Description
The 1810028290 is the O.I.S. J-35 SERVICE ELEMENT, the oil-injected screw element Atlas Copco lists across its mobile compressor fleet. The coverage runs from the X-AIR portable range through the Stage V and T4 emissions builds of the H, V, X28 and Y35 families to the large XRVS, X-AIR+ and XRX units, and it reaches the Wuxi-built CKD packages as well.
The stage sits at the end of a long line. Atlas Copco records the 1810028290 as the newest version of six earlier numbers, with 2934998823 the last of them, so machines documented under any of the old references are serviced with this one stage today.
The unit carries two numbers of its own. The item record names it as the 1810028290, and the housing plate reads the production number 1810028280 with a serial of its own, built in Belgium. This article sets out what the J-35 designation covers, how the old numbers resolve, which machines take the stage, and how fitment is confirmed before an order is placed.
Identity of the 1810028290 Element
An element is the core compression stage of a screw compressor, and the 1810028290 fills that role as the J-35 stage. It converts shaft power into air flow at pressure, and it is a long-life factory assembly: the rotor pair, the housing and the bearings are built as one and renewed as one.
The interfaces on that assembly are set by the machines it was built for, which is why the 1810028290 is confirmed against a compressor record rather than against a description.
What the OIS J-35 Designation Covers
OIS is the oil-injected screw designation, and J-35 is the stage code Atlas Copco records for this element. The code separates the J-35 from the other stages of the mobile family, and it is quoted in the official parts documentation exactly as it stands.
Atlas Copco prints the same number in two forms. The ten-digit form 1810028290 is what the item record carries, and 1810 0282 90 is the printed form used across the parts documents. Both name the same stage, and either one can be used when a renewal is being confirmed.
The Production Number on the Housing Plate
The plate on the housing of the 1810028290 reads 1810028280, the production number of the unit, together with a serial that ties it to its build record. The two numbers name one and the same stage: 1810028280 is what the factory plate carries, and 1810028290 is the reference the parts records and orders are written against.
That pairing is worth keeping straight in the machine file. A fitter reading the plate and a planner reading the spares list quote different numbers for the same position, and knowing both ends the confusion before it starts. Seadweer confirms the pairing against the parts records when an enquiry is handled.
Where Old Numbers Point Today
The J-35 stage has been renumbered more than once in its life. Atlas Copco’s official parts documentation lists the 1810028290 as the newest version of six part numbers, and every one of them resolves to the same stage position.
| Earlier number | Status today |
| 1616691191 | Superseded by 1810028290 |
| 1616709891 | Superseded by 1810028290 |
| 1616725890 | Superseded by 1810028290 |
| 1616761280 | Superseded by 1810028290 |
| 1616761290 | Superseded by 1810028290 |
| 2934998823 | Superseded by 1810028290 |
Reading the Chain in a Machine File
A fleet that has run these machines for years can carry several of the old numbers side by side: one machine documented under 2934998823, the next under 1616761290, a third under a reference nobody remembers ordering. The table above ends that discussion, because all six point to the 1810028290.
Atlas Copco’s own item data names 2934998823 directly as the number it replaced, and the official parts documentation extends the line to the full six. Either way, the direction is the same: orders placed against any old record are directed to the current one.
Ordering Against an Old Record
An old number on a service sheet is not a problem at the counter. Quote it together with the machine details and the parts desk confirms the 1810028290 in one pass, so the renewal proceeds without a rewrite of the machine file first.
Plants that prefer tidy records update the file at fitment: the old number comes out, the current one goes in, and the next enquiry starts clean. The stage itself does not change in the meantime.
Compressors That Take the 1810028290
Atlas Copco’s official parts documentation lists the 1810028290 across an unusually wide part of the mobile fleet. The documented coverage falls into four groups, collected in the table below and taken in turn afterwards.
| Group | Documented units |
| X-AIR / X-AIR+ portable range | X-AIR 550-17, 850-290, 900-20, 1100-23, 1200-25; X-AIR+ 600-17 (rig, skid), 670-18, 750-20 (portable, rig, excavator), 750-25, 777-22, 800-20, 900-18, 900-20, 900-435, 1200-40 |
| Sd emissions builds | H23 Sd S5/T4 APP; H32 Sd S5 APP; V21 Sd S5/T4 APP; V28 Sd S5/T4 APP; V39 Sd S5/T4 APP; X28 Sd S2 APP, X28 STAGE V, X28 T4 APP; Y35 Sd S2/S5 APP, Y35 T4 APP |
| Large portable and drill units | XRVS 1000 CD8 T4F, XRVS 1350 AS, XRVS 1550 T4F; XRX 1350; XRH 1100 PLUS; XRV 1200; XRS 680-290 and XRS 750-250 skid; TWINAIR+ 2800 |
| Wuxi CKD packages | NJ PKD and PKD airend platforms; JK, GD, SY, XG, ZL, SW, KS CKD packages from 18 to 43 m³/min at 20 to 30 bar |
The X-AIR Portable Range
The X-AIR and X-AIR+ machines are the portable oil-injected workhorses of the range, and the official documentation ties the 1810028290 to them from the compact 550-17 up to the 1200-40. The list covers the rig, skid and excavator variants of the 600-17 and the portable, rig and excavator variants of the 750-20, so the same stage follows the platform across its mounting formats.
