Servicing the Reaction Arm and Square Drive on QX Series™ 40V Cordless Torque Multipliers

Authorized service personnel only

This article explains how to remove and reinstall the reaction arm and square drive on QX Series 40V cordless torque multipliers with the circlip-retained reaction arm and screw-retained square drive shown in the service video.

The video demonstrates the mechanical sequence on one gearbox configuration. Confirm the installed gearbox and square-drive arrangement before selecting tools, replacement parts, and retaining-screw specifications.

Safety Notice

Remove the battery before servicing the tool or changing accessories. Only authorized, trained personnel should perform this procedure.

Wear appropriate eye protection when removing or installing the circlip. Support the gearbox on a stable work surface and control the circlip as it is removed.

Before returning the tool to use, install and secure the correct reaction arm. Keep hands clear of the arm during operation and follow the reaction-bar safety instructions for positioning it against a suitable fixed reaction point.

Before You Begin

• Identify the configuration. Record the tool model and gearbox rating, and confirm the square-drive arrangement against the applicable parts information.
• Confirm the service specifications. Obtain the retaining-screw tightening instructions for that configuration before disassembly.
• Check for a special application. The 1000 Nm, 1-inch square-drive truck-lane arrangement has separate screw-setting, curing, and clearance requirements. Follow that specific instruction in the parts manual rather than applying the standard tightening method.
• Prepare the tool. Remove the battery and socket, and support the assembly securely.
• Check replacement compatibility. Use the parts information for the installed gearbox. For reaction-arm options and dimensions, see Reaction Arms and Extensions for QXM.

Tools & Materials

• Awl or suitable pick for lifting the leading end of the circlip, as demonstrated in the video
• Correct hex bit or key for the square-drive retaining screw
• Suitable torque wrench and bit
• Serviceable threadlocker specified for the configuration
• Compatible replacement components, as needed
• Applicable parts information and retaining-screw specifications

Service Video

The approximately two-minute video shows circlip removal, reaction-arm removal, square-drive removal and installation, and circlip reinstallation.

Use the video with the written procedure and current configuration-specific service specifications.

Procedure

1. Remove the Reaction Arm

1. Locate the circlip retaining the reaction arm on the gearbox.
2. Use an awl or suitable pick to lift the leading end of the circlip out of its groove.
3. Carefully unwind the circlip from the gearbox.
4. Slide the reaction arm off the external gearbox splines.

2. Remove the Square Drive

1. Locate the retaining screw in the center of the square drive.
2. Use the correct hex bit to remove the screw.
3. Slide the square drive out of the gearbox.

3. Check the Removed Components

Before reassembly, check the square drive, mating splines, retaining screw, reaction arm, circlip, and retaining groove for visible damage or wear.

If a component is damaged or its serviceability is uncertain, obtain the correct replacement or contact Ingersoll Rand service before continuing.

4. Reinstall the Square Drive

1. Align the square-drive splines with the mating splines inside the gearbox.
2. Slide the square drive into position.
3. Apply the specified serviceable threadlocker to the retaining screw.
4. Install the retaining screw using the correct hex bit.
5. Complete tightening or setting according to the instructions for that gearbox and drive arrangement. Observe any specified threadlocker cure time before returning the tool to service.

5. Reinstall the Reaction Arm

1. Slide the compatible reaction arm onto the external gearbox splines.
2. Place the leading end of the circlip into the retaining groove.
3. Wind the circlip around the gearbox while pressing it into the groove, as shown in the video.
4. Verify that the circlip is fully seated around the groove and retains the reaction arm.

Square Drive Retaining Screw Torque Spec

Expected Tool Behavior

After correct reassembly:

• The square drive is installed and retained according to the applicable instructions.
• The reaction arm engages the gearbox splines and is retained by the fully seated circlip.
• Any configuration-specific clearance and threadlocker curing requirements have been met.

Complete the applicable authorized-service checks before returning the tool to use.

When to Contact Service

Stop work and contact Ingersoll Rand service if:

• The correct gearbox or retaining-screw specification cannot be identified.
• The drive, splines, screw, reaction arm, circlip, or groove is damaged.
• The drive will not seat correctly or the circlip will not remain fully seated.
• Further gearbox disassembly or repair is required.

See Repair, Calibration and Warranty Services for QX Multiplier Tools for service arrangements. When sending a tool for repair or calibration, send the complete tool, including the multiplier attachment.