6817081: Arm Hydraulic Cylinder Seal Kit for Bobcat Excavator 337G, 337WG, 341G
6817081 Arm Cylinder Seal Kit — Product Overview
The 6817081 Arm Cylinder Seal Kit is a heavy-duty aftermarket replacement for Bobcat 337G, 337WG, and 341G excavators. Designed for the arm (dipper) cylinder with 2-1/4″ rod and 3-1/2″ bore dimensions, this kit matches OEM cylinder specification 6818248 (S/N: 234611001-Up).
The 337G and 341G are Bobcat’s largest excavator platforms, with the 341G operating in the 40+ ton class for heavy construction, quarry, and demolition applications. The arm cylinder on these machines generates immense breakout forces during digging and trenching. Seal failure leads to arm drift, reduced digging power from internal oil bypass, and hydraulic oil contamination in harsh job site environments.
Constructed from high-grade polyurethane rod seals for maximum abrasion resistance, PTFE backup rings for extrusion prevention under peak breakout pressure, and NBR static seals etc, the 6817081 kit is built for the extreme demands of heavy-class excavator arm operation. DJF Seals supplies this kit at factory-direct wholesale pricing.
Technical Specifications
| Parameter | Specification |
| OEM Part Number | 6817081 |
| OEM Cylinder Number | 6818248 |
| Compatible Brand | Bobcat |
| Cylinder Application | Arm Cylinder (Dipper) |
| Rod Diameter | 2-1/4″ (57.2 mm) |
| Bore Diameter | 3-1/2″ (88.9 mm) |
| Material | Polyurethane, NBR, PTFE etc |
| Condition | New, Aftermarket Replacement |
| Business Type | Factory Direct Wholesale |
Compatible Models
- Bobcat 337G — Arm Cylinder (Cyl: 6818248, S/N: 234611001-Up)
- Bobcat 337WG — Arm Cylinder (Cyl: 6818248, S/N: 234611001-Up)
- Bobcat 341G — Arm Cylinder (Cyl: 6818248, S/N: 234711001-Up)
Key Features & Benefits
- Heavy-Class Arm Duty — 2-1/4″ rod × 3-1/2″ bore. Engineered for the extreme breakout forces and side loads of 30-40+ ton class excavator arm cylinder operation.
- OEM Cylinder Match — Direct replacement for Bobcat cylinder 6818248 on 337G, 337WG, and 341G platforms. No modification required.
- Extrusion-Protected — PTFE backup rings prevent seal extrusion under peak arm breakout pressure, a critical failure mode on heavy-class excavators.
- Complete Reseal Kit — Rod seal, piston seal, wiper, O-rings, and backup rings included for a full arm cylinder rebuild.
- Factory-Direct Wholesale — Competitive pricing with flexible MOQ. Bulk container shipping available for international heavy equipment parts distributors.