Warner Electric CB Series User Manual

P-2026-WE
SM592-gb-02/08

Wrap Spring Clutches & Brakes

CB & Super CB Series

Service Manual

CONTENTS

1 Assembly instructions CB-2 - CB-5 2-3

1.1 Disassembly 3

1.2 Removal of anti-overrun spring 3

1.3 Assembly 3
2 Assembly instructions CB-6 - CB-10 4-5

2.1 Disassembly 5

Exploded drawing
CB-2 - CB-5

CW

2.2 Removal of anti-overrun spring 5

2.3 Assembly 5
3 Service information 6

3.1 Adjustment of the control collar 6

3.2 Actuator setting 6
4 Lubrication 7

CCW

Overtravel OT

CB-2: 2,3 - 4,8 mm
CB-4: 4,8 - 7,8 mm
CB-5: 3,8 - 6,3 mm

OT

Stop collar

Actuator

1 Assembly instructions CB-2 - CB-5

1 Circlip 10 Coil assembly

2 Input hub 11 Actuator assembly

3 Control collar 12 Anti-backup hub

4 Clutch spring 13 Dust cover

5 Brake spring 14 Brake hub

6 Anti-backup spring 15 Screw

7 Anti-overrun spring 16 Spring pin

8 Mounting plate 17 Set screw

9 Shaft assembly 18 Screw

CB-Products are shipped as complete and pre-set units. Disassembly and assembly is only needed if
modifications or repair work is required.

The exploded drawing shows a CB-5 unit. The principle also applies to the CB-2 and CB-4 units.

2 Warner Electric Europe • [phone] P-2026-WE • 11/12

1.1 DISASSEMBLY

1. Brake engaged, input hub (2) freely rotatable, remove circlip (1).

2. Remove input hub (2) by rotating in the drive direction (remove anti-overrun spring (7), if present).

3. Remove control collar (3), by extracting towards the control tang of clutch spring (4).

4. Remove springs (clutch and brake).

5. If necessary remove anti-backup spring (6), (13), (16). To remove the spring pin (16), special tools are
required.

1.2 REMOVAL OF ANTI-OVERRUN SPRING (7)

All CB units are normally equipped with an anti-overrun spring (7). If the anti-overrun is not required, e.g. the
input hub (2) must be able to rotate in both directions, execute the following :

1. Mark the spring tang location on control collar (3).

2. Fully wrap down the brake spring (output in stop position).

3. Remove circlip (1) and input hub (2).

4. Remove the anti-overrun spring (7).

5. Assemble the input hub (2) with circlip (1).

6. Check the overtravel specification (OT).

1.3 ASSEMBLY

1. Assemble anti-backup spring (6), dust cover (13) and anti-backup hub (12) (if required).

2. Assemble brake spring (5) and clutch spring (4) on sleeve (9) (output tangs - clutch, brake - in the sleeve).

3. Assemble control collar (3) over clutch spring (4), by extending control tang of the clutch spring by using long
nose pliers (put pliers into collar (3) first).

4. The control tang of the brake spring (5) is located in one of the nine slots of the control collar. The control

tang of the clutch spring (4) - slightly precharged -lies in one of the ten slots.

5. Rotate output into STOP position. Assemble input hub (2) (not secured).

6. Differential setting of clucth/brake (overtravel OT). Actuator is in contact with stop of control collar (3)

Rotate output into STOP position. Pull backwards input hub (2), remove control tang of clutch spring (4) out

of slot of control collar. Open clutch spring (4), to obtain distance OT. Push spring and input hub (2) back
again. Lift actuator, the control collar (3) should overtravel distance OT. If OT is not reached. put control

tang of brake spring(5) in another of the nine slots and repeat procedure until OT is reached.

7. Assemble circlip (1) at input hub (2).

8. If anti-overrun is required : rotate output into STOP position. Remove circlip (1) and input hub (2). Screw

carefully anti-overrun spring (7) into output hub. Assemble input hub (2) by rotating in the drive direction.

Assemble circlip (1).

9. Check actuator setting (11).

Warner Electric Europe • [phone] P-2026-WE • 11/12 3