Atlas Copco PHE 26 RA - User Manual

This document provides repair instructions for the Atlas Copco PHE 26 RA, a power tool designed for drilling and hammering applications. The manual, identified as Repair Instruction No. 174.3/95, details the dismantling, maintenance, and assembly procedures for the device, emphasizing the importance of adhering to specific steps and using designated service tools.

Function Description:

The Atlas Copco PHE 26 RA is a robust power tool primarily used for drilling and hammer drilling tasks. Its design incorporates a SDS-Plus reception system, allowing for quick and secure bit changes. The tool features a gear housing that facilitates different operational modes, likely including rotation-only and hammer-with-rotation for various drilling needs. The presence of a "gear lever" and "hammer position" suggests a mechanism for selecting between these modes. The internal components, such as the armature, field, planetary gear, and back gear shaft, work in conjunction to deliver power and rotational force to the SDS-Plus reception. The extraction housing and turbine wheel indicate a dust extraction capability, enhancing user safety and maintaining a cleaner work environment.

Important Technical Specifications:

While specific power ratings (e.g., wattage, RPM, BPM) are not explicitly listed in the provided pages, the detailed repair instructions for components like the armature, field, and various gears imply a powerful motor and a robust transmission system. The mention of "high voltage check according to VDE" indicates that the tool operates on a standard electrical supply, likely 230V given the maintenance set part number (4931 3432 24 (230 V)). Torque specifications for assembly are provided: Spindle sleeve screws at 6.0 Nm, Joining gear housing/motor housing at 2.5+5 Nm, and End shield screws at 4.0 Nm. The precise measurement of 0.05 mm for the distance between the gear wheel and tumble drive during assembly highlights the critical tolerances involved in the tool's construction.

Usage Features:

The SDS-Plus reception is a key usage feature, allowing for quick and tool-free changes of drill bits and chisels. The "gear lever" suggests easy switching between different operating modes, adapting the tool to various tasks. The presence of a "Softgrip" handle (mentioned in the dismantling of the handle section) indicates an ergonomic design aimed at improving user comfort and reducing fatigue during prolonged operation. The integrated dust extraction housing, with its turbine wheel and aspiration hole, is a significant feature for maintaining a clean workspace and potentially reducing exposure to harmful dust particles. The tool's robust construction, evident from the detailed assembly and dismantling steps, suggests durability for professional use.

Maintenance Features:

The manual itself is a comprehensive guide to maintenance, emphasizing regular servicing to ensure optimal performance and longevity. Key maintenance features include:

• Regular Maintenance Recommendation: It is recommended to regularly submit the tool for maintenance, especially if carbon brushes are cut off or the hammer mechanism fails.
• Maintenance Set: A specific maintenance set (PHE 26 RA 4931 3432 24 (230 V)) is provided, ensuring that all necessary replacement parts are available for a complete overhaul.
• Cleaning: All parts, with the exception of electrical components, must be cleaned with cold cleaner. Electrical parts should be cleaned with a dry brush, with a strict warning against allowing cleaner to enter encapsulated bearings.
• Abrasion Test: A visual check for abrasion on dismantled parts is required, with instructions to exchange worn components.
• Lubrication Chart: A detailed lubrication chart specifies the type and amount of grease (Darina, Tivela) for each component, ensuring proper lubrication after dismantling and before assembly. This includes specific quantities for spindle wheel toothing (5g Darina), hollow of back gear (14g Darina), toothing of back gear (8g Tivela), O-rings (1g Darina), needle bearings (1g Darina each), and many other internal parts. The service set includes tubes of both Tivela and Darina grease.
• Electrical Test: Before and after assembly, all relevant parts must undergo an electrical test, including a high-voltage check, to ensure electrical safety and functionality.
• Screw Locking Device: All screwed connections in metal parts must be secured with a screw locking device during assembly, highlighting attention to detail and preventing loosening during operation.
• Component-Specific Instructions: The manual provides highly detailed, step-by-step instructions for dismantling and assembling each major component (SDS-Plus reception, gear housing, spindle, striker, back gear shaft, handle, electrical parts, extraction housing, armature, field, end shield), ensuring that technicians can perform repairs accurately.
• Date-Specific Instructions: The manual notes that some procedures and part numbers depend on the date of manufacture (e.g., for removing the inner locking ring, special pliers, and mounting rolls), which is crucial for correct servicing of different tool versions.
• Visual Checks: Instructions frequently include "Visual check!" to ensure proper engagement of parts and correct assembly.
• Cable Management: During assembly of electrical parts, it is explicitly stated to "Make sure the cables fit properly in the housing. Cables must never be jammed when assembling," preventing damage to wiring.