878000425 Arm Cylinder Seal Kit for Komatsu PC95R-2 Excavator
Product Overview
The 878000425 hydraulic cylinder seal kit is a factory-manufactured aftermarket replacement kit cross-referenced against the Komatsu part number 878000425. The current DJF page titles the kit as the arm cylinder seal kit for the Komatsu PC95R-2 excavator, and independent aftermarket catalogs (Hercules Sealing Products, TornadoParts and HydraulicPartsOnline) carry the number in a 60 mm rod x 100 mm bore configuration. The Komatsu PC95R-2 is a crawler midi excavator (approx. 8.75-9.36 t operating weight, 61.5 kW, swing offset boom) per the Komatsu Europe product archive.
The arm cylinder positions the digging arm of the excavator. This kit covers the sealing elements used to reseal that cylinder. The boom cylinder is a separate kit with its own part number (878000607) and its own DJF page. DJF Seals manufactures and supplies the 878000425 kit at factory-direct wholesale pricing for Komatsu excavator dealers, repair shops and fleet maintenance programs.
Verified Application
The following application data was cross-checked against aftermarket parts listings, the Hercules Sealing Products catalog (herculesus.com / herculesca.ca) and the Komatsu Europe product archive:
| Part Number | 878000425 (Komatsu reference) |
| Product Type | Arm cylinder seal kit (aftermarket replacement) |
| Cylinder Position | Arm cylinder — per the current DJF page title; companion aftermarket listings treat 878000425 as the separate arm kit (the boom cylinder kit 878000607 is a different part number) |
| Verified Fitments | Komatsu PC95R-2 crawler midi excavator (current DJF page); machine class confirmed by the Komatsu Europe product archive (approx. 8.75-9.36 t operating weight, 61.5 kW, swing offset boom) |
| Rod x Bore (per Hercules, TornadoParts and HydraulicPartsOnline) | Rod 60 mm / Bore 100 mm |
| Condition | New, aftermarket replacement |
Materials, pressure rating, temperature range, exact piece counts, certifications and service life are factory data and are not independently verified for this part number.
Replacement Scope
This kit covers the sealing elements required to reseal the arm cylinder of the Komatsu PC95R-2 application. Kit contents vary between suppliers, so the exact component set is matched to your cylinder before shipment. This kit covers the arm cylinder only — it does not cover the boom cylinder (878000607) or the bucket cylinder, which are separate applications.
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), TornadoParts (tornadoparts.com) and HydraulicPartsOnline (hydraulicpartsonline.com): 878000425 with a 60 mm rod x 100 mm bore.
- Machine reference: the Komatsu Europe product archive lists the PC95R-2 as a crawler midi excavator (approx. 8.75-9.36 t operating weight, 61.5 kW, swing offset boom); RitchieSpecs and Lectura Specs were used as additional machine reference data.
- Current DJF page: title/H1 “878000425 Arm Cylinder Seal Kit for Komatsu PC95R-2 Excavators”.
- Companion kit: the PC95R-2 boom cylinder seal kit 878000607 (70 mm rod x 120 mm bore, cross-reference HYI40-0582, per O-ringsandMore, ReliableAftermarketParts and Zoro) has its own DJF page, which explicitly notes that “arm cylinder kit 878000425 is a separate kit” — arm and boom are separate kits with separate part numbers, and marketplace listings sometimes sell the pair together.
- Serial note: the reference serial range 21D5220114-21D5220430 is published with the boom kit 878000607 listing and belongs to that boom application; it is not asserted for this arm kit — confirm your machine serial number before ordering.
- Materials, pressure, temperature, exact piece counts, certifications and service life are not independently verified.
Factory Inspection & Packing
Each 878000425 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 878000425 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 878000425 seal kit fit?
A: The current DJF page titles the kit for the Komatsu PC95R-2 crawler midi excavator. The Komatsu Europe product archive confirms the machine class (approx. 8.75-9.36 t operating weight, 61.5 kW, swing offset boom). Confirm the full machine model including the dash number before ordering.
Q: Which cylinder does this kit service?
A: The arm cylinder. The boom cylinder has its own separate kit, 878000607 (70 mm rod x 120 mm bore), which is a different part number; this kit does not cover the boom or bucket cylinder.
Q: What are the cylinder dimensions for this kit?
A: Rod 60 mm x bore 100 mm, per Hercules Sealing Products, TornadoParts and HydraulicPartsOnline.
Q: Does the serial range on the boom listing apply to this kit?
A: No. The reference serial range 21D5220114-21D5220430 is published with the boom kit 878000607 listing and is not asserted for this arm kit — send your machine serial number so we match the correct kit.
Q: What is the minimum order quantity?
A: MOQ: 5 kits.
