Description
The 1616740990 is the OIS M-08 SERVICE stage, the oil-injected screw element Atlas Copco documents for the C146 platform. Its record spans two machine families at once: the GA 90+, GA 110, GA 110+, GA 132 and GA 132+ stationary compressors, and the G 110, G 132 and G 110 VSD units of the G range.
The stage carries two current numbers, not an old one and a new one. The item record names it 1616740990, and the production side of the same stage carries 1616740980 under the designation OIS M-08 C146. At 230.00 kg and a 75 × 44 × 43 cm envelope, the renewal is a lifting-gear job, and the figures are published so the lift can be planned before the order is placed.
This article sets out what the M-08 designation covers, how the two numbers pair, which machines the parts lists name, and where the documented range ends.
Identity of the 1616740990 Element
An element is the core compression stage of a screw compressor, and the 1616740990 fills that role as the M-08 stage of the C146 platform. 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 of that assembly are set by the machines it was built for, which is why the 1616740990 is confirmed against a compressor record rather than against a description.
What the OIS M-08 Designation Covers
OIS is the oil-injected screw designation, and M-08 is the stage code Atlas Copco records for this element. The service record carries the name OIS M-08 SERVICE, and the production record carries OIS M-08 C146; the C146 tag is the platform code that ties the stage to the element sections of the GA and G parts lists alike.
Atlas Copco prints the number in two forms. The ten-digit form 1616740990 is what the item record carries, and 1616 7409 90 is the printed form used across the parts documents. Both name the same stage, and either one works when a renewal is being confirmed.
The Production Number and the Service Number
The two numbers of this stage describe two sides of the same unit. 1616740980 is the production number, the reference stamped against the build and the one the factory documentation tracks; 1616740990 is the service number, the reference the parts records and orders are written against.
Unlike a superseded reference, neither number is retired: the pair is current, and a machine file can carry either one depending on which document it quotes. Seadweer confirms the pairing against the parts records when an enquiry is handled, so a fitter reading one number and a planner quoting the other always land on the same stage.
Machines Documented for the 1616740990
Atlas Copco’s official parts lists record the M-08 stage across the GA and G ranges in three groups, collected in the table below and taken in turn afterwards.
| Group | Documented units |
| GA series, 13.8 and 14 bar builds | GA 90+, GA 110, GA 110+, GA 132, GA 132+ |
| G series, C146 section | G 110, G 132 |
| G series VSD | G 110 VSD |
The GA Series Records
The element sections of the GA parts lists name the stage directly. The documentation for the GA 110 and GA 110+ at 13.8 and 14 bar lists 1616 7409 90 as the service stage at ref. 1010, and the equivalent record for the GA 132 and GA 132+ carries the same listing. The GA 90+ and the plus builds of the two larger frames appear with 1616 7409 80, the production number of the same C146 stage.
For a plant running several of these frame sizes, one stage reference across the group simplifies the spares position: one identification, held once, covering the whole set.
The G Series and the C146 Section
The G range documentation carries a C146 element section, and the 1616740990 stage sits inside it. On the 50 Hz side the section covers the G 110 at 7.5, 8.5, 10 and 14 bar and the G 132 at 14 bar; on the 60 Hz side it covers the G 110 at 100, 125, 150 and 200 psi and the G 132 at 200 psi.
The pressure spread matters less than the structure it shows: the same stage serves the G fleet across its standard configurations, so a mixed G 110 and G 132 site draws one element reference for both.
The G 110 VSD Record
The VSD documentation for the G range has its own element section for the G 110 VSD, and it lists 1616 7409 80, the production number of this stage. The variable-speed drive changes how the machine modulates, and the element underneath stays the M-08 position of the C146 platform.
That listing makes the G 110 VSD the documented VSD member of the coverage, confirmed from its own parts list rather than inferred from the fixed-speed records.
A Field Record for the GA 90+
Beyond the parts lists, the GA 90+ coverage is backed by an equipment record from an operating gas company: a GA 90+ unit documented with element part number 1616 7409 80, element serial AIA 1876114, made by Atlas Copco Belgium. That is the stage identified on a real machine in service, not a list association.
The field record and the parts list point the same way, and together they make the GA 90+ the most firmly documented position of the 1616740990.
