Nexen Air Champ B275 Bedienungsanleitung

B275 Clutch

Sheave, Pilot and Coupling Mount

FORMNO.L-21026-D-0105

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

FORM NO. L-21026-D-0105

In accordance with Nexen’s established policy of constant product improvement, the specifications contained in this

manual are subject to change without notice. Technical data listed in this manual are based on the latest information

available at the time of printing and are also subject to change without notice.

Technical Support: 800-843-7445

(651) 484-5900

www.nexengroup.com

Nexen Group, Inc.

560 Oak Grove Parkway

Vadnais Heights, Minnesota 55127

ISO 9001 Certified

Read this manual carefully before installation and operation.

Follow Nexen's instructions and integrate this unit into your system with care.

This unit should be installed, operated and maintained by qualified personnel ONLY.

Improper installation can damage your system or cause injury or death.

Comply with all applicable codes.

DANGER

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

3FORM NO. L-21026-D-0105

Table of Contents

Installation-----------------------------------------------------------------------------------------------------------------------------4

Specifications------------------------------------------------------------------------------------------------------------------------4

Accessories --------------------------------------------------------------------------------------------------------------------------4

Installation-----------------------------------------------------------------------------------------------------------------------------5

AirLine Connections --------------------------------------------------------------------------------------------------------------6

AirPreparation-----------------------------------------------------------------------------------------------------------------------6

ClutchAssembly --------------------------------------------------------------------------------------------------------------------8

Troubleshooting-------------------------------------------------------------------------------------------------------------------10

Replacement Parts List---------------------------------------------------------------------------------------------------------11

Warranty -----------------------------------------------------------------------------------------------------------------------------12

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

FORM NO. L-21026-D-0105

INTRODUCTION

The B-275 Clutch is a member of Nexen's Air Champ®family. It is a pneumatically actuated clutch that is easy to

install and service. Although the B-275 Clutch is best suited for power transmission applications, it can also be used for

motion control and tension control applications. The tapped holes on the pilot mount makes it easy to mount in

applications that use sheaves, sprockets or gears.

The B-275 Clutch and Brake has a maximum torque of 100 in-lbs at 80 psi. The B-275 Clutch and Brake has a

maximum thermal horsepower rating of 0.05 at 1800 rpm. The B-275 Clutch and Brake can operate at speeds up to

3600 rpm.

SPECIFICATIONS

Product Number Bore Size Mounting Configuration Friction Facing Type

802870 0.625 inch [15.88 mm] Pilot Standard

802871 0.500 inch [12.70 mm] Pilot Standard

802872 0.625 inch [0.625 mm] Sheave, 1 "A" 3.0 inch PD Groove Standard

802873 0.625 inch [0.625 mm] Sheave, 1 "3V" 2.75 inch OD Groove Standard

ACCESSORIES

DESCRIPTION PROD. NO.

Repair Kit (all models).............................................................................................................................................................................................................802874

Brake Adapter ......................................................................................................................................................................................................................... 801200

Coupling Adapter (.500 Bore)............................................................................................................................................................................................800300

Coupling Adapter (.500 Bore, Nickel Plated) ............................................................................................................................................................... 800307

Coupling Adapter (.625 Bore)............................................................................................................................................................................................800400

Coupling Adapter (.750 Bore)............................................................................................................................................................................................800500

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

5FORM NO. L-21026-D-0105

INSTALLATION

SHEAVE AND PILOT MOUNTING

NOTE: Refer to Figure 1.

1. Insert the Key (Item 21) into the keyway of the

mounting shaft.

2. Slide the B-275 Clutch onto the mounting shaft until

the Key (Item 21) is seated in the B-275 Clutch.

3. Insert and tighten the two Set Screws (Item 20).

COUPLING ADAPTER MOUNTING

NOTE: Refer to Figure 2.

1. Insert the Key (Item 21) into the keyway of the

mounting shaft.

2. Slide the Pilot Mount B-275 Clutch onto the

mounting shaft until the Key (Item 21) is seated in

the Pilot Mount B-275 Clutch.

3. Insert and tighten the two Set Screws (Item 20).

4. Insert the customer supplied key into the coupling

shaft.

5. Slide the Coupling Adapter onto the coupling shaft.

6. Using the Cap Screws provided with the Coupling

Adapter, secure the Coupling Adaptor to the Pilot

Mount B-275 Clutch.

7. Insert and tighten the Set Screws provided with the

CouplingAdapter.

BRAKE ADAPTER MOUNTING

NOTE: Refer to Figure 3.

1. Using the Cap Screws provided with the Brake

Adapter, secure the Brake Adapter to the Pilot Mount

B-275 Clutch.

2. Insert the Key (Item 21) into the keyway of the

mounting shaft.

3. Slide the Pilot Mount B-275 Clutch with the Brake

Adapter onto the mounting shaft and Key.

4. Align the notch in the Brake Adapter with a torque

pin or stop on the machine.

