Warner Electric Electrical Evaluation - Manual

Warner Electric LLC
31 Industrial Park Road • New Hartford, CT 06057
815-389-3771
• Fax: 815-389-2582
www.warnerelectric.com
Electrical Evaluation
Warner Electric Commercial MagStop Clutch/Brake
Torque Resistance
Model (ft-lb) Nom. Nm (ohms)
CMS-175 175 237 2.45 - 2.71
CMS-200 200 271 1.74 - 1.93
Note: If bench tested with 12 volts applied, armature
may not pull away from brakepoles. Rotational motion
is required to engage clutch
Step 2 Measure the supply voltage at the clutch
(Figure 2)
1. Turn engine off.
2. Connect meter leads at the clutch connector.
3. Select meter setting for voltage reading.
4. Make sure wires will not become entangled in rotating
components of clutch.
5. Start engine and engage PTO switch.
6. Measure voltage across the leads at the connectors.
7. Voltage should be 12-14 volts DC. If clutch still
fails to operate, replace the clutch.
8. If voltage is not within 12-14 volt range consult OEMs
service manual.
Meter
Connector
Figure 1
Resistance Measurement
Meter
Connector
Figure 2
Voltage Measurement
Installation and operating notes
Clutch mounting bolt torque is critical. Failure to torque mounting bolt to
prescribed values will lead to premature failure of the clutch.
Grade 5 Mounting Bolt
Thread Size Torque Required N-m
3/8-24” UNF* 40-45 lb.ft. 54-61
7/16-20” UNF** 50-55 lb.ft. 67-75
M 10 X 1.50 55-60 N-m 55-60
* 3/8 -24 UNF Grade 5 bolt is unacceptable
** 7/16-20 UNF Grade 5 or 8 bolt is acceptable
Note: All values are for dry (unlubricated) plated bolts, please consult
fastener manufacturer if any type of locking element (thread lock
compound, patch etc.) is to be used.
Failure to torque bolt to requirements will
degrade clamping and can allow the clutch to separate from
the shaft, causing risk of personal injury.
Engage deck at less than full engine RPM to increase clutch life. Once
clutch is engaged engine RPM can be increased to full RPM.
819-0459 P-1177-2 8/11 Printed in U.S.A.
Step 1 How to Measure Clutch Coil resistance
(Figure 1)
1. Turn engine and PTO switch off.
2. Disconnect clutch at clutch connector.
3. Select meter setting for ohm reading.
4. Connect meter leads to clutch.
5. Check meter reading and refer to the chart
below for correct clutch resistance reading.
(values are @68° F)
If reading falls in acceptable range proceed to
step 2, if not replace clutch.
Table