Premium SB121 Hydraulic Breaker Oil Seal Kit – Complete Seal Set for Hammer Rebuild

Product Features

• Complete Seal Coverage: Includes every oil seal, O-ring, backup ring, and diaphragm needed for a full SB121 breaker rebuild — no need to source parts separately.

• Premium Materials: Polyurethane oil seals offer excellent abrasion resistance; NBR O-rings provide reliable static sealing; PTFE backup rings prevent extrusion under high pressure.

• OEM-Equivalent Fit: Precision-molded to match original SB121 dimensions, ensuring drop-in installation without leaks or misalignment.

• High-Temperature Stability: Seals maintain elasticity and sealing performance from -30°C to +110°C.

• Low Friction Operation: Optimized seal lip design reduces friction and heat generation, extending component life.

• Leak-Proof Performance: Designed to prevent internal and external hydraulic oil leakage, keeping your breaker running at full power.

Product Technology

This SB121 seal kit is manufactured using advanced molding and CNC machining techniques. Polyurethane oil seals are injection-molded and post-cured to achieve target hardness and dimensional accuracy. NBR O-rings are compression-molded from high-quality rubber compounds with excellent oil resistance. PTFE backup rings are machined from premium-grade polymer for high strength and low creep. Each seal is individually inspected for dimensional conformity and surface quality before packaging.

Product Advantages

• Cost-Effective Rebuild Solution: Replacing seals is a fraction of the cost of a new breaker or major component replacement.

• Reduced Downtime: Complete kit means you have everything on hand to finish the job in one shop visit.

• Extended Breaker Life: Fresh seals restore efficiency and prevent internal damage caused by oil leakage or contamination.

• OEM-Quality at Lower Price: Save 30–50% compared to genuine OEM seal kits while getting identical fit and performance.

• Trusted by Professionals: Field-tested in demanding demolition, quarry, and construction applications worldwide.

• One-Stop Shopping: We also stock chisels, bushings, pistons, and other SB121 breaker parts.

Company Service

• Global Shipping: Fast, insured delivery via sea, air, or express courier to any job site or warehouse worldwide.

• OEM & Custom Orders: Custom seal configurations available for modified breakers or special working conditions.

• 24/7 Technical Support: Installation guidance and troubleshooting via phone, email, or video call.

• Complete Parts Inventory: Seal kits, chisels, pistons, and bushings stocked for immediate dispatch.

• 12-Month Warranty: Every seal kit is covered against manufacturing defects.

• Bulk Discounts: Special pricing for repair shops, distributors, and fleet owners ordering multiple kits.

FAQ

Q1: Will this oil seal kit fit my SB121 breaker exactly?
Yes. This kit is precision-molded to match the original SB121 seal dimensions. However, if your breaker has been modified or is an early production model, please confirm the serial number with our team before ordering to ensure compatibility.

Q2: What is included in the kit?
The kit typically includes all oil seals, O-rings, U-cup piston seals, backup rings, wiper seals, and accumulator diaphragm needed for a complete rebuild. A detailed parts list is included in the package.

Q3: How often should I replace the seals in my SB121 breaker?
Under normal operating conditions, seals should be replaced every 1,500–2,000 working hours or whenever you notice hydraulic oil leakage, reduced impact power, or nitrogen pressure loss. Regular inspection will help determine the right interval.

Q4: Can I install this seal kit myself?
Yes, installation is possible for experienced mechanics with the proper tools. The kit includes installation instructions. If you are unfamiliar with breaker disassembly, we recommend having a professional technician perform the rebuild. Video call support is available 24/7.

Q5: What causes premature seal failure?
Contaminated hydraulic oil, overheating, excessive operating pressure, and using the wrong type of hydraulic oil can all shorten seal life. Always maintain clean oil and correct operating parameters to maximize seal longevity.

Q6: Do you offer individual seals if I only need one or two?
While this is a complete kit, we can also supply individual seals. Contact our parts team with the specific seal you need, and we will source or manufacture it for you.

Q7: Is this an OEM seal kit?
This is a high-quality aftermarket seal kit manufactured to OEM specifications. It is not a genuine OEM part, but it matches OEM fit and performance at a significantly lower price. Many repair shops and fleet owners choose our kit for reliability and value.