Generator Brush Set, 6 Volt, For Aircooled VW

OVERVIEW

When you are piloting a vintage 6-volt Volkswagen, your charging system is the lifeblood of your electrical reliability. Over time, the carbon brushes inside your generator naturally wear down due to constant friction against the spinning commutator. This wear leads to a gradual decrease in charging efficiency, often manifesting as dimming headlights, a flickering generator warning light on the dashboard, or a battery that simply won''t hold a charge after a long drive. Our premium Generator Brush Set for 6-volt air-cooled engines is designed to restore that critical electrical contact, ensuring your Bosch GR11 generator or equivalent aftermarket unit provides the consistent amperage needed to keep your classic Beetle, Bus, or Karmann Ghia running exactly as it did when it left the factory in Wolfsburg.

At Appletree Auto, we know that maintaining a 6-volt system requires attention to detail, and these brushes are a fundamental component of any tune-up or electrical overhaul. Manufactured from high-grade carbon-graphite compounds, these brushes offer the perfect balance of conductivity and durability, minimizing wear on the generator''s internal armature while maximizing current flow. Whether you are performing a total generator rebuild or just conducting preventative maintenance before a long summer road trip, replacing your worn brushes with this set (Part Number 111-903-515A) is one of the most cost-effective ways to ensure your vintage VW doesn''t leave you stranded with a dead battery. Don''t wait until the red light stays on permanently; keep your charging system robust and reliable with these high-quality replacement brushes.

FITMENT

This 6-volt generator brush set is designed for use with the GR11 style generators found on early air-cooled Volkswagen models. Please verify your generator voltage and model before ordering.

• Volkswagen Type 1 Beetle: 1946 through 1966 (6-Volt Models)
• Volkswagen Type 2 Bus / Transporter: 1950 through 1966 (6-Volt Models)
• Volkswagen Karmann Ghia: 1956 through 1966 (6-Volt Models)
• Volkswagen Type 3 (Squareback, Fastback, Notchback): 1961 through 1966 (6-Volt Models)
• Custom Dune Buggies and Sand Rails: Any build utilizing a vintage 6-volt VW generator system.

SPECS

Each set is manufactured to meet or exceed original equipment specifications for fitment and electrical performance.

• Part Number: 111-903-515A (111903515A)
• Voltage Compatibility: 6 Volt DC Systems
• Quantity: Sold as a set of 2 brushes (completes one generator)
• Material: High-conductivity Carbon Graphite compound
• Connection Type: Integrated copper lead wires for secure terminal attachment
• Generator Series: Compatible with Bosch GR11 and similar 6V charging units
• Wear Indicator: Standard block design for easy visual inspection

PRO TIPS

Tip 1: Clean the Commutator Surface

Before installing your new brushes, it is absolutely vital to inspect the commutatorthe copper segments on the generator armature that the brushes ride on. If the commutator is covered in carbon dust, oil, or looks blackened, your new brushes will wear out prematurely or arc. Use a specialized commutator stone or very fine 400-600 grit sandpaper to lightly clean the copper until it shines. Never use emery cloth, as the particles are conductive and can short out the segments of your armature, leading to a total generator failure.

Tip 2: Check Your Brush Spring Tension

New brushes are only as good as the springs that hold them against the armature. While you have the generator open or the inspection covers off, check the tension of the brush holder springs. If the springs feel weak or have been overheated and lost their "snap," they won''t provide enough downward pressure to maintain a solid electrical connection. This lack of pressure causes "brush bounce," which leads to sparking and can burn the face of your brand-new brushes in a matter of minutes. Ensure the springs are seated squarely in the center of the brush for even wear.

Tip 3: The Proper "Seating" Procedure

To get the longest life out of your new 6-volt generator brushes, they need to be properly seated to the contour of the commutator. After installation, you can manually "seat" them by placing a small strip of fine sandpaper between the brush and the commutator (grit side facing the brush) and pulling the paper back and forth. This creates a curved profile on the brush face that matches the armature perfectly. If you don''t seat them manually, avoid high-RPM driving for the first 20-30 miles to allow the brushes to naturally wear into their seats without excessive arcing or heat buildup.