Nexen AIR CHAMP FWCB User Manual
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Nexen AIR CHAMP FWCB User Manual

Pilot, coupling, and sheave mount clutch-brake
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PILOT, COUPLING, AND SHEAVE MOUNT CLUTCH-BRAKE
MODELS FWCB, LWCB, MWCB, AND HWCB
1
FORM NO. L-20016-Z-0415

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Summary of Contents for Nexen AIR CHAMP FWCB

  • Page 1 PILOT, COUPLING, AND SHEAVE MOUNT CLUTCH-BRAKE MODELS FWCB, LWCB, MWCB, AND HWCB FORM NO. L-20016-Z-0415...
  • Page 2 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.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS General Specifications -------------------------------------------------------------------------------------------------------------------------- 4 General Safety Precautions ------------------------------------------------------------------------------------------------------------------- 4 Installation ------------------------------------------------------------------------------------------------------------------------------------------- 5 Lubrication ------------------------------------------------------------------------------------------------------------------------------------------- 7 Air Connections ----------------------------------------------------------------------------------------------------------------------------------- 8 Operation -------------------------------------------------------------------------------------------------------------------------------------------- 9 Troubleshooting ---------------------------------------------------------------------------------------------------------------------------------- 10 Disassembly-Pilot, Coupling, and Sheave Mount ----------------------------------------------------------------------------------- 11 Parts Replacement-Pilot, Coupling, and Sheave Mount -------------------------------------------------------------------------- 13 Reassembly--Pilot, Coupling, and Sheave Mount ----------------------------------------------------------------------------------- 18 Replacement Parts ----------------------------------------------------------------------------------------------------------------------------- 21 Warranty -------------------------------------------------------------------------------------------------------------------------------------------- 29...

  • Page 4: General Specifications

    WARNING WARNING Ensure proper guarding of the product is This product is capable of emitting used. Nexen recommends the machine a spark if misused therefore is not builder design guarding in compliance recommended for use in any explosive with OSHA 29 CFR 1910 “Occupational environment.

  • Page 5: Installation

    INSTALLATION PILOT MOUNT CLUTCH-BRAKE Refer to Figure 1. Sheave Shaft Clutch-Brake NOTE Sprocket These are "hub-stop" clutch-brakes. They stop the shaft on which they are mounted. Therefore, they must be mounted on (Item 30) the driven shaft. Secure a customer supplied sheave or sprocket to the Clutch- (Item 30) Brake.
  • Page 6 INSTALLATION (continued) COUPLING MOUNT CLUTCH-BRAKE Refer to Figure 2. Clutch-Brake Driven Determine the parallel misalignment of shafts to be coupled Shaft by placing a straight edge across the shafts and measuring the maximum offset at various points around the periphery of the shafts.

  • Page 7: Lubrication

    NOTE Nexen pneumatically actuated devices require clean, pressure regulated air for maximum performance and life. All seals in Nexen pneumatically operated devices are lubricated for life, and do not require additional lubrication. However, some customers prefer to use an air line lubricator, which injects oil into the pressurized air, forcing an oil mist into the air chamber.

  • Page 8: Air Connections

    NOTE product life. For quick response, Nexen recommends a quick exhaust valve and short air lines between the Control Valves and the product. Align the air inlet ports to a down position to allow condensation to drain out of the air chambers of Air Pressure (Gage) Limits the product.

  • Page 9: Operation

    Expected life (in hrs) can be found by: Ensure proper guarding of the product is Time=Volume/(Power*Wear Rate). used. Nexen recommends the machine builder design guarding in compliance with OSHA 29 CFR 1910 “Occupational Safety and Health Hazards”.

  • Page 10: Troubleshooting

    TROUBLESHOOTING PROBLEM PROBABLE CAUSE SOLUTION Air not getting to clutch-brake due to a control Check for control valve malfunction and replace valve malfunction. valve if necessary. Failure to engage. Air leaks. Replace air lines. Lack of lubrication on the hub spline or in the Lubricate hub spline and/or air chamber.