For a rental fleet or a contractor running mixed X-AIR units, one stage number across that spread simplifies the spares shelf: one identification, held once, fitting the whole family line.
The Sd Emissions Builds
The Sd builds carry the emissions packages: Stage V, T4 and the S2 to S5 ratings across the H23, H32, V21, V28, V39, X28 and Y35 families. The official documentation names the 1810028290 for each of them as the APP-listed stage.
These are the machines where emissions rules decide the build, and the element underneath does not change with the badge: the same J-35 stage serves the S5, the T4 and the Stage V variants of a family.
Large Portable and Drill Units
The big end of the coverage takes the same stage: XRVS 1000 CD8 T4F, XRVS 1350 AS and XRVS 1550 T4F, the XRX 1350, the XRH 1100 PLUS, the XRV 1200, the XRS skid units and the TWINAIR+ 2800. These are high-output machines for drilling and heavy site air, where the element is the component the whole output rests on.
That the 1810028290 covers both the compact X-AIR units and the XRVS class is the clearest sign of how central the J-35 stage is to the mobile programme.
The Wuxi CKD Platform
The documentation also lists the Wuxi-built CKD packages: the NJ PKD and PKD airend platforms and the builder packages from 18 to 43 m³/min at 20 to 30 bar. These machines leave the factory under other brands, and the 1810028290 is the stage inside them.
For the owners of those units the route to a renewal runs through the same number as for the badged machines, which is why the stage is confirmed from the machine record rather than from the brand on the canopy.
Why Fitment Is Confirmed per Machine
A coverage list this wide makes the per-machine check more important, not less. Family membership does not settle fitment: which stage a given build takes depends on its generation and configuration, and the parts list for the serial number is the record that settles it.
That is why the 1810028290 is confirmed from the machine nameplate and the old stage number together. Two machines under the same family name can sit on different stage numbers, and the check is what keeps the wrong box off the workshop floor.
What the Oil-Injected Screw Element Does
Oil-injected compression starts from a condition the J-35 is built around: oil is fed into the compression chamber of the 1810028290 and does three jobs at once — it seals the running clearances, it lubricates the rotors and it carries heat away.
The Oil Film and the Rotor Pair
The rotor pair turns in a precision-bored housing with the oil film sealing the gaps between the lobes, so the pockets hold pressure as they travel from the inlet to the discharge port. Because the oil carries the sealing and the cooling, the stage runs cooler than a dry chamber would and the rotors ride in a protected environment.
Precision rolling bearings take the radial and thrust loads of the shafts, and the oil separated out downstream returns to the circuit. Everything about the air path after the stage — separators, filters, dryers — is sized around the oil that the 1810028290 injects, which is why a stage in good condition is also an oil-carry-over decision.
A Complete Factory Assembly
The 1810028290 is renewed as a complete unit rather than rebuilt in place. The rotor pair, the housing and the bearings arrive as one factory assembly with the ports and the drive interface set for the machines it serves.
That is what makes the renewal a planned swap instead of a workshop project: the old stage comes out, the new one goes in on its mounting faces, and the machine returns to its log with a fresh serial to record.
Handling the 105 kg Stage
At 105.00 kg and 67 × 49 × 51 cm, the 1810028290 is a two-person-and-gear lift: heavier than the compact stages, far below the crane-only class. The figures describe the unit as it is supplied, and they shape the route from the unloading point to the machine.
Dimensions and Moving Plan
The 67 × 49 × 51 cm envelope reaches the machine on a pallet, and the openings it has to pass are measured in advance: doorway widths, lift capacity and the standing room in front of the machine. A hoist or engine crane rated for the 105.00 kg of the 1810028290 covers the lift, and the slinging keeps the load level through the move.
The stage is carried on its mounting faces and never on its shaft. Port caps stay in place until the moment of fitment, so nothing reaches the bore while the unit is exposed.
Setting Down and the First Run
Before the machine is closed up, the mounting faces are cleaned and checked for burrs, the coupling is inspected for wear, and alignment and direction of rotation are confirmed. Once running, the machine is brought up unloaded and watched while the readings settle.