Where the Documented Range Ends
The C146 platform is wider than this stage, and the same parts lists show where it switches. The G 160 and the mid-pressure G 132 builds name 1616 7345 80 as their service stage, and the G 132 VSD and G 160 VSD name 1616 7345 82. Those positions sit outside the 1616740990 coverage by the manufacturer’s own documentation, not by inference.
That is also why the range is not widened to the GA 160 or the VSD+ builds of the GA series: no parts list in hand names the M-08 stage for them, and coverage follows the parts list for each serial number. The check against the machine nameplate and the old element number is what keeps the right stage matched to the right frame.
What the Oil-Injected Screw Element Does
Oil-injected compression starts from a condition the M-08 is built around: oil is fed into the compression chamber of the 1616740990 and does three jobs at once — it seals the running clearances, it lubricates the rotors and it carries heat away.
Sealing, Lubrication and Cooling in One Circuit
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 1616740990 injects, which is why a stage in good condition is also an oil-carry-over decision.
Renewed as One Assembly
The 1616740990 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 230 kg Stage
At 230.00 kg and 75 × 44 × 43 cm, the 1616740990 sits in the lifting-gear class: above any manual handling, well within the reach of a workshop gantry or an engine crane rated for the mass. The figures describe the unit as it is supplied, and they shape the route from the unloading point to the machine.
Lifting and Access
The 75 × 44 × 43 cm envelope reaches the site packed, and the openings it has to pass are measured in advance: doorway widths, gantry height and the standing room in front of the machine. A gantry or crane rated for the 230.00 kg of the 1616740990 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 1616740990.
Wear Signs and Renewal Timing
Renewal of the 1616740990 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.
Readings That Track Wear
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 1616740990 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.
Planning 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 1616740990 Through Seadweer
Two pieces of information lock the order down: the number on the element being renewed — whether it reads 1616740990 or the production number 1616740980 — and the model and serial number from the compressor nameplate.
What to Send
Send both to Seadweer and the parts desk checks the number against the machine record and confirms the 1616740990 in one pass. Where the number on the old element has worn away, the nameplate is enough on its own, because the parts list for the machine names the element it was built with.
Plants that run several GA and G machines keep a short record for each unit: model, serial number and element 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 1616740990 is quoted.
What the Quotation Confirms
The quotation repeats the item data of the 1616740990: the OIS M-08 SERVICE 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 1616740990 renewal.
Technical Specifications
The tables below collect the identification data and the physical figures recorded for the 1616740990.
Part Identification
| Item number | 1616740990 |
| Designation | OIS M-08 SERVICE |
| Printed form | 1616 7409 90 |
| Production number | 1616740980 (OIS M-08 C146) |
| Stage platform | C146 |
| Compression type | Oil-injected rotary screw |
Dimensions and Weight
| Dimensions (L × W × H) | 75 × 44 × 43 cm |
| Weight | 230.00 kg |
| Country of origin | Belgium |
| Customs tariff code | 8414900090 |
The 230.00 kg weight and the 75 × 44 × 43 cm envelope describe the 1616740990 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 1616740990?
The 1616740990 is the OIS M-08 SERVICE stage, the oil-injected screw element of the C146 platform, documented for the GA 90+, GA 110, GA 110+, GA 132 and GA 132+ and the G 110, G 132 and G 110 VSD. It is a complete factory assembly renewed as a unit rather than rebuilt in place.
What is the difference between 1616740990 and 1616740980?
They name one and the same stage. 1616740980 is the production number, and the 1616740990 is the service reference the parts records and orders are written against. Both are current.
Which compressors take the 1616740990?
The documented coverage is the GA 90+, GA 110, GA 110+, GA 132 and GA 132+ at the 13.8 and 14 bar builds, the G 110 and G 132 in the C146 section, and the G 110 VSD. Fitment for a specific machine is confirmed from its serial number record.
Does the G 160 or the G 132 VSD take the same element?
No. The same parts lists name 1616 7345 80 for the G 160 and the mid-pressure G 132 builds, and 1616 7345 82 for the G 132 VSD and G 160 VSD. Those frames sit outside the 1616740990 coverage.
How heavy is the 1616740990?