  • Page 11: Disassembly-Pilot, Coupling, And Sheave Mount

    DISASSEMBLY—PILOT, COUPLING, AND SHEAVE MOUNT NOTE The following sections are arranged by model. Verify that you are in the correct section for your model. FWCB Refer to Figures 5 - 8. Loosen the Set Screw (Item 47) and remove the Hub Collar (Item 46) from the Clutch-Brake.
  • Page 12 DISASSEMBLY—PILOT, COUPLING, AND SHEAVE MOUNT (continued) LWCB AND MWCB Refer to Figures 9 & 10. (Item 1) Loosen the Set Screws (Items 28 and 29); then, remove the Locking Nut (Item 26) and the Brake Friction Disc (Item 2). Remove the Spacer (Item 16). Press the Brake Assembly off the Hub (Item 1).

  • Page 13: Parts Replacement-Pilot, Coupling, And Sheave Mount

    PARTS REPLACEMENT—PILOT, COUPLING, AND SHEAVE MOUNT NOTE The following sections are arranged by model. Verify that you are in the correct section for your model. FWCB CAUTION Working with spring loaded or tension loaded fasteners and devices can cause injury. Wear safety glasses and take the appropriate safety precautions.
  • Page 14 PARTS REPLACEMENT—PILOT, COUPLING, AND SHEAVE MOUNT (continued) 10. Fully support the Air Chamber (Item 8) and press the Clutch Friction Disc (Item 9) out of the Air Chamber. NOTE If the Ball Bearing (Item 14) comes out of the Air Chamber (Item 8), use a bearing puller to remove it from the Clutch Friction Disc (Item 9).
  • Page 15 PARTS REPLACEMENT—PILOT, COUPLING, AND SHEAVE MOUNT (continued) LWCB AND MWCB 24/25 Refer to Figures 17 - 20. CAUTION Working with spring loaded or tension loaded fasteners and devices can cause injury. Wear safety glasses and take the appropriate safety precautions. Remove the Retaining Ring (Item 41) from the Sheave (Item 12) or Pilot Drive Disc (Item 33).
  • Page 16 PARTS REPLACEMENT—PILOT, COUPLING, AND SHEAVE MOUNT (continued) NOTE If the Ball Bearing (Item 14) comes out of the Air Chamber (Item 8), use a bearing puller to remove it from the Clutch Friction Disc (Item 9). If the Ball Bearing remains in the Air Chamber (Item 8), use a die remover to remove it from the Air Chamber.
  • Page 17 PARTS REPLACEMENT—PILOT, COUPLING, AND SHEAVE MOUNT (continued) HWCB CAUTION Working with spring loaded or tension loaded fasteners and devices can cause injury. Wear safety glasses and take the appropriate safety precautions. Refer to Figures 21 - 24. Remove the Retaining Ring (Item 41) from the Sheave (Item 12) or Pilot Drive Disc (Item 33).

  • Page 18: Reassembly-Pilot, Coupling, And Sheave Mount

    PARTS REPLACEMENT—PILOT, COUPLING, AND SHEAVE MOUNT (continued) 15. Remove the old Flat Head Machine Screws (Item 24) and Friction Facing (Item 4) from the Piston (Item 3). CAUTION Working with spring loaded or tension loaded fasteners and devices can cause injury.
  • Page 19 REASSEMBLY—PILOT, COUPLING, AND SHEAVE MOUNT (continued) Slide the Clutch Assembly onto the Hub (Item 1) and Key (Item 15). Clutch Align the Spring Pin (Item 23) located on the Brake Assembly Assembly with the hole in the Clutch Assembly and press the Clutch Assembly onto the Hub (Item 1).
  • Page 20 REASSEMBLY—PILOT, COUPLING, AND SHEAVE MOUNT (continued) HWCB Drive Disc Assembly Refer to Figures 31 & 32. Fully supporting the inner bearing race, press the Hub (Item 43) into the Sheave of Drive Disc Assembly. Slide the Compression Spring (Item 11) onto the Hub (Item Clutch 43);...

