charges
prepaid, to the appropriate Warner Electric LLC factory. Additional warranty information may be obtained by
writing the Customer Satisfaction Department, Warner Electric LLC, 449 Gardner Street, South Beloit, Illinois
61080, or by calling 815-389-3771.
A purchase receipt or other proof of original purchase will be required before warranty service is rendered. If
found defective under the terms of this warranty, repair or replacement will be made, without charge, together
with a refund for transportation costs. If found not to be defective, you will be notified and, with your consent, the
item will be repaired or replaced and returned to you at your expense.
This warranty covers normal use and does not cover damage or defect which results from alteration, accident,
neglect, or improper installation, operation, or maintenance.
Some states do not allow limitation on how long an implied warranty lasts, so the above limitation may not apply
to you.
Warner Electric LLC’s obligation under this warranty is limited to the repair or replacement of the defective
product and in no event shall Warner Electric LLC be liable for consequential, indirect, or incidental damages of
any kind incurred by reason of the manufacture, sale or use of any defective product. Warner Electric LLC neither
assumes nor authorizes any other person to give any other warranty or to assume any other obligation or liability
on its behalf.
WITH RESPECT TO CONSUMER USE OF THE PRODUCT, ANY IMPLIED WARRANTIES WHICH THE
CONSUMER MAY HAVE ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL
CONSUMER PURCHASE. WITH RESPECT TO COMMERCIAL AND INDUSTRIAL USES OF THE PRODUCT,
THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES, WHETHER
EXPRESSED OR IMPLIED BY OPERATION OF LAW OR OTHERWISE, INCLUDING, BUT NOT LIMITED TO,
ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. This warranty gives you specific legal rights and you may also have
other rights which vary from state to state.
Changes in Dimensions and Specications
All dimensions and specifications shown in Warner Electric catalogs are subject to change without notice.
Weights do not include weight of boxing for shipment. Certified prints will be furnished without charge on request
to Warner Electric.
www.warnerelectric.com
4578 East Park 30 Drive
Columbia City, IN 46725
800-389-3771
Fax: 815-389-2582
P-1373 819-0072 3/14 Printed in USA
An Altra Industrial Motion Company
www.altramotion.com
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