SB40 Hydraulic Breaker Oil Seal Kit – Complete Mini Excavator Breaker Repair

Parameters / Specifications

Kit contents may vary slightly depending on breaker serial number. Confirm with our team if unsure.

Product Technology

This SB40 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 Applications

• SB40 Hydraulic Breaker: Direct replacement seal kit for complete rebuild or routine oil seal replacement.

• Excavator Maintenance: Keep your breaker operating at peak performance class excavators.

• Repair Shops: Stock this kit for quick turnaround on customer breaker overhauls.

• Fleet Owners: Reduce downtime by having ready-to-install seal kits available for scheduled maintenance.

• Rental Companies: Ensure your rental breakers are always leak-free and reliable for the next customer.

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 SB40 breaker exactly?
Yes. This kit is precision-molded to match the original SB40 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 SB40 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.