Discharge temperature, pressure and vibration are logged through the first running period, and fasteners are re-torqued after the first hours. That short log becomes the baseline for every later check on the 1810028290.
Wear Signs and Renewal Timing
Renewal of the 1810028290 is decided on condition rather than on a fixed hour count. Two lines of evidence carry most of that decision, and both read best as trends taken at a fixed interval rather than as single figures.
Possible Warning Signs
The rotor surfaces and the bearings are what change first. As they wear, the running clearances open and the stage delivers less air at the same shaft power, so a falling free air delivery measured at the rated pressure is the reading that follows that change. Discharge temperature at a steady load moves with it.
Three further readings carry the same story:
- More power drawn for each unit of air delivered at a steady load, which separates a worn 1810028290 from a machine whose demand has changed.
- Vibration at the bearing housings, read at a fixed interval so the level forms a trend rather than a single figure.
- Rising oil carry-over downstream, which moves with the internal condition of the stage and shows up at the separator first.
Timing the Renewal
Left unchecked, bearing wear can end with the rotors contacting, and at that point the stage is written off rather than renewed. A planned renewal avoids that outcome, because the unit is changed while the frame, the drive and the pipework are still in good order.
The serial recorded in the machine file is what makes that timing judgement easier, since it ties the readings to a known stage rather than to a model in general.
Ordering the 1810028290 Through Seadweer
Two pieces of information lock the order down: the number on the stage being renewed — whether it reads 1810028290, 1810028280 on the plate, or any of the six earlier numbers in the chain — and the model and serial number from the compressor nameplate.
Machine Record Check
Send both to Seadweer and the parts desk checks the number against the machine record and confirms the 1810028290 in one pass, whichever of the seven references the file carries. Where the number on the old stage has worn away, the nameplate is enough on its own, because the parts list for the machine names the stage it was built with.
Fleets that run several compressors keep a short record for each machine: model, serial number and stage number. That record turns the next enquiry into a single message with a confirmed answer, and it is the same record the parts desk works from when the 1810028290 is quoted.
What the Quotation Confirms
The quotation repeats the item data of the 1810028290: the O.I.S. J-35 designation, the packed size, the weight, the country of origin and the tariff code. One confirmation covers the whole renewal, so the workshop plans the lift and the stop without a second enquiry for the same stage.
Send the machine details with the enquiry and the answer comes back with the fitment already checked. That is the whole of the ordering process for a 1810028290 renewal.
Technical Specifications
The tables below collect the identification data and the physical figures recorded for the 1810028290.
Part Identification
| Item number | 1810028290 |
| Designation | O.I.S. J-35 SERVICE ELEMENT |
| Printed form | 1810 0282 90 |
| Production number (housing plate) | 1810028280 |
| Supersedes | 2934998823 and five earlier numbers |
| Compression type | Oil-injected rotary screw |
Dimensions and Weight
| Dimensions (L × W × H) | 67 × 49 × 51 cm |
| Weight | 105.00 kg |
| Country of origin | Belgium |
| Customs tariff code | 8414900090 |
The 105.00 kg weight and the 67 × 49 × 51 cm envelope describe the 1810028290 as it is supplied, and they set the handling plan for the fitting day. Seadweer confirms the current package details with the quotation.
FAQ
What is the 1810028290?
The 1810028290 is the O.I.S. J-35 SERVICE ELEMENT, the oil-injected screw element Atlas Copco lists across its mobile fleet, from the X-AIR portable range to the XRVS class and the Wuxi CKD packages. It is a complete factory assembly renewed as a unit rather than rebuilt in place.
What is the difference between 1810028290 and 1810028280?
They name one and the same stage. 1810028280 is the production number on the housing plate, and the 1810028290 is the reference the parts records and orders are written against.
My machine file carries an old number — which one is current?
Atlas Copco lists the 1810028290 as the newest version of six numbers: 1616691191, 1616709891, 1616725890, 1616761280, 1616761290 and 2934998823. Any of them resolves to this stage, and the order is placed against the current one.
Which compressors take the 1810028290?
The official documentation covers the X-AIR and X-AIR+ portable range, the Sd emissions builds of the H23, H32, V21, V28, V39, X28 and Y35 families, the XRVS, XRX, XRH, XRV and XRS large units, and the Wuxi CKD packages.
How heavy is the 1810028290?
The item data lists 105.00 kg in a 67 × 49 × 51 cm package, so the move is planned with lifting gear rated for that mass. The 1810028290 is carried on its mounting faces and never on its shaft.
How do I order a renewal for my compressor?
