Product Overview

The 6661051 hydraulic cylinder seal kit is a factory-manufactured OEM replacement kit for the boom cylinder of the Bobcat 231 excavator. Independent aftermarket catalogs consistently identify the number as the Bobcat 231 boom cylinder seal kit: Hercules Sealing Products lists it as BCK-6661051 with a 1.750 in. rod x 3.250 in. bore for the Bobcat 231 machines, HydraulicCylindersInc lists the same kit as a 3.25 in. bore x 1.75 in. rod kit for the Bobcat 231, ReliableAftermarketParts gives a 1-3/4 in. rod and 3-1/4 in. bore, and an eBay listing describes it as the 231 boom kit with 1-3/4 in. x 3-1/4 in. figures. The current DJF page titles the kit for the Bobcat excavator 231 boom, wording that matches the boom-cylinder position used across the aftermarket rows reviewed (see Fitment Verification).

DJF Seals manufactures and supplies the 6661051 kit at factory-direct wholesale pricing for Bobcat equipment dealers, repair shops, rental fleets and fleet maintenance programs.

Verified Application

The following application data was cross-checked against aftermarket parts listings (Hercules Sealing Products, HydraulicCylindersInc, ReliableAftermarketParts, eBay, Tractor Parts ASAP) and the current DJF product page:

Materials, pressure rating, temperature range, exact piece counts, certifications and service life are factory data and are not independently verified for this part number; such claims on the current page are not repeated here (see Fitment Verification).

Replacement Scope

This kit supplies the sealing elements needed to reseal the boom cylinder of the verified Bobcat 231 excavator. The Hercules BCK-6661051 rows anchor the Bobcat 231 machines, and HydraulicCylindersInc, ReliableAftermarketParts and the eBay listing repeat the same 231 boom application and 1-3/4 in. x 3-1/4 in. figures. Kit contents vary between suppliers, so the exact component set is matched to your cylinder before shipment.

Fitment Verification

The part number, cylinder position, fitments and dimensions above were cross-checked against the following sources:

• Hercules Sealing Products (herculesus.com / herculesca.ca, BCK-6661051): rod 1.750 in. x bore 3.250 in., with catalog rows anchored to the Bobcat 231 machines.
• HydraulicCylindersInc: lists the kit as a 3.25 in. bore x 1.75 in. rod kit that fits the Bobcat 231.
• ReliableAftermarketParts (RAParts): lists a 1-3/4 in. rod and 3-1/4 in. bore for the 6661051 kit.
• eBay and Tractor Parts ASAP: carry the 6661051 kit; the eBay listing describes it as the Bobcat 231 boom kit with 1-3/4 in. x 3-1/4 in. figures.
• Current DJF page (6661051-hydraulic-cylinder-seal-kit-for-bobcat-excavator-231-boom, SKU DJF-19497): titles the kit for the Bobcat excavator 231 boom.
• Conflict note: model wording — the current page names the Bobcat 231 excavator boom, while the Hercules rows are anchored to the Bobcat 231 machines and an Amazon note records a different number (6815085) for the 331 model. Both describe Bobcat excavator boom-cylinder applications; confirm your machine model and cylinder before ordering.
• Conflict note: the number 6815085 referenced for the Bobcat 331 is a different kit number and is not the same as 6661051; the two are kept separate here.
• Materials, pressure, temperature, exact piece counts, certifications and service life are not independently verified.

Factory Inspection & Packing

Each 6661051 kit is assembled and checked at the DJF factory before packing. Sealing elements are placed in labeled poly bags marked with the part number, then packed into export cartons for protection during international shipping. Kits can be packed under DJF branding, neutral packaging, or your own private label for distribution.

Wholesale Ordering

DJF Seals supplies the 6661051 kit at factory-direct wholesale pricing for distributors, dealers and repair shops. To request a quotation, send your part number and quantity to [email protected] or [email protected]. OEM/ODM service, custom packaging and bulk container shipping are available for regular programs.

MOQ

MOQ: 5 kits.

FAQ

Q: Which machine does the 6661051 seal kit fit?
A: The Bobcat 231 excavator. The Hercules BCK-6661051 rows are anchored to the Bobcat 231 machines, and HydraulicCylindersInc, ReliableAftermarketParts and the eBay listing repeat the same 231 application. Verify your machine before ordering.

Q: Which cylinder does it seal?
A: The boom cylinder. The current page and the eBay listing both use boom wording, and the Hercules catalog rows anchor the Bobcat 231 machines.

Q: What are the rod and bore of this kit?
A: Hercules lists rod 1.750 in. x bore 3.250 in., HydraulicCylindersInc lists 3.25 in. bore x 1.75 in. rod and ReliableAftermarketParts lists a 1-3/4 in. rod and 3-1/4 in. bore, so the figures agree across the independent sources.

Q: Is 6815085 the same kit?
A: No. 6815085 is recorded for the Bobcat 331 model and is a different kit number; the 6661051 kit covered here is for the Bobcat 231 boom.

Q: What is the minimum order quantity?
A: MOQ: 5 kits.