Product Overview

The 31Y1-20430 seal kit is a factory-manufactured aftermarket replacement kit cross-referenced against the Hyundai part number 31Y1-20430. Independent aftermarket listings identify the kit as the adjustable-boom cylinder seal kit — applied to the left-hand (LH) and/or right-hand (RH) adjustable boom cylinders — for the Hyundai R160LC-7 / R160LC-7A excavators in an 80 mm rod x 115 mm bore configuration, with several resellers additionally referencing the R180LC-7 and R170W-7.

DJF Seals manufactures and supplies the 31Y1-20430 kit at factory-direct wholesale pricing for Hyundai equipment dealers, repair shops and fleet maintenance programs.

Verified Application

The following application data was cross-checked against aftermarket parts listings (OringsAndMore, Broken Tractor, YearnParts, FeiyueParts, eBay):

Note: materials, pressure rating, temperature range, exact piece counts, certifications and service life are factory data and are not independently verified.

Replacement Scope

This kit covers the sealing elements required to reseal the adjustable boom cylinder (LH/RH) of the verified Hyundai models. Independent listings describe the kit in the 80 mm rod x 115 mm bore configuration (OringsAndMore, Broken Tractor). Exact kit contents and piece counts should be verified with the factory against your cylinder before ordering.

Fitment Verification

The part number, cylinder position and fitments were verified through multiple independent sources:

• OringsAndMore (oringsandmore.com): “31Y1-20430 Adj Boom LH & RH cylinder seal kit fits Hyundai R160LC-7 / R160LC-7A” — 80 mm rod x 115 mm bore; adjustable boom position, both sides.
• Broken Tractor (brokentractor.com): “Hyundai R160LC-7 Boom Cylinder Seal Kit, Left Hand — 31Y1-20430” (LH, 80×115) — left-hand boom cylinder position.
• eBay: listings describing 31Y1-20430 as compatible with the Hyundai R160LC-7 and R180LC-7.
• YearnParts (yearnparts.com) and FeiyueParts (feiyueparts.com): boom cylinder seal kit 31Y1-20430 for the R160LC-7, with R170W-7 and/or R180LC-7 also referenced.
• Conflict note: position terminology differs — the current page writes “Adjust Boom / Boom”, while independent sources write “Adj Boom LH & RH” (OringsAndMore) or “Boom Cylinder Seal Kit, Left Hand” (Broken Tractor). The position is therefore described as the adjustable boom cylinder (LH/RH).
• Conflict note: R160LC-7 and R160LC-7A are confirmed across the source set. R180LC-7 and R170W-7 appear in some listings only and are not claimed as verified fitments on this page.
• Conflict note: no independent Hyundai OEM catalog reference was accessible for this part number; the identity and fitments above rely on aftermarket listings.
• Materials, pressure, temperature, exact piece counts, certifications and service life are not independently verified.

Factory Inspection & Packing

Each 31Y1-20430 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 31Y1-20430 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 machines does the 31Y1-20430 seal kit fit?
A: Verified fitments are the Hyundai R160LC-7 and R160LC-7A excavators. Some listings also reference the R180LC-7 and R170W-7; verify your machine model and serial number before ordering.

Q: Which cylinder does this kit service?
A: The adjustable boom cylinder — OringsAndMore lists it for the LH and RH adjustable boom cylinders, while Broken Tractor markets it as the left-hand boom cylinder kit.

Q: What are the cylinder dimensions for this kit?
A: 80 mm rod x 115 mm bore, per OringsAndMore and Broken Tractor.

Q: Is this the kit for the left-hand or the right-hand boom cylinder?
A: Listings show the same part number applied to the LH adjustable boom cylinder (Broken Tractor) and to both the LH and RH adjustable boom cylinders (OringsAndMore). Check with us which cylinder your machine uses before ordering.

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