5. Insert and tighten the two Set Screws (Item 20).

FIGURE 1

Mounting

Shaft

B-275

Clutch

Set Screw

(Item 20)

Key

(Item 21)

Pilot Mount

B-275Clutch

Notchin

Brake Adapter

Cap Screws

Set Screw

(Item 20)

Key

(Item 21)

Mounting

Shaft

Brake

Adapter

FIGURE 3

Mounting

Shaft

Coupling

Shaft

Pilot Mount

B-275Clutch

Coupling

Adapter

Key

(Item 21)

Set Screw

(Item 20)

Cap Screw

Customer

Supplied

Key

Set Screw

FIGURE2

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

FORM NO. L-21026-D-0105

AIRLINE CONNECTIONS

Connect the Air Hose Assembly (Item 19) to the 1/8 NPT

female Air Inlet Fitting (Item 18) in the Air Chamber (Item

9).

NOTE:To relievebearingdragduringoperation, secure

the air hose to a support.

CAUTION

Use ONLY the supplied air hose assembly to connect the B-275 Clutch to the Air Chamber.

Do NOT use rigid pipe or tubing. Rigid pipe or tubing can cause the B-275 Clutch to fail.

FIGURE 4

AIRPREPARATION

LUBRICATED AIR

Nexen recommends one drop of oil for every 20 cubic feet of air.

NON-LUBRICATED AIR

Nexen recommends the use of filtered, lubricated air to avoid premature seal wear and extend the life of the seal.

However, because the seals are lubricated prior to product assembly, they can operate with clean, dry non-lubricated air,

when conditions do not allow the use of lubricated air. The preparation of the air is critical to the life of clutch-brake

seals. To prepare the air; filter the air to 5 microns or better. The dew point specification should be 40°F or lower.

LUBRICATOR DRIP RATE SETTINGS

NOTE:ThesettingslistedareforNexensuppliedlubricators.IfyouarenotusingaNexenlubricator,thencalibration

must replicate the following procedure.

Hose Assembly

(Item 19)

Air Fitting

(Item 18)

Air Chamber

(Item 9)

B-275

Clutch

1. Close and disconnect the air line from the unit.

2. Turn the Lubricator Adjustment Knob clockwise

three complete turns.

3. Open the air line.

4. When a drop of oil forms in the Lubricator Sight

Gage, close the air line to the unit.

5. Connect the air line to the unit.

6. Turn the Lubricator Adjustment Knob

counterclockwise until it is closed.

7. Turn the Lubricator Adjustment Knob clockwise one-

third turn.

8. Open the air line to the unit.

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

7FORM NO. L-21026-D-0105

CLUTCH ASSEMBLY

NOTE: Refer to Figures 5, 6, 7 and 8

1. Remove the Retaining Ring (item 2) from the pilot

end of the clutch.

2. Use a bearing puller tool to remove the Pilot Mount

Disc (item 15) and Ball Bearing (item 3) from the

Hub (item 1).

NOTE: A Sheave (Item 4-not shown) may be used

instead of the Pilot Mount Disc (item 15) when B-275

model #802872 or B-275 model #802873 is used.

3. Remove the Spring Retaining Washer (item 23)

and Wave Spring (item 5).

4. Fully support the Pilot Mount Disc (item 15) and

press the Ball Bearing (item 3) out of the Pilot

Mount Disc (item 15).

NOTE:Donotreusethisbearing. Theforcerequiredto

pressthe bearingoutofthePilotMountDiscdamages

the bearing.

5. Clean the bearing bore of the Pilot Mount Disc

(item 15) with fresh safety solvent, removing all old

Loctite®residue.

6. Apply an adequate amount of Loctite®680 to evenly

coat the outer race of the new Bearing (item 3).

7. Carefully align the outer race of the new Ball

Bearing (item 3) with the bore of the Pilot Mount

Disc (item 15).

8. Support the Pilot Mount Disc (item 15). Press the

new Ball Bearing (item 3) into the Pilot Mount Disc

by pressing on the outer race of the Ball Bearing.

NOTE: Use only a new bearing. Do not reuse the old

bearing. The force required to press the old bearing

out of the Pilot Mount Disc damages the bearing.

9. Slide the Friction Disc - Piston sub assembly from

the Hub (item 1).

10. Remove the O-ring Seal (item 10) from the Piston

(item 13).

11. Remove the O-ring Seal (item 11) from the Air

Chamber (item 9).

12. Fully support the Piston (item 13) and press the

Friction Disc Assembly (item 7) out of the Ball

Bearing (item 32).

FIGURE 5

(continued...) FIGURE 6

Friction Disc-Piston

Assembly

Hub Air Chamber

Retaining Ring

(Item 2)

Bearing

(Item 3)

Spring Retaining

Washer

(Item 23)

Pilot Mount

Disc

(Item 15)

Friction Disc-Piston

Assembly

Hub Air Chamber

Wave Spring

(Item 5)

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

FORM NO. L-21026-D-0105

13. Remove the Retaining Ring (item 28) from the

Piston (item 13).

14. Fully support the Piston (item 13) and press the Ball

Bearing (item 32) out of the Piston (item 13).

15. Clean the bearing bore of the Piston (item 13) with

fresh safety solvent, removing all old Loctite residue.

16. Apply an adequate amount of Loctite®680 to

evenly coat the outer race of the new Ball Bearing

(item 32).

