Secure your working tool and protect your front head with the Merit Heavy-Duty Tool Retaining Pin, a precision-engineered replacement for Rammer/Sandvik part number 173346. Designed specifically for the massive Rammer 9033 (and compatible Sandvik large-range breakers), these pins are responsible for holding the 190 mm – 215 mm diameter tools in place. Given the enormous weight and vibration of tools in this class, the 173346 must be exceptionally tough to prevent deformation and ensure easy tool changes.
Product Specifications
| Feature | Details |
|---|---|
| Product Name | Tool Retaining Pin / Палец инструмента |
| Part Number | 173346 |
| Compatible Model | Rammer 9033 / Sandvik BR9033 |
| Material | High-Alloy Wear-Resistant Steel |
| Processing | Through-Hardened & Impact-Resistant Core |
Why Choose the Merit 173346 Retaining Pin?
The Rammer 9033 is a 7-ton breaker. The stress placed on the retaining pins during a “blank fire” or heavy prying is extreme. Merit pins are built to handle the load:
1. Optimal Hardness Balance
Cheap pins are often either too soft (causing them to bend and become stuck) or too brittle (causing them to snap). Merit 173346 pins undergo a specialized heat treatment that creates a hard outer shell to resist wear from the tool shank, while maintaining a ductile core to absorb sudden impact shocks.
2. Precision Geometry
A perfectly machined pin ensures that the contact area with the tool notch is maximized. This reduces the “peening” effect (the flattening of the metal), which makes tool removal much easier during maintenance and prevents damage to the tool itself.
3. Direct OEM Fit
As a high-precision component, the 173346 is machined to exact tolerances. This ensures it slides into the Rammer 9033front head perfectly, aligning with the rubber lock pins to stay securely in place during high-frequency operation.
Maintenance Tip: When to Replace Pin 173346?
The retaining pins are wear parts and should be inspected daily:
- The “Mushroom” Check: If the ends of the pin are starting to flatten or “mushroom,” replace them immediately. A deformed pin can become permanently stuck in the front head, requiring expensive removal.
- Surface Scars: Deep grooves or notches in the pin indicate that the tool is rotating or vibrating excessively. Check your Lower Bushings for wear.
- The Golden Rule: Always replace retaining pins as a pair. If one is worn, the other is likely under high stress. Using one new and one old pin causes uneven loading on the tool shank.
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