Product Overview

The 4640118 hydraulic cylinder seal kit is a factory-manufactured aftermarket replacement kit cross-referenced against the Hitachi part number 4640118. Independent parts catalogs consistently identify the number as the arm cylinder seal kit for Hitachi excavators: Hercules Sealing Products lists it as HIT-4640118 with a 115 mm rod x 170 mm bore for arm cylinder 4611472, and the same arm-cylinder application with the same 115 / 170 mm figures appears at hddistributors and in eBay listings, while seal-kits.com sells it as an “Original NOK” seal kit for the Hitachi excavator arm cylinder. The current DJF page titles the kit for Hitachi ZAXIS330 / ZAXIS360 / ZAXIS370 excavators (see Fitment Verification for the model-naming conflict).

DJF Seals manufactures and supplies the 4640118 kit at factory-direct wholesale pricing for excavator dealers, rental fleets, repair shops and fleet maintenance programs.

Verified Application

The following application data was cross-checked against aftermarket parts listings (Hercules Sealing Products, seal-kits.com, FridayParts, hddistributors, eBay):

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 arm cylinder (reference 4611472, per Hercules, hddistributors and eBay) of the verified Hitachi models. seal-kits.com offers the kit as a direct “Original NOK” seal kit listing for the Hitachi arm cylinder. Kit contents vary between suppliers, so the exact component set is matched to your cylinder before shipment.

Fitment Verification

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

• Hercules Sealing Products (herculesus.com, HIT-4640118): hydraulic seal kit, rod 115.000 x bore 170.000, application arm, code P-UB-14, cylinder 4611472, serial D04/08 and after, models ZX330, ZX330LC, ZX350LC, ZX350LCH, ZX350H, ZX350K, ZX350LCK, ZX370, ZX370MTH; additional rows for ZX330LC-5 (arm, mono boom; cylinders 4611472 and 0961401) and ZX350LC-5N.
• seal-kits.com: “4640118 Original NOK seal kit for Hitachi excavator arm cylinder, fits ZX330 ZX350LC”; the same store also links a related listing to the John Deere 330C LC arm cylinder.
• FridayParts: arm cylinder seal kit 4640118 with a wider Hitachi list (ZX330, ZX330-3, ZX350 family, ZX370MTH, ZX450 / ZX600 and ZAXIS-family names) — supplier-listed extension.
• hddistributors and eBay: 4640118 arm kit, rod 115 mm, bore 170 mm, cylinder 4611472 (eBay adds code P-UB-14 and the ZX330-ZX370 model set).
• Conflict note: the current page lists models “ZX330 / ZX350 / ZX360 / ZX370” and titles the kit for “ZAXIS330 / 360 / 370.” The verified model rows above follow Hercules (ZX330, ZX350 and ZX370 families). ZX360 appears only in the FridayParts list (as ZX360LC-3-HCMC) among the reviewed sources, and the ZAXIS-family naming appears on the current page and in marketplace titles rather than in the parts catalogs — treat ZX360 and the ZAXIS wording as unconfirmed.
• Conflict note: the current page reads “OEM part number 4640118 or 4649051.” 4649051 is a separate Hitachi arm cylinder seal kit number (listed by amoparts, FridayParts, aztechydraulics and ReliableAftermarketParts for ZX330-3 / ZX350-3 / ZX360LC-3 / ZX450 families) and is not the same kit as 4640118; the two numbers must not be treated as equivalents.
• Conflict note: material claims (PU / NBR on the page; NBR / PTFE / PU / rubber in the seal-kits.com listing) are supplier or factory data and are not independently verified, so they are not asserted above.
• Materials, pressure, temperature, exact piece counts, certifications and service life are not independently verified.

Factory Inspection & Packing

Each 4640118 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 4640118 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 4640118 seal kit fit?
A: Hercules lists the ZX330, ZX330LC, ZX350 family (ZX350LC, ZX350LCH, ZX350H, ZX350K, ZX350LCK) and ZX370 / ZX370MTH excavators; FridayParts adds a wider supplier-listed set. Verify the arm cylinder and machine model before ordering.

Q: Is this the arm cylinder kit?
A: Yes. Hercules, seal-kits.com, hddistributors and eBay all identify 4640118 as the arm cylinder kit, and Hercules and hddistributors give the cylinder reference 4611472.

Q: Does it also fit the ZX360 or the ZAXIS-named machines on the current page?
A: ZX360 (ZX360LC-3-HCMC) appears only in the FridayParts list among the reviewed sources, and the ZAXIS-family naming is page / marketplace wording; neither is asserted in the copy above. Confirm the machine model and cylinder reference.

Q: Is 4649051 the same kit?
A: No. 4649051 is a separate Hitachi arm cylinder kit number listed for other ZX model families; it must not be treated as an equivalent of 4640118.

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