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MagStop Clutch/Brake

MagStop Clutch/Brake
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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 OEM’s 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 Engage deck at less than full engine RPM to increase clutch life. Once clutch is engaged engine RPM can be increased to full RPM. Thread Size Torque Required Nm 3/8"(.375) UNF 31 lb.ft. 42 7/16"(.4375) UNF 50 lb.ft. 67 M10X1.5 35 lb.ft. 48 Warner Electric Roscoe Plant 5253 McCurry Road Roscoe, IL 61073 (815) 389-7761 Fax: (815) 389-7647 P-1177-2 10/00 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

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A. Symptom: Clutch will not engage Problem Possible Causes Solution - Blown fuse - Low coil resistance - Replace with new MagStop unit - Defective battery - Replace - Faulty charging system - Repair or replace - Bad wiring or connections, PTO switch - Repair or replace - Low voltage supply - Defective battery - Replace (Less than 12 VDC at clutch) - Faulty charging system - Repair or replace - Bad wiring or connectors, PTO switch - Repair or replace - Incorrect coil resistance - Damaged coil - Replace with new MagStop unit (see Step 1) - Inadequate current supply - Broken clutch lead wire -...

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