Read the number on the stage being renewed and note the model and serial number from the compressor nameplate. Send both to Seadweer and the fitment is confirmed against the parts list for that machine before the order is placed.
More Air Compressor Parts List
If you are looking for other Atlas Copco air compressor parts, further models are listed in the table below. Have a look, or get in touch with us for details.
| Part Number | Part Name | Part-Number |
|---|---|---|
| 1901002721 | ASSEMBLY BACK CYL. HEAD D320HN | 1901-0027-21 |
| 1901002725 | BACK CYLINDER HEAD – ASSEMBLY | 1901-0027-25 |
| 1901002726 | HEAD END CYLINDER HEAD D140 | 1901-0027-26 |
| 1901002728 | BACK CYLINDER HEAD ASSEMBLY | 1901-0027-28 |
| 1901002731 | ASSEMBLY FRONT CYLINDER HEAD | 1901-0027-31 |
| 1088049805 | GASKET | 1088-0498-05 |
| 2906092700 | GA132/160 HD 8000HR | 2906-0927-00 |
| 1901618056 | TUBE BUNDLE X1 | 1901-6180-56 |
| 2202719600 | MIN.PRESS.VALVE 2+ | 2202-7196-00 |
| 1080430092 | MOTOR 13,2KW 230V 60 | 1080-4300-92 |
| 0502109266 | BEARING | 0502-1092-66 |
| 1625163286 | B TYPE FLEXIBLE | 1625-1632-86 |
| 1630800070 | LUCHTFILTER DMF 30X1 | 1630-8000-70 |
| 1503822300 | CONTACTOR | 1503-8223-00 |
| 2204217511 | LABEL SERV.ROTAIR 30-35HP A1 | 2204-2175-11 |
| 1639623007 | 2204011100 TG-WSS301 0-200C | 1639-6230-07 |
| 1627002480 | FRAME MED 70-145 | 1627-0024-80 |
| 1621870710 | COMPRESSOR CORE | 1621-8707-10 |
| 8092292815 | ES6 IEC | 8092-2928-15 |
| 1614734008 | COOLER-OIL | 1614-7340-08 |
| 0650129200 | GASKET-FLG | 0650-1292-00 |
| 2200640568 | SEP OLIO 493 | 2200-6405-68 |
| 1604147201 | PIPE | 1604-1472-01 |
| 2200630533 | GASKET | 2200-6305-33 |
| 1623776700 | STUD | 1623-7767-00 |
| 2200557130 | MOTORE EL.HP10 P2GR112V400/50 | 2200-5571-30 |
| 0147196044 | SCREW | 0147-1960-44 |
| 1088005113 | END SOCKET | 1088-0051-13 |
| 1629913107 | PIPE | 1629-9131-07 |
| 1622939009 | ROOF RAIN PROTECTION | 1622-9390-09 |
| 0108129000 | PIN-SPRING | 0108-1290-00 |
| 2914042000 | DRUM | 2914-0420-00 |
| 1612269200 | COOLER-OIL | 1612-2692-00 |
| 1622223402 | FLOW INDICATOR | 1622-2234-02 |
| 1625743800 | PLATE | 1625-7438-00 |
| 2200902521 | SPARE A2 7021 ECD 2200981931 | 2200-9025-21 |
| 1629949385 | FLEX HOSE | 1629-9493-85 |
| 1623490500 | STAY | 1623-4905-00 |
| 1637901100 | GEARBOX | 1637-9011-00 |
| 6996012605 | HOSE, 1+, 120 cm, 0x0 | 6996-0126-05 |
| 1903108608 | GASKET | 1903-1086-08 |
| 2204195732 | SERVICE PORT ID365-525 | 2204-1957-32 |
| 1621605200 | PIPE | 1621-6052-00 |
| 9828414105 | CUBICLE 5,5-7,5HP 230/3/50 DOL | 9828-4141-05 |
| 1202738400 | GASKET | 1202-7384-00 |
| 1002257600 | YOKE | 1002-2576-00 |
| 2205554028 | BEAM ASSY C90 LU30-45 | 2205-5540-28 |
| 2230600001 | COMP. INTERFACE BOX CIB | 2230-6000-01 |
| 1625841501 | SET RAINPORTECTION | 1625-8415-01 |
| 2205135102 | ELECTRIC MOTOR 230V/60HZ | 2205-1351-02 |
Pieter van Dalsen –
Our fleet files carried three different element numbers across the same machines, and every enquiry used to start with an argument about which one was current. This time we sent the compressor serials and Seadweer answered with the full chain: every old number pointed to the 1810028290. The stage arrived at 105 kg with the plate matching the machine file, went into the first unit without a single clarification email, and the run-in readings sat where a new stage should sit. One number for the whole fleet is worth more than the part itself.