OEM 318502139 The XCMG Hydraulic Oil Reservoir 318502139 is a genuine welded tank that stores, settles and supplies hydraulic oil on XCMG hydraulic excavators.
Issued under the official part number 318502139, the reservoir gives the technician a correctly sized tank that matches the mounting brackets, ports and dipstick location it is designed for.
The shell and baffles are cut, formed and welded to the XCMG drawing, so the ports, filler neck and mounting feet align with the chassis without cutting or re-drilling.
Internal baffles slow oil surge, so the pump pick-up stays covered when the machine works on slopes or swings quickly.
A protective coating resists oil, water and corrosion, so the tank keeps its strength and finish through wash-down and long outdoor duty.
Every unit is pressure tested for leaks and checked for port position, baffle layout and surface finish before the batch is packed for shipment.
Fitted to the main hydraulic circuit, this reservoir keeps oil clean, cool and available so pumps, valves and cylinders work reliably.
The 318502139 reservoir is produced to the XCMG drawing, so the ports, feet and dipstick location line up with the chassis on the first attempt.
Internal baffles slow oil surge, so the pump pick-up stays covered when the machine works on slopes or swings quickly.
Welded seams are pressure tested, so the tank does not weep oil at the seams or at the port bosses.
The coating resists oil, water and wash chemicals, so the tank does not rust through or flake into the oil over time.
Because the part matches the OEM number, a fitter installs it straight from the crate without cutting, bending or adding adapters.
Correct plate thickness keeps the shell rigid under pressure pulses, so the tank does not bulge or crack at the welds.
A sound tank also lets contaminants settle at the bottom, so the filter and pump stay clean and last longer.
Keeping a spare tank on the shelf shortens repair time, so a cracked reservoir does not turn into a full day of lost work.
Each lot begins with certified steel plate tested for thickness, chemistry and tensile strength before it reaches the fabrication line.
Shells and baffles are cut and welded in controlled fixtures, so the ports, feet and internal layout stay uniform from batch to batch.
Grinding and deburring clean the weld edges, so the tank seats flat and does not cut hands, hoses or the mounting bracket.
Inspectors measure port positions, dimensions, baffle layout and weld quality against a gauge made for this exact part number.
Batch records trace every 318502139 reservoir to its steel lot and production run, so a quality question is settled quickly.
A hydraulic oil reservoir stores the oil the system needs and lets air and contamination settle out before the oil reaches the pump.
A cracked or leaking tank lets oil escape and air enter, which causes pump cavitation, overheating and unexpected failure.
The genuine 318502139 keeps the oil contained, so the circuit holds pressure and the pump gets a steady, clean supply.
Correct fit avoids both a tank that rubs against a hose and one that sits too close to a hot or moving part.
A sound reservoir protects the pump, valves and cylinders, which keeps service intervals predictable and extends machine life.
The 318502139 reservoir is installed with a cleaning cloth, a spanner set and lifting gear during hydraulic service work.
Drain the old tank, disconnect the hoses and clean the mounting area so no dirt or oil sits under the new part.
Check the chassis, brackets and hoses for cracks, rust or damage, since a bad mount will stop the tank sitting flat.
Lift the tank into place, start the mounting bolts by hand and reconnect the hoses and fittings before tightening.
Tighten to the torque in the service data, so the tank stays put without crushing the shell or stripping the thread.
Fill with the specified oil, run the machine slowly and check the seams and ports for weeping after the first pressure cycles.
At service intervals, look for oil film, a cracked seam or a loose mount and renew the part before the leak spreads.
Every 318502139 reservoir is produced in an ISO 9001 and ISO 14001 certified plant with traceability from steel to crate.
Incoming steel is tested for thickness and chemistry, and finished tanks are gauged for port positions, dimensions and baffle layout.
Each batch is screened for weld porosity, cracks and coating defects, since these flaws cause leaks or shell failure.
Post-production checks include visual review, dimensional verification, a pressure leak test and a trial fit on the XCMG chassis fixture.
Sample tanks from each batch undergo vibration and salt spray tests to confirm strength and corrosion performance.
Cheap copies often use thin plate and poor welds, so the tank cracks, weeps oil or bulges soon after the machine starts working.
A reservoir with the wrong port positions or baffle layout can rub a hose, starve the pump or leave the dipstick unreadable.
The genuine 318502139 is made to the XCMG drawing, so ports, feet, capacity and material match the original part.
Using genuine XCMG parts also preserves warranty coverage, protects resale value and keeps fit with OEM chassis points.
Backed by XCMG global quality standards and technical support, this oil reservoir performs reliably in harsh conditions.
Choosing the genuine 318502139 reservoir prevents a small weep from turning into a damaged pump or a seized cylinder.
A failed tank lets oil escape and air enter, which causes cavitation, overheating and unplanned downtime.
A correctly made tank holds pressure and volume, so it does not need repeated welding and does not leak between services.
Reliable reservoirs also keep oil clean, which improves machine performance and lowers ownership cost.
Service records from construction and mining fleets show genuine XCMG parts cut unplanned downtime.
XCMG produces the 318502139 reservoir with efficient cutting and welding runs that keep production scrap low.
A long service life means fewer replacements, which lowers the material and energy tied to each reservoir.
Containing hydraulic oil prevents leaks and contamination, which protects soil, groundwater and internal parts.
The materials in this part comply with RoHS and REACH requirements for safe handling and responsible recycling.
The 318502139 reservoir is stocked in XCMG depots serving North America, Europe, Asia and Australia.
Each unit is wrapped to protect the coating and boxed or palletised in strong packing that guards against dust, damp and impact.
Fleet buyers can request volume pricing and combined freight, which simplifies planning and lowers landed cost.
Live stock data and responsive supply teams cover urgent requests fast, so machines return to work sooner.
Careful packing keeps the shell square and the ports undamaged until fitting, avoiding the distortion seen in loose storage.
The XCMG Hydraulic Oil Reservoir 318502139 is a key hydraulic part on XCMG excavators, storing and supplying the oil the circuit needs.
Its accurate ports, correct baffle layout and durable coating deliver dependable oil supply in rain, dust and heat.
By keeping oil contained and clean, this reservoir cuts downtime, protects the pump and extends the life of the assembly.
Buy only genuine XCMG parts from authorised dealers to secure real quality, correct fitment and lasting performance.
Specify the 318502139 reservoir for dependable oil supply and confident, trouble-free servicing.
Work with XCMG, a trusted supplier of engine and hydraulic components for heavy equipment that delivers real value.
OEM 318502139 – XCMG Hydraulic Oil Reservoir – the definitive oil tank for clean, reliable hydraulic supply on your excavator. Fabricated to the drawing, pressure tested for a precise fit, and backed by global quality standards. Trust the original to protect your investment and maximise uptime.
