EWM Brückengleichrichter MB 380/335-2 SI-S Full Wave Brake Rectifier

Engineer's Quick Brief

• Universal Compatibility: Engineered with a versatile manifold and multi-thread adapter set, ensuring seamless connection to the N2 charging ports of Soosan (SB series), Stanley (MB series), Furukawa, and other major hydraulic breaker brands.
• Restores Impact Kinetic Energy: Accurately measuring and refilling the backhead/accumulator nitrogen cushion is critical. Correct N2 pressure maximizes the piston's downward strike force and protects the hydraulic pump from destructive pressure spikes.
• Critical Safety Notice: USE ONLY PURE NITROGEN (N2) GAS. Never use compressed air or oxygen. The diesel effect caused by compressed air mixing with atomized hydraulic oil under extreme pressure can cause a catastrophic and lethal explosion.

SEO Introduction

The Nitrogen (N2) Gas Charging and Testing Kit is an indispensable maintenance tool for heavy equipment mechanics and excavator operators utilizing hydraulic breaker attachments. Specifically configured to service industry-leading brands like Soosan and Stanley MB series hammers, this kit allows technicians to safely check, relieve, or refill the nitrogen gas pressure in the breaker's backhead or accumulator. Nitrogen acts as a highly compressible gas spring; when the hydraulic oil lifts the piston, it compresses the nitrogen. The subsequent expansion of this gas drives the piston downward with massive kinetic energy. Operating a breaker with depleted nitrogen results in weak impact power and severe hydraulic pulsation that can destroy the carrier machine's hydraulic pumps. Featuring a precision, shock-resistant pressure gauge, a heavy-duty bleeder valve, and high-pressure hoses, this kit ensures your demolition equipment is charged to precise OEM specifications.

Technical Specifications

Application Matrix

• Quarrying & Mining Operations: Daily or weekly verification of breaker accumulator pressures to ensure maximum rock-breaking efficiency and minimize excavator downtime.
• Construction & Demolition: Allows field mechanics to quickly recharge a hammer that has lost impact power due to gradual N2 seepage past the piston seals.
• Heavy Equipment Rental Fleets: An essential diagnostic tool for fleet managers to inspect returning attachments and prepare them for the next rental contract according to factory specifications.

Koeed B2B Tool: Hydraulic Breaker N2 Pressure Converter

Hydraulic breaker service manuals often use different pressure units depending on their region of origin (e.g., Soosan uses kg/cm², Stanley uses PSI, European brands use Bar). Use this specialized converter to instantly translate your OEM manual's target pressure into the units displayed on your charging kit's gauge.

Troubleshooting & FAQ

• Why has my hydraulic breaker lost its impact power and speed? The most common cause of sudden or gradual loss of impact power is low nitrogen gas pressure in the backhead. If the N2 leaks out past worn seals, the "gas spring" effect is lost. You must use the charging kit to check the static pressure and recharge it to the manual's specification.
• What happens if I overcharge the breaker with too much Nitrogen? Overcharging the backhead is just as detrimental as undercharging. If the N2 pressure is too high, the hydraulic oil pressure from the excavator will not be strong enough to lift the piston against the gas. The breaker will completely lock up and fail to strike, or it may blow out the internal main seals. Always use the bleed valve on the charging manifold to slowly release excess gas if overcharged.
• Can I use an air compressor to charge the breaker if I run out of Nitrogen? ABSOLUTELY NOT. This is a fatal mistake. Hydraulic breakers generate extreme heat and pressure. Compressing oxygen (found in normal air) in the presence of hydraulic oil vapors creates a highly explosive mixture. This "diesel effect" will cause the breaker to explode, potentially causing lethal shrapnel injuries. Use 100% pure Nitrogen only.
• How often should I check the Nitrogen pressure using this kit? It is highly recommended to check the N2 pressure every 100 to 250 operating hours, before the start of a major demolition project, or immediately if the operator notices increased vibration in the excavator cab or a drop in rock-breaking performance.

Cross-Reference Guide

• Attachment Compatibility: The multi-adapter design ensures fitment not only for Soosan (SB40, SB50, SB81, etc.) and Stanley (MB156, MB256, etc.), but also serves as a reliable maintenance kit for MSB, Daemo, Toku, and Rammer breakers.
• Adapter Thread Matching: Always visually verify and hand-thread the adapter into the breaker's charging valve before applying wrench torque. Cross-threading a high-pressure N2 valve will permanently damage the breaker's backhead housing.