HM2500 Krupp Hammer Assembly Accumulator – Manufactured by MERIT
MERIT manufactures high-performance replacement accumulators engineered specifically for HM2500 hydraulic hammer assemblies. Designed as a direct-fit, OEM-equivalent solution, this unit ensures stable energy storage, optimized pressure regulation, and consistent удар performance under severe working conditions.
Our accumulators are produced from high-grade alloy steel, precision CNC-machined to maintain exact tolerances required for hydraulic efficiency and sealing integrity. Each unit undergoes controlled heat treatment to achieve superior fatigue resistance, ensuring long service life even under continuous high-frequency impact loads.
Key Technical Features:
• Precision-machined housing for perfect alignment with HM2500 assemblies
• High-strength alloy steel construction for maximum structural durability
• Engineered gas chamber volume for optimal shock absorption and energy return
• Advanced sealing system resistant to pressure fluctuation and thermal cycling
• Surface finishing designed to prevent micro-corrosion and extend operational life
• Fully tested for pressure stability, leakage control, and dimensional accuracy
MERIT accumulators are developed for demanding quarry, demolition, and mining environments where reliability directly affects productivity. Our manufacturing process focuses on repeatability, material traceability, and strict quality inspection to ensure consistent field performance.
With MERIT, customers receive a robust, technically refined alternative to original components—delivering durability, performance stability, and reduced downtime without compromising compatibility.
SAE 4340 is a high-strength, low-alloy steel widely used in critical load-bearing and high-impact industrial components. It belongs to the nickel–chromium–molybdenum alloy steel family and is specifically developed for applications requiring exceptional toughness, fatigue resistance, and deep hardenability.
This material provides an outstanding combination of strength and ductility after heat treatment, making it highly suitable for hydraulic breaker components subjected to cyclic loading, shock impact, and high internal pressures.
Typical Chemical Composition:
• Nickel (Ni): 1.65 – 2.00% → Improves toughness and impact resistance
• Chromium (Cr): 0.70 – 0.90% → Enhances hardenability and wear resistance
• Molybdenum (Mo): 0.20 – 0.30% → Increases strength at high stress levels and improves fatigue life
• Carbon (C): 0.38 – 0.43% → Provides the required hardness and mechanical strength
Key Mechanical Characteristics (After Quench & Temper Heat Treatment):
• High tensile strength with excellent core toughness
• Superior fatigue resistance under dynamic and cyclic loads
• Excellent resistance to crack propagation in high-shock environments
• Deep hardenability allowing uniform mechanical properties across thick sections
• Strong dimensional stability after heat treatment
• High resistance to impact, making it ideal for accumulator bodies and pressure-retaining parts
Manufacturing Advantages:
SAE 4340 responds exceptionally well to precision machining, controlled heat treatment, and surface finishing processes. Its metallurgical structure allows reliable performance under severe service conditions where both strength and fracture toughness are critical.
Application Relevance for Hydraulic Hammer Accumulators:
In accumulator systems, the material must withstand repeated pressure pulsations, vibration, and sudden load reversals. SAE 4340 ensures structural integrity, long fatigue life, and operational safety, preventing deformation or micro-fractures over extended service cycles.
This makes SAE 4340 one of the most trusted materials for heavy-duty mining, demolition, and hydraulic breaker components where failure is not an option.
| 3033099 | Moil point |
| 3034027 | Moil point |
| 3033891 | Flat chisel |
| 3034096 | Flat chisel |
| 3035667 | Blunt steel |
| 3034265 | Chisel stripper |
| 3067123 | Contilube instructions |
| 3067249 | Hammer box HM 2500 Marathon cpl. |
| 1356789 | Elastic pad |
| 1356925 | Shock absorber |
| 2269803 | Plate (PUR) |
| 2265215 | Plate (PUR) |
| 3033803 | Floating ring |
| 3033801 | Counter ring |
| 3033733 | Guide ring |
| 1854347 | Locking bolt |
| 1854363 | Locking bolt bush |
| 2261698 | Transport safety device |
| 1031739 | Hexagonal socket head screw |
| 0103255 | Hexagonal nut |
| 1853365 | Lock washer |
| 3066499 | Set of plastic parts 101 – 105 |
| 2267895 | Sealing plug |
| 2267899 | Sealing plug |
| 3031183 | Cover |
| 3032235 | Cover, left |
| 3068243 | Cover, right |
| 0433381 | Hexagonal socket head screw |
| 1850596 | Lock washer |
| 3031181 | Cover plate |
| 3068099 | Cover plate |
| Part Number | Part Name |
|---|---|
| 3066094 | Cylinder cover, cpl. |
| 3067159 | Zylinder, vist. |
| 1356613 | Percussion piston |
| 3035233 | Seal bushing cpl. |
| 3066196 | Lower hammer part, cpl. |
| 2262675 | Tensioning bolt |
| 1852373 | Plain washer |
| 1852841 | Nut |
| 2263505 | Tensioning bolt, cpl. |
| 3067157 | Cylinder cover cpl. |
| 0206700 | Lifting eye bolt |
| 1850102 | Pressure accumulator |
| 1851591 | Expansion bolt |
| 1851593 | Plain washer |
| 1844115 | Screw plug |
| 1844115 | Threaded plug |
| 1844113 | Perforated disk |
| 1855001 | Back-up ring |
| 0996719 | Filling valve cpl. |
| 2267589 | Seal ring |
| 2267585 | Seal ring |
| 1846268 | Slide ring seal |
| 1846278 | O-ring |
| 3034283 | Stripper |
| 1851287 | Buffer ring |
| 0175125 | O-ring |
| 0921413 | Dowel pin |
| 3033525 | Set of seals for grooved rings |
| 2267586 | Seal ring |
| 1329794 | Protective plug |
| 0314364 | O-ring |
| 0328046 | Back-up ring |
| 0314887 | O-ring |
| 1846267 | Slide ring seal |
| 1846278 | O-ring |
| 1846277 | Quadring seal |
| 1031810 | O-ring |
| 2262921 | Sealing plug |
| 2260433 | Locking bush |
| 2261540 | Locking pin |
| 3032077 | Wear bush |
| 3033729 | Wear bush |
| 1854363 | Locking bush |
| 1854347 | Locking pin |
| 1031529 | Threaded insert |
| 3067033 | Control slide valve |
| 1331555 | Control casing cover |
| 0103776 | Cylindrical bolt |
| 2269999 | Swivel joint, cpl. |
| 0103750 | Cylindrical bolt |
| 3035453 | AutoControl valve |
| 0314370 | O-ring |
| 3035425 | Threaded plug |
| 0314375 | O-ring |
| 2269861 | Flange body |
| 1356643 | Connecting piece |
| 1846282 | O-ring |
| 1846281 | Back-up ring |
| 1356645 | Washer |
| 0028200 | Locking ring |
| 1353489 | Screw cap |
| 1850422 | Set of seals for swivel |
| 0478426 | Screw plug |
| 3033079 | Seal bushing |
| 3034265 | Chisel stripper |
| 1329022 | Diaphragm cpl. |
| 3066096 | Set of seals, cpl. |
Disclaimer: Krupp® is a registered trademark of Krupp. Merit® Automotive is not affiliated with, sponsored by, or endorsed by Krupp®. References to Krupp® part numbers or models are for identification and compatibility purposes only.
