7156581 Boom/Arm Cylinder Seal Kit — Product Overview
The 7156581 Boom/Arm Cylinder Seal Kit is a comprehensive aftermarket replacement for Bobcat 331, 331E, 334, and 430 excavator boom and arm cylinders. Engineered for 1-3/4″ rod and 3-1/4″ bore hydraulic systems, this kit delivers OEM-equivalent sealing performance for both lift and crowd functions. Cross-references with OEM part 7162060.
Boom and arm cylinders on the Bobcat 331/430 series operate under continuous cyclical loading — lifting, lowering, and articulating the front attachment assembly. Seal failure in these circuits leads to dual-symptom breakdown: boom drift during stationary holding and arm creep under digging resistance. The 7156581 kit addresses both failure modes with application-matched seal compounds.
Manufactured with high-performance polyurethane rod seals and NBR static seals etc, this kit provides reliable containment across the full operating temperature range of Bobcat excavators. DJF Seals supplies the 7156581 at factory-direct wholesale pricing — one kit covering both boom and arm cylinder positions on four Bobcat models.
Technical Specifications
| Parameter | Specification |
| OEM Part Number | 7156581 |
| Cross Reference | 7162060 |
| Compatible Brand | Bobcat |
| Cylinder Application | Boom / Arm Cylinder |
| Rod Diameter | 1-3/4″ (44.5 mm) |
| Bore Diameter | 3-1/4″ (82.6 mm) |
| Material | Polyurethane, NBR, PTFE etc |
| Kit Contents | Rod seal, Piston seal, Wiper, O-rings, Backup rings |
| Condition | New, Aftermarket Replacement |
| Business Type | Factory Direct Wholesale |
Compatible Models
- Bobcat 331 — Boom / Arm Cylinder
- Bobcat 331E — Boom / Arm Cylinder
- Bobcat 334 — Boom / Arm Cylinder
- Bobcat 430 — Boom / Arm Cylinder
Key Features & Benefits
- Dual-Position Compatibility — One kit services both boom and arm cylinders on Bobcat 331/430 series, reducing the number of unique SKUs required for fleet maintenance inventory.
- Cross-Referenced Coverage — Direct replacement for OEM part 7162060. Compatible with 7156581-specified cylinder assemblies across four Bobcat excavator models.
- Cyclic-Load Endurance — Polyurethane rod seals engineered for the repetitive extension/retraction cycles typical of boom and arm operations, maintaining seal integrity through thousands of duty cycles.
- Complete Overhaul Kit — Includes rod seal, piston seal, wiper, O-rings, and backup rings — all components required for a full boom or arm cylinder reseal in one package.
- Factory-Direct Wholesale — Competitive pricing with flexible MOQ. OEM/ODM service available with custom branding and packaging for Bobcat parts distributors.
Description for 7156581 Seal Kit
The 7156581 Hydraulic Cylinder Seal Kit Contains All The Seals Required for A Complete Seal Replacement and Repair of Standard-Sized Hydraulic Cylinders on Bobcat Excavators (Models 331, 331E, 334, 430).
Specifications for 7156581 Seal Kit
| Feature | Details |
|---|---|
| Part Number | 7156581 |
| Machine Type Compatibility | Bobcat Excavators |
| Application Model | 331, 331E, 334, 430 |
| Application Area | Boom / Arm |
| Rod Diameter | 1-3/4″ |
| Bore Diameter | 3-1/4″ |
| Material | High-performance Polyurethane, NBR, PTFE etc |
| Kit Contents | Piston seals, Rod seals, Wiper seals, O-rings, and Backup rings etc |
| Service | OEM ODM |
| Brand | DJF / Neutral / Custom your logo |
Compatible Models for part number 7156581
The 7156581 Seal Kit is compatible with the following Bobcat models and applications:
- Bobcat Excavator:
331, 331E, 334, 430