The item data lists 230.00 kg in a 75 × 44 × 43 cm envelope, so the lift is planned with a gantry or crane rated for that mass. The 1616740990 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 element 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 Parts We Can Supply
If other Atlas Copco air compressor parts are needed, more models are shown in the table below. Check it, or reach out to us and we will assist you.
| Part Number | Part Name | Part-Number |
|---|---|---|
| 1616740891 | ELEMENT | 1616-7408-91 |
| 1616738791 | SPARE ELEMENT AQ15-30VSD | 1616-7387-91 |
| 1616738290 | ELEMENT C80 I-01 | 1616-7382-90 |
| 1616747263 | OFSI-26 | 1616-7472-63 |
| 1616747281 | O.F.S. I-41 | 1616-7472-81 |
| 1639000055 | CORNER | 1639-0000-55 |
| 2202261010 | MOTOR HP7,5 P2 B14 230 | 2202-2610-10 |
| 1628229200 | VALVE SAFETY | 1628-2292-00 |
| 2205260602 | COVER | 2205-2606-02 |
| 1621677400 | PIPE | 1621-6774-00 |
| 1901090026 | PLASTIC TUBE | 1901-0900-26 |
| 2205481604 | CONTROL | 2205-4816-04 |
| 2205013212 | CUB 20HP 440V P VSD BD 9002 | 2205-0132-12 |
| 1621052504 | GEAR WHEEL | 1621-0525-04 |
| 2906653100 | CONTACT SET | 2906-6531-00 |
| 1617429000 | SOL.VALVE | 1617-4290-00 |
| 0989422012 | GROMMET | 0989-4220-12 |
| 1096000740 | PIPE | 1096-0007-40 |
| 2203083210 | COMP.EM55HHR 115/60 R134 RSIR | 2203-0832-10 |
| 2901107650 | COUPLING KIT GBD C14 | 2901-1076-50 |
| 2252545200 | WASHER | 2252-5452-00 |
| 1310031055 | STAY | 1310-0310-55 |
| 2205117165 | FAN CARDO | 2205-1171-65 |
| 1310039400 | PANEL | 1310-0394-00 |
| 1310149600 | EYE-HOOK | 1310-1496-00 |
| 1617265800 | CAPILLAR CONN.(L=1700MM) | 1617-2658-00 |
| 1613953680 | BAFFLE ASSEMBLY | 1613-9536-80 |
| 1202702700 | LABEL | 1202-7027-00 |
| 1900239201 | 55KW 400V 50HZ A2 | 1900-2392-01 |
| 1901008759 | CRANKCASE HN2 ASSY | 1901-0087-59 |
| 1092002946 | OIL TANK | 1092-0029-46 |
| 1625179038 | V-BELT | 1625-1790-38 |
| 1622464001 | SUPPORT | 1622-4640-01 |
| 0575035134 | HOSE ASY | 0575-0351-34 |
| 2202831604 | LABEL EL.EQUIPMENT | 2202-8316-04 |
| 1623639684 | PANEL | 1623-6396-84 |
| 2252037400 | GASKET | 2252-0374-00 |
| 1901079653 | SUCTION VALVE CYL. D140 | 1901-0796-53 |
| 1622369239 | GEAR DRIVE | 1622-3692-39 |
| 0196344100 | SCREW | 0196-3441-00 |
| 1901042357 | copper gasket | 1901-0423-57 |
| 1622307425 | DECAL | 1622-3074-25 |
| 2235671202 | QUICK COUPLING | 2235-6712-02 |
| 1622698879 | GEAR SET 25/26 | 1622-6988-79 |
| 1621324813 | AFTERCOOLER | 1621-3248-13 |
| 1900224310 | CAB22V2 500-575V | 1900-2243-10 |
| 2205466600 | BEARING | 2205-4666-00 |
| 6214329900 | THERMOMETRE A CAPILLAIRE | 6214-3299-00 |
| 1630800611 | ELEMENT M0450 | 1630-8006-11 |
| 1092299135 | TUBE | 1092-2991-35 |
Rubén Ortiz –
Our plant runs the GA 132 next to a pair of G 110 units, and the old files named a different element number for each. Seadweer matched all three to the same M-08 stage and explained why the VSD frames next to them take a different one, which settled the question before it became a mistake. The element arrived at 230 kg on a skid that matched the published figures, and the crane slot we booked was enough. Clean answer, clean fitment.