Maximize the service life of your Rammer 5011 hydraulic breaker with the Merit High-Performance Lower Tool Bushing. As a primary wear part for the 5-ton class 5011 series, the 171140 bushing is designed to be the sacrificial component that guides the 160 mm tool (chisel). By choosing Merit’s precision-engineered bushings, you ensure perfect alignment, protecting the striking piston from offset strikes and preventing expensive damage to the front head housing.
Product Specifications
| Feature | Details |
|---|---|
| Product Name | Lower Tool Bushing / Букса (Втулка) |
| Part Number | 171140 |
| Compatible Model | Rammer 5011 / 5011E / Sandvik BR5011 |
| Material | High-Alloy Wear-Resistant Steel |
| Hardness | Case Hardened (Surface 54-58 HRC) |
Export to Sheets
Why Choose the Merit 171140 Bushing for Rammer?
The Rammer 5011 is a high-duty breaker used in extreme quarrying. Standard bushings often wear unevenly, causing “tool wobble.” Merit components provide:
1. Advanced Metallurgical Strength
Our 171140 bushings are manufactured from high-grade alloy steel and subjected to a specialized induction hardening process. This creates an incredibly hard inner surface to resist the abrasive friction of the tool shank, while maintaining a tough outer structure to handle the lateral loads of heavy prying.
2. Optimized Grease Distribution
The Merit bushing features precision-machined internal lubrication grooves. These channels are engineered to work perfectly with the RAMLUBE automatic greasing system, ensuring that chisel paste reaches the highest friction zones to prevent heat-related seizing and “cold welding.”
3. Precise Dimensional Stability
Every bushing is machined to exact tolerances. This ensures a stable “press-fit” or “slip-fit” (depending on head design) into the Rammer 5011 front head, preventing the bushing from vibrating loose and protecting the internal bore of your hammer.
Maintenance Tip: The “10% Rule” for Bushing Wear
To protect your 171140 bushing and the breaker piston:
- Check the Clearance: For the Rammer 5011 (160 mm tool), if the gap between the tool and the bushing exceeds 7 mm to 9 mm, the bushing is worn out. Operating beyond this point causes the piston to strike the tool at an angle, leading to chipped pistons.
- Inspect the Retainers: When changing the bushing, always check the Retaining Pins (154674). Worn pins allow the tool to move excessively, which accelerates the wear on your new bushing.
- Grease Frequency: Ensure the tool shank is always visible with a layer of grease. If the tool looks “dry,” your lubrication system may be blocked or empty.
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