GFA-HIT

Geared Front Attachment

Product Information

General Information

WARNING

Risk of Property Damage or Severe Injury

Ensure that you read, understand and follow all instructions before operating the tool. Failure to follow all the instructions may result in electric shock, fire, property damage and/or severe bodily injury.

  • Read all Safety Information delivered together with the different parts of the system.

  • Read all Product Instructions for installation, operation and maintenance of the different parts of the system.

  • Read all locally legislated safety regulations regarding the system and parts thereof.

  • Save all Safety Information and instructions for future reference.

In this Section

Safety Signal Words

The safety signal words Danger, Warning, Caution, and Notice have the following meanings:

DANGER

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

CAUTION, used with the safety alert symbol, indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE

NOTICE is used to address practices not related to personal injury.

Country of Origin

For the Country of Origin, please refer to the information on the product label.

Overview

System Description

The Inline Gear Front Attachment (GFA) system is used for Hold and Drive (HAD) tightening and loosening of screws. that is, a system that holds the screw so that it does not spin while tightening a nut on the screw. The system can be used for screw connections in locations that are difficult to access.

The tightening operation is controlled by a separate drive unit to which the system is fitted. The drive unit can be of either pneumatic or electric type.

The modular structure of the system allows for a wide range of configurations available for different screw connections and tightening processes.

System Components

The modular GFA system is made up of the following main components:

GFA System Components

Position

Component

Function

A

Adapter

With an adapter the GFA system can be fitted to different interfaces. The interface varies depending on the drive unit model.

B

Gear Front Attachment (GFA) module

The GFA module comprises a housing which contains a number of gears in order to keep the central axis fixed.

C

Hold and Drive
Socket System

With a hold and drive socket the screw is kept fixed with a bit, while the nut is being tightened.

GFA performance

For maximum recommended torque see SI.

Accuracy 3σ: 6%.

Never exceed the recommended maximum torque.

The estimated product life of the HIT is 250,000 tightenings.

The socket will be subject to wear and is therefore considered as a consumable product.

Installation

Installation Instructions

Assembling the GFA Module

Dismantling the GFA Module

Assembling the GFA System on the Pistol Tool

Preparations

If the ring and locking parts are assembled on the tool, please follow the actions below.

  1. Hold the drive unit in position with a C-spanner securing the gear housing of the tool. Loosen and remove the ring with another C-spanner, in the clockwise direction.

  2. Unlock and remove the locking parts from the drive unit with a small screwdriver.

Assembling the GFA module on the Pistol Tool

  1. Hold the drive unit in position with a C-spanner securing the gear housing of the tool. Clean the threads of the drive unit and the threads of the bottom part of the adapter.

  2. Apply Loctite 2701, or similar, to the threads of the drive unit.

  3. Tighten the adapter with a C-spanner, in the counterclockwise direction, to 30 Nm.

  4. Hold the adapter in position with a C-spanner. Clean the threads of the top part of the adapter, and the threads of the cap nut of the GFA module.

  5. Apply Loctite 243, or similar, to the threads of the top part of the adapter.

  6. Tighten the cap nut of the GFA module with a C-spanner, in the clockwise direction, to 10 Nm.

Dismantling the GFA System on the Pistol Tool

  1. Hold the adapter of the GFA system in position with a C-spanner. Loosen the cap nut of the GFA module with another C-spanner, in the counterclockwise direction.

  2. Remove the GFA module from the adapter.

  3. Hold the drive unit in position with a C-spanner securing the gear housing of the tool. Loosen the adapter with another C-spanner, in the clockwise direction.

  4. Remove the adapter from the drive unit.

Assembling XB-P Adapter Instructions

Preparation

  1. For the HIT assembly, remove the existing bit holder and the nose nut from the XB-P tool.

Attaching a XB-P Adapter

  1. Fit the rotation locking ring to the XB-P housing. Slide the four internal fins into the corresponding grooves in the housing.

  2. Tighten the nose nut to the XB-P housing using the following procedure:

    • Tighten to 20 Nm (counterclockwise) using a pin spanner.

      Use the assembly tool 4080 1471 80 to tighten the nose nut.

    • Wait a minimum of 10 minutes (without loosening the initial applied torque).

    • Retighten to 20 Nm (counterclockwise) using a pin spanner.

    • The two-step tightening process is important because the plastic housing may relax after the first tightening.

    • When tightening, secure the rotation locking ring with a C-spanner.

  3. Tighten the adapter part to the rotation locking ring:

    • Apply Loctite 243 to the threads.

    • Tighten to 20 Nm in a counterclockwise direction.

    When tightening, secure the rotation locking ring with a C-spanner.

