Replacement Hydraulic Thumb Cylinder for Bobcat (PN: 6810475) Excavator Models 320, 322, 323, 324, E14, E16, E17, E17z, E19, E20, E20Z
Specifications for 1640412289
Category | Replacement Welded Rod Hydraulic Cylinders » Excavator » Compact/Mini Excavator |
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Fits Manufacturer | Bobcat Hydraulic Cylinders |
Models | Bobcat 320, Bobcat 322, Bobcat 323, Bobcat 324, Bobcat E14, Bobcat E16, Bobcat E17, Bobcat E17Z, Bobcat E19, Bobcat E20, Bobcat E20Z |
Function | Thumb / Bucket Clamp |
Features | Double-Acting Rod Hydraulic Cylinder (DAR) |
SKU | 1640412289 |
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Weight | 25 lbs |
Bore | 2.00″ |
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Rod | 1.00″ |
Stroke | 11.875″ |
Closed | 18.50″ |
Open Extended Length | 30.375″ |
Operating Pressure (PSI) | 3000 |
Base End Mount Type | Drilled Thru Base |
Base Pin Size | 1.00″ |
Base Mount Width | 2.375″ |
Rod End Mount Type | Cross-Tube |
Rod Pin Size | 1.00″ |
Rod Mount Width | 1.67″ |
Extend Port/Plunger | -6 JIC 90D |
Retract Port/Plunger | -6 JIC 90D |
Old OEM PNs | 6807513 |
Description
Replacement Thumb Cylinder for Bobcat 320–324 and E14–E20 series excavators. This aftermarket hydraulic cylinder replaces OEM part number 6810475 and restores dependable clamp function for machines equipped with a hydraulic thumb. It delivers the force needed to open and close the thumb attachment in sync with the bucket, making it ideal for gripping, lifting, and clearing debris.
This welded-rod cylinder offers long-term durability in demanding environments, and its double-acting design ensures smooth hydraulic movement in both directions. It is compatible with Bobcat 320, 322, 323, 324, E14, E16, E17, E17z, E19, E20, and E20z models. Some machines—such as the E17, E19, and E20—require specific Bobcat OEM thumb kits to use this cylinder. Those kit references are noted below for clarity.
Performance-built and warranty-backed, this all-steel hydraulic cylinder is made in the USA and engineered to meet or exceed OEM specifications. Count on it for consistent performance and rugged reliability across jobsites and conditions. Reclaim your machine’s full clamp function—Demolish Downtime.
2.00″
1.00″
11.875″
18.50″
30.375″
3000
Drilled Thru Base
1.00″
2.375″
Cross-Tube
1.00″
1.67″
-6 JIC 90D
-6 JIC 90D
6807513
Compatible Models:
- 320
- 322
- 323
- 324
- E14
- E16
- E17 (Via Bobcat Thumb, Bucket Clamp Kit 7270440)
- E17z
- E19 (Via Bobcat Thumb, Bucket Clamp Kit 7293706)
- E20 (Via Bobcat Thumb, Bucket Clamp Kit 7293706)
- E20z
Returning Merchandise
New and un-used stock items maybe returned for refund within 30 days of purchase. No returns are accepted without prior authorization, call 888-771-1894 or email sales@hydrauliccylindersinc.com to receive a return authorization number. Make sure to properly package your item to avoid damage in transit. Hydraulic Cylinders Inc. is not responsible for any shipping charges or damages for the return of product to Hydraulic Cylinders Inc. It is the responsibility of the sender to provide for all shipping, handling, and insurance charges.

Warranty Coverage:
Hydraulic Cylinders Inc. warrants its Replacement Welded Rod Cylinders against defects in materials and workmanship for 12 months from the date of purchase.
Exclusions & Conditions:
- Disassembly voids warranty coverage.
- Misuse, misapplication, or unauthorized modification is not covered.
- HCI does not provide engineering guidance or warrant product fitness for any specific application.
- It is the customer’s responsibility to ensure product suitability and compliance with all regulations and application requirements.
Claims Process:
Contact Hydraulic Cylinders, Inc. directly to initiate a warranty review. Claims require return and evaluation of the product.