OEM 860521345 The XCMG Seal Kit 860521345 is a genuine hydraulic seal kit for XCMG excavators, supplying the seals needed to rebuild one component.
The kit is packed under the official part number 860521345, so the technician receives a matched set rather than loose rings.
Each piece is molded or machined to the XCMG drawing, so the lip, section and hardness suit the groove it fills.
Oil-resistant rubber is standard, and tougher compounds are available where the joint sees high heat or heavy duty.
The set usually includes O-rings, lip seals, wipers, back-up rings and dust seals, depending on the component it serves.
Every part is checked for size, surface finish and compression set before the kit is sealed for shipment.
A complete kit lets the repair finish in one strip-down, which avoids a second teardown when an old seal starts to weep.
The 860521345 kit is assembled to the XCMG drawing, so every seal matches the bore, rod and groove it is meant for.
A complete set means the repair is finished in one pass, so labour is spent once and the machine returns sooner.
The main lip seals hold pressure on the oil side, so the component keeps its force and does not lose performance.
Wipers and dust seals keep grit away from the rod, which stops scoring and extends the life of the moving parts.
Back-up rings close the extrusion gap, so the soft lip keeps its shape under full working pressure.
Because the number matches the OEM part, the fitter installs each piece without trimming, stretching or guessing sizes.
Oil-resistant compound resists swelling and hardening, so the seals keep contact through hot and cold cycles.
A sound seal kit protects the barrel, rod and bearings, which is far cheaper than replacing the whole component.
Each lot starts with certified NBR or FKM compound tested for hardness, tensile strength, oil swell and compression set.
Parts are molded in polished tools under controlled heat and pressure, so lips and O-rings come out dense with no voids.
Trimming removes the parting line bead, leaving sealing edges that stay smooth around the full circumference.
Inspectors measure diameter, section and hardness on each part, then check the bag against the kit list for this number.
Records link every 860521345 kit to its rubber lots and molding presses, so a technical question is answered from documents.
A seal kit restores the sealing elements inside a component, so oil stays in and contamination stays out.
A hardened lip or a cut O-ring lets oil bypass, which weakens the component and heats the oil.
The genuine 860521345 restores the original seal geometry, so pressure is held and the component performs as designed.
Correct lip pressure avoids both weeping from light contact and friction damage from excessive squeeze.
A sound kit protects pumps, motors and cylinders, which keeps service intervals predictable and extends assembly life.
The 860521345 kit is fitted with a seal pick, a guide sleeve, grease and a torque wrench during component repair.
Release system pressure, drain the assembly and clean the work area so no dirt enters the bores during the repair.
Strip the component, then inspect the bore and rod for scoring, corrosion or a worn seal track before fitting new seals.
Lubricate each seal with clean grease, fit the back-up rings on the pressure side and seat every part square in its groove.
Slide the piston and rod in with a sleeve so the lips are not rolled, then close the component to the specified torque.
Refill with the specified oil, run the machine slowly and check the joints for weeping after the first pressure cycles.
At service intervals, look for oil film, a drifting cylinder or a creeping motor and renew the kit before failure.
Every 860521345 kit is produced in an ISO 9001 and ISO 14001 certified plant with traceability from compound to carton.
Incoming rubber is tested for hardness and oil swell, and finished parts are gauged for diameter, section and roundness.
Each batch is screened for voids, cracks and flash, since these defects open leak paths straight through a seal.
Release checks combine visual review, dimensional verification and a trial fit in the XCMG component fixture.
Samples from every lot go through oil soak, heat ageing and compression set testing to confirm long-term sealing.
Low-cost kits often use rubber that hardens in a season, so the seals leak and the component loses performance within weeks.
A seal with the wrong section can be over-squeezed on fitting or sit loose in its groove, and both cases end in leaks.
The genuine 860521345 is molded to the XCMG drawing, so diameter, section and hardness agree with the original parts.
Genuine parts also preserve warranty cover, protect resale value and keep compatibility with the rest of the component.
Backed by XCMG global quality standards and technical support, this seal kit performs reliably in harsh conditions.
Using the genuine 860521345 kit keeps a leaking component from becoming a full pump, motor or cylinder replacement.
A failed seal lets oil escape and dirt enter, which wears the internal parts and can stop the machine on site.
Resealing with a complete kit restores full performance, so the component delivers the force and speed it was designed for.
Reliable sealing extends oil and component life, which lowers the total cost of ownership across a working fleet.
Maintenance histories from construction and mining sites show genuine XCMG seal kits reduce unplanned stoppages.
XCMG molds the 860521345 kit with efficient cycles and close material control that keep production scrap low.
Resealing an existing component instead of scrapping it saves steel, chrome and the energy used to make a new one.
Stopping oil leaks protects soil and groundwater, helping operators meet rules on environmentally sensitive sites.
The rubber in this kit complies with RoHS and REACH requirements for safe handling and responsible recycling.
The 860521345 seal kit is stocked in XCMG depots serving North America, Europe, Asia and Australia.
Each kit is bagged with its parts listed and boxed in a strong carton that guards against dust, damp and distortion.
Fleet buyers can ask for volume pricing and combined freight, which simplifies planning and lowers landed cost.
Live stock data and responsive supply teams cover urgent requests quickly, so machines return to work sooner.
Careful packing keeps seals round and lips clean until fitting, avoiding the deformation seen in badly stored kits.
The XCMG Seal Kit 860521345 is an essential repair set on XCMG excavators, restoring the seals inside a hydraulic component.
Its complete contents, accurate sections and oil-resistant compound deliver dependable sealing in mud, dust and heat.
By holding pressure and protecting the rod, this kit cuts downtime, saves the component and extends assembly life.
Purchase only genuine XCMG parts from authorised dealers to secure real quality, correct fitment and lasting performance.
Specify the 860521345 seal kit for dependable sealing and confident, trouble-free servicing.
Work with XCMG, a trusted supplier of engine and hydraulic components for heavy equipment that delivers real value.
OEM 860521345 – XCMG Seal Kit – the definitive hydraulic seal kit for restoring pressure and protecting the component on your excavator. Molded to the drawing, packed as a complete set, and backed by global quality standards. Trust the original to protect your investment and maximise uptime.
