The 7137770 Seal Kit is a high-quality replacement lift cylinder seal kit designed for BOBCAT skid steer loaders and compact excavators. Manufactured by SANPING SEAL, this kit includes all necessary seals, O-rings, wipers, and a piston nut required for hydraulic cylinder repair. The kit is designed for cylinders with a 1-1/4″ (31.75mm) rod diameter and 2″ (50.8mm) bore diameter . Made from premium NBR (Nitrile Butadiene Rubber) material, it provides excellent resistance to mineral oils, high temperatures up to 120°C, and abrasive wear.
SANPING SEAL – Engineering Machinery High-End Seals – 17 Years Export Expertise
Welcome to SANPING SEAL’s high-quality replacement seal kit solution for BOBCAT equipment. The 7137770 Seal Kit is engineered to deliver reliable performance for lift cylinder repair and overhaul. Whether you are a heavy equipment owner, a fleet manager, a maintenance contractor, or a parts distributor, this seal kit is your ideal choice for keeping BOBCAT equipment running efficiently.
Product Overview
The 7137770 Seal Kit is specifically designed for use in BOBCAT skid steer loaders and compact excavators, primarily for lift cylinder applications. This OEM replacement part number is widely used across multiple BOBCAT model families, including S100, S130, S450, S70, T110, T140, and E series compact excavators .
Hydraulic lift cylinders are critical components responsible for raising and lowering the loader arms. Over time, seals wear out due to heat, pressure cycles, contamination, and normal aging. When seals fail, hydraulic oil leaks, lift performance drops, and costly downtime begins.
Our 7137770 Seal Kit provides a complete solution. Instead of sourcing individual seals from different suppliers, you get everything in one box – precisely manufactured to meet or exceed OEM specifications. Every component is made from high-grade NBR material, chosen for its excellent compatibility with hydraulic oils, its heat resistance, and its durability under demanding working conditions.
Specifications and Parameters：
Minimum order: 5 sets
| Parameter |
Detail |
| Product Code |
7137770 |
| Compatible Brand |
BOBCAT |
| Minimum Order Quantity |
5 sets |
| Application |
Lift cylinder, blade cylinder, arm cylinder |
| Rod Diameter |
1-1/4 inches (31.75 mm) |
| Bore Diameter |
2 inches (50.8 mm) |
| Material |
High-grade NBR (Nitrile Butadiene Rubber) |
| Hardness |
70-90 Shore A (depending on component) |
| Temperature Range |
-35°C to +120°C |
| Pressure Rating |
Up to 350 bar (35 MPa) |
| Quality Assurance |
Pre-production sample testing + final inspection before shipment |
| Packaging |
Sealed plastic bag + branded box |
Kit Components Included
The 7137770 Seal Kit contains all necessary seals for a complete lift cylinder rebuild, based on OEM specifications :
● Rod Seal (Wiper) – Primary sealing element for the piston rod, preventing contaminants from entering and oil from leaking out
● Piston Seal (Quad Ring) – Seal between piston and cylinder bore, maintaining pressure across the piston
● O-Rings – Static sealing for end caps, glands, and other threaded connections
● Piston Nut – Secures piston to the rod
● Backup Rings – Prevent O-ring extrusion under high pressure (included where applicable)
All components are manufactured with precise dimensional tolerances to ensure a perfect fit with original BOBCAT cylinder components.
Compatible BOBCAT Models
The 7137770 Seal Kit is compatible with a wide range of BOBCAT equipment models :
Skid Steer Loaders:
● S Series: S70, S100, S130, S450
● 400 Series: 418, 463
● 700 Series: 751, 753
● 300 Series: 319, 321, 323
● MT Series: MT50
Compact Track Loaders:
● T Series: T110, T140, T450
Compact Excavators:
● E Series: E08, E10, E10e, E10z, E14, E17, E17z, E26
Other Models:
● 653
Note: Parts can vary depending on serial number. We recommend checking your machine serial number before placing an order . Our sales team can assist with fitment verification.
Compatible OEM Part Numbers
The 7137770 Seal Kit replaces the following original BOBCAT part numbers :
● 7137770 (current OEM)
● 6804927 (cross-reference)
● 6809201 (lift cylinder specific)
● 6812771 (alternate for S70)
Product Features
1. OEM Fit and Compatibility
The 7137770 Seal Kit is designed to match original BOBCAT specifications for 1-1/4″ rod diameter and 2″ bore diameter cylinders . All dimensions, materials, and performance characteristics are verified against OEM standards.
2. Premium NBR Material
We use only high-grade NBR (Nitrile Butadiene Rubber) for our seal kits. NBR offers outstanding resistance to mineral oil-based hydraulic fluids, excellent abrasion resistance, good tensile strength, and stable performance across a wide temperature range (-35°C to 120°C).
3. Complete All-in-One Kit
No need to search for individual seals or order from multiple suppliers. The 7137770 includes every seal required for a full lift cylinder overhaul, including wiper rod seal, O-rings, quad ring seal, and piston nut .
4. Strict Quality Control
Each batch undergoes two rounds of quality verification: pre-production sample testing before mass production, and final inspection before shipment.
5. Cost-Effective Alternative
OEM BOBCAT seal kits can be expensive. The 7137770 offers comparable quality and performance at a significantly lower price point.
6. Extended Service Life
Field data from customers shows that our seal kits typically last 10-12 months in demanding conditions (12-hour shifts, 6 days per week), compared to 2-3 months for generic, low-quality alternatives.
Why Choose SANPING SEAL?
17 Years of Export Expertise
Guangzhou Sanping Machinery Co., Ltd., established in 2009, has served customers across South Asia, Southeast Asia, Africa, South America, the Middle East, and Europe.
Specialized Focus
We concentrate exclusively on engineering machinery high-end seals – not general industrial seals. This specialization means we understand BOBCAT equipment applications better than general seal suppliers.
Quality Guarantee
Every order follows our two-step quality process: pre-production sample testing before mass production, and final inspection before shipment.
Responsive Support
Our sales team responds to inquiries within 24 hours. Our technical team provides application guidance and seal selection support. Our logistics team ensures smooth shipment documentation and delivery.
Frequently Asked Questions (FAQ)
Q: What is the minimum order quantity (MOQ) for the 7137770 Seal Kit?
A: The MOQ is 5 sets.
Q: How long is the delivery time?
A: For standard quantities (5-20 sets), delivery is typically 7-10 days. For bulk orders (50+ sets), delivery is 15-20 days after order confirmation.
Q: What are the cylinder dimensions for this seal kit?
A: This seal kit is designed for cylinders with a 1-1/4″ (31.75mm) rod diameter and 2″ (50.8mm) bore diameter .
Q: Does this kit fit BOBCAT S130 and S70 models?
A: Yes, this kit is compatible with BOBCAT S130, S70, S100, S450, T110, T140, and many other models .
Q: What components are included in the kit?
A: The kit includes wiper rod seal, quad ring seal, O-rings, piston nut, and other necessary seals .
Q: What material is used for the seals?
A: All seals in the 7137770 kit are made from high-grade NBR (Nitrile Butadiene Rubber), the industry standard for hydraulic cylinder applications.
Q: Do you accept custom orders for non-standard sizes?
A: Yes, we accept custom orders. Please provide your specifications, dimensions, and required quantities. Lead time for custom orders is typically 20-25 days.
Q: What payment methods do you accept?
A: We accept T/T (bank transfer), L/C, MoneyGram, Western Union, and cash.
Q: What are your shipping terms?
A: We offer FOB, CIF, and EXW delivery terms. Shipping is available via sea freight, air freight, or international courier (DHL, FedEx, UPS).