  4. Engage the splines between the adapter part and the HIT. Ensure that the shaft connects properly. Then tighten using the following procedure:

    • Apply Loctite 243 to the threads.

    • Tighten to 10 Nm in a clockwise direction.

    When tightening, secure the adapter part with a C-spanner.

Removing a XB-P Adapter

  1. To remove the adapter from the XB-P tool, follow the assembly steps in reverse order.

    For HIT assembly and disassembly, the bit holder is not required.

Functional Test

The functional test is done on the GFA module disconnected from the tool.

Perform a functional test before the first tightening operation, and after any performed maintenance activities.

To perform a functional test:

  1. Turn the output gear wheel by hand. It should be turned easily.

  2. If it is hard to turn, open the housing and check that all components are in the correct position. If issues persist, contact Atlas Copco Customer Center.

  3. Lubricate the system and assemble.

Relevant Information

Operation

Ergonomic Guidelines

Consider your workstation as you read through this list of general ergonomic guidelines to identify areas for improvement in posture, component placement, or work environment.

  • Take frequent breaks and change work positions frequently.

  • Adapt the workstation area to your needs and the work task.

    • Adjust for a convenient reach range by determining where parts and tools need to be located to avoid static load.

    • Use workstation equipment such as tables and chairs appropriate for the work task.

  • Avoid work positions above shoulder level or with static holding during assembly operations.

    • When working above shoulder level, reduce the load on the static muscles by lowering the weight of the tool, using for example torque arms, hose reels or weight balancers. You can also reduce the load on the static muscles by holding the tool close to the body.

    • Take frequent breaks.

    • Avoid extreme arm or wrist postures, particularly during operations requiring a degree of force.

  • Adjust for a convenient field of vision that requires minimal eye and head movements.

  • Use appropriate lighting for the work task.

  • Select the appropriate tool for the work task.

  • In noisy environments, use ear protection equipment.

  • Use high-quality inserted tools and consumables to minimize exposure to excessive levels of vibration.

  • Minimize exposure to reaction forces.

    • When cutting:

      A cut-off wheel can get stuck if the cut-off wheel is bent or not guided properly. Use the correct flange for the cut-off wheel and avoid bending the cut-off wheel during operation.

    • When drilling:

      The drill might stall when the drill bit breaks through. Use support handles if the stall torque is high. The safety standard ISO11148 part 3 recommends using a device to absorb a reaction torque above 10 Nm for pistol grip tools and 4 Nm for straight tools.

    • When using direct-driven screwdrivers or nutrunners:

      Reaction forces depend on the tool settings and joint characteristics. Strength and posture determine the amount of reaction force that an operator can tolerate. Adapt the torque setting to the operator's strength and posture and use a torque arm or reaction bar if the torque is too high.

  • In dusty environments, use a dust extraction system or wear a mouth protection mask.

Operating Instructions

Operating the GFA System

WARNING

Risk of Injury

If the system moves around unexpectedly, or if reactive forces are absorbed incorrectly, it can lead to severe injuries and property damage.

  • Always check that the system is placed correctly on the head of the nut.

WARNING

Crushing Hazard

The Dual trigger forces the user to use both hands to operate the tool. If not used, the operator can accidentally start the tool while adjusting the crowfoot, thus resulting in a serious hand injury.

  • Make sure the tool cannot be started once the Dual trigger has been released.

  • Always test the tool by first releasing the trigger of the Dual trigger, then push the trigger of the tool. If the tool starts; stop working.

Service

Service Overview

The HIT system is designed to last without need for maintenance of internal parts or greasing.

In this Section

Service Instructions and Intervals

Daily service

  1. Clean the exterior of the GFA.

  2. Inspect the GFA for any damage.

  3. Check all fastenings of the GFA.

  4. Run functional tests and listen for any abnormal noise.

Maintenance Instructions

Changing a HAD socket bit

Remove HAD Socket Bit

  1. Remove the two T8 screws.

  2. Remove the socket from the inline front part.

  3. Remove the bit from the bit holder.

Insert HAD Socket Bit

  1. Place the bit in the bit holder and secure it with a set screw.

  2. Place the socket on the inline front part.

  3. Tighten the two T8 screws. Make sure that the screws enter the holes on the output shaft of the inline front part.

Cleaning the System

To clean the system, wipe carefully with a clean, smooth cloth.

Recycling

Environmental Regulations

When a product has served its purpose it has to be recycled properly. Dismantle the product and recycle the components in accordance with local legislation.

Batteries shall be taken care of by your national battery recovery organization.

Recycling Information

Part

Recycle as

1-5, 7, 9-11

Steel

6, 8

Aluminium