17. Carefully align the outer race of the new Ball Bearing

(item 32) with the bore of the Piston (item 13).

18. Support the Piston (item 13). Press the new Ball

Bearing (item 32) into the Piston by pressing on the

outer race of the Bearing.

19. Install the Retaining Ring (item 28) in the Piston

(item 13).

20. Fully support the inner race of the Ball Bearing (item

32) and press the new Friction Disc (item 7) into the

Bearing bore.

21. Remove the Retaining Ring (item 2) from the Hub

(item 1) at the end where it meets the Air Chamber.

22. Fully Support the Air Chamber (item 9) and press the

Hub (item 1) out of the Air Chamber.

23. Remove the Retaining Ring (item 30) from the Air

Chamber (item 9).

24. Fully support the Air Chamber (item 9) and press the

Ball Bearing (item 8) out of the Air Chamber.

25. Clean bearing bore of the Air Chamber (item 9) with

fresh safety solvent, removing all old Loctite residue.

26. Apply an adequate amount of Loctite®680 to

evenly coat the outer race of the new Ball Bearing

(item 8).

27. Carefully align the outer race of the new Ball

Bearing (item 8) with the bore of the Air Chamber

(item 9).

28. Support the Air Chamber (item 9). Press the new

Ball Bearing (item 8) into the Air Chamber by

pressing on the outer race of the Bearing.

CLUTCH ASSEMBLY (continued...)

(continued...)

FIGURE 7

FIGURE 8

Friction Disc

Assembly

(Item 7)

Retaining

Ring

(Item 28)

Bearing

(Item 32)

Piston

(Item 13)

Seal

(Item 10)

Seal

(Item 11)

Air Chamber

(Item 9)

Hub

(Item 1)

O-Ring

Seal

(Item 11)

Air Chamber

(Item 9)

Bearing

(Item 8)

Retaining Ring (Int)

(Item 30)

Retaining Ring (Ext)

(Item 2)

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

9FORM NO. L-21026-D-0105

29. Install the Retaining Ring (item 30) in the Air

Chamber (item 9).

30. Remove all old lubricant residue on the O-ring

contact surfaces of the Air Chamber (item 9) and

Piston (item 13) with fresh safety solvent.

31. Coat the O-ring contact surfaces of the Air

Chamber (item 9) and Piston (item 13) with fresh O-

ring lubricant.

32. Coat the new O-ring Seals (items 10 and 11) with

fresh O-ring lubricant.

33. Install the O-ring Seal (item 10) into the Piston

(item 13). Install the O-ring Seal (item 11) into the

Air Chamber (item 9).

34. Fully support the inner race of the Ball Bearing (item

8) and press the Hub (item 1) into the Bearing-Air

Chamberassembly.

35. Install the Retaining Ring (item 2) into the Hub (item

1) at the end where it meets the Air Chamber.

36. Slide the Friction Disc-Piston assembly onto the

Hub (item 1). Press the Piston (item 13) into the Air

Chamber (item 9).

37. Slide a new Spring (item 5) and Spring Retaining

Washer (item 23) onto the hub.

38. Support the Hub (item 1) Press the Bearing-Pilot

Mount Disc assembly onto the Hub by pressing on

the inner race of the Ball Bearing (item 3).

39. Install the Retaining Ring (item 2) to the Hub (Item

1) at the end where it meets the Pilot.

CLUTCH ASSEMBLY (continued...)

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

FORM NO. L-21026-D-0105

TROUBLESHOOTING

Pilot

Mount Disc

FrictionDisc

Assembly

Piston Air

Filter Air

Chamber

Retaining

Ring

Bearing

Retaining

Ring

Retaining

Ring

Bearing

Retaining

Ring Bearing O-Ring

Seal

O-Ring

Seal

Spring

Retaining

Washer

Wave

Spring

Set Screw

Hub

Symptom Probable Cause Solution

Failure to engage

Air not getting to teh B-275 due

to a control valve malfunction

Check for a control vlave malfunction or low air

pressure nad replace the control valve if

necessary.

Air leaks around the O-ring Seals Replace the O-ring Seals.

Lack of lubrication on the Hub

spline or in the Air Chamber Lubricate the Hub spline with a thin film of Never

Seezﬁ or check the air line lubricator settings.

Failure to disengage

Unexhausted air due to control

valve malfunction Check for a control valve malfunction and

replace the control valve if necessary.

Lack of lubrication on the hub

spline or in the Air Chamber Lubricate the Hub spline with a thin film of Never

Seezﬁ or check the air line lubricator settings.

Broken Wave Spring Replace Wave Spring.

Loss of torque Air leaks around the O-ring Seals Replace the O-ring Seals.

Worn or contaminated Friction

Facings Replace the Friction Disc.

Excessive drag on the air line Defective Ball Bearings Replace Ball Bearings.

Air line not properly supported Position the air line against a suppoert that is

parallel to the centerline of the B-275.

DIST. AUTORIZADO

MEX (55) 53 63 23 31

QRO (442) 1 95 72 60

MTY (81) 83 54 10 18

[email protected]

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