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Urethane Backup Ring Kit. HERCULES HYDRAULICS KIT

Alternate Part Numbers Alternate Part Number C1BV86, Alternate Part Number MI-03014316, Alternate Part Number MINO-00407X31662	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Supplier Part Number 575 KIT	Product Weight 2.00 lbs

Product Questions & Answers 2

Product Questions & Answers

what exactly is a backup ring kit used for in a hydraulic setup?

Question by: Lee J on Dec 30, 2025, 3:14 PM

Backup rings go in alongside primary seals to keep them from extruding into the gap between mating components under pressure. Without them, a soft seal can get pushed out of its groove over time, especially in higher-pressure systems, and you end up with leaks a lot sooner than you should. The urethane material in this kit holds up well against that kind of mechanical stress compared to softer elastomers.

Answer by: Customer Support on Jan 1, 2026, 6:27 AM

So, this is just a kit of urethane backup rings, right? Just wanna make sure I'm lookin' at the right thing.

Question by: Kurt S on May 5, 2025, 1:00 PM

Functionally, yes, this Hercules Hydraulics kit provides you with urethane backup rings. It's catalog number C1BV86.

Answer by: Customer Support on May 7, 2025, 10:52 AM

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575-KIT	HERCULES HYDRAULICS KIT