  • Page 21: Replacement Parts

    REPLACEMENT PARTS The item or balloon number for all Nexen products is used for part When ordering replacement parts, specify model designation, item identification on all product parts lists, product price lists, unit number, part description, and quantity. Purchase replacement assembly drawings, bills of materials, and instruction manuals.
  • Page 22 REPLACEMENT PARTS (continued) FWCB—PILOT AND COUPLING MOUNT FIGURE 34 ITEM DESCRIPTION ITEM DESCRIPTION O-Ring Seal Friction Disc Slotted Spring Pin Piston Flat Head Machine Screw Friction Facing Locking Nut Shoulder Bolt Set Screw Compression Spring Set Screw Piston Air Chamber Set Screw Air Chamber Friction Disc...
  • Page 23 REPLACEMENT PARTS (continued) LWCB—SHEAVE MOUNT FIGURE 35 ITEM DESCRIPTION ITEM DESCRIPTION Retaining Ring (Int.) O-Ring Seal Friction Disc Piston O-Ring Seal O-Ring Seal Friction Facing O-Ring Seal Shoulder Bolt O-Ring Seal Compression Spring Slotted Spring Pin Piston Air Chamber Air Chamber Flat Head Machine Screw Locking Nut Friction Disc...
  • Page 24 REPLACEMENT PARTS (continued) LWCB—PILOT AND COUPLING MOUNT FIGURE 36 ITEM DESCRIPTION ITEM DESCRIPTION O-Ring Seal O-Ring Seal Friction Disc O-Ring Seal Piston O-Ring Seal Friction Facing Slotted Spring Pin Shoulder Bolt Flat Head Machine Screw Compression Spring Locking Nut Piston Air Chamber Set Screw Air Chamber Set Screw...
  • Page 25 REPLACEMENT PARTS (continued) MWCB—SHEAVE MOUNT FIGURE 37 ITEM DESCRIPTION ITEM DESCRIPTION Retaining Ring (Int.) Friction Disc O-Ring Seal Piston O-Ring Seal Friction Facing O-Ring Seal Shoulder Bolt O-Ring Seal Compression Spring O-Ring Seal Piston Air Chamber Slotted Spring Pin Air Chamber Flat Head Machine Screw Friction Disc Flat Head Machine Screw...
  • Page 26 REPLACEMENT PARTS (continued) MWCB—PILOT AND COUPLING MOUNT FIGURE 38 ITEM DESCRIPTION ITEM DESCRIPTION O-Ring Seal Friction Disc O-Ring Seal Piston O-Ring Seal Friction Facing O-Ring Seal Shoulder Bolt Slotted Spring Pin Compression Spring Flat Head Machine Screw Piston Air Chamber Flat Head Machine Screw Air Chamber Locking Nut...
  • Page 27 REPLACEMENT PARTS (continued) HWCB—SHEAVE MOUNT FIGURE 39 ITEM DESCRIPTION ITEM DESCRIPTION Piston O-Ring Seal Friction Facing O-Ring Seal Shoulder Bolt O-Ring Seal Compression Spring O-Ring Seal Piston Air Chamber Slotted Spring Pin Air Chamber Flat Head Machine Screw Friction Disc Set Screw Friction Facing Set Screw...
  • Page 28 REPLACEMENT PARTS (continued) HWCB—PILOT AND COUPLING MOUNT FIGURE 40 ITEM DESCRIPTION ITEM DESCRIPTION Piston O-Ring Seal Friction Facing O-Ring Seal Shoulder Bolt O-Ring Seal Compression Spring Slotted Spring Pin Piston Air Chamber Flat Head Machine Screw Air Chamber Set Screw Friction Disc Set Screw Friction Facing...

  • Page 29: Warranty

    Warranties Nexen warrants that the Products will (a) be free from any defects in material or workmanship for a period of 12 months from the date of shipment, and (b) will meet and perform in accordance with the specifications in any engineering drawing specifically for the Product that is in Nexen’s current product catalogue, or that is accessible at the Nexen website, or that is...

This manual is also suitable for:

Air champ lwcbAir champ mwcbAir champ hwcb

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