Atlas Copco 1616869393=1616869383 C142 M-13 Oil-Injected Screw Element

Description

The 1616869393 is the C142 M-13 element, the oil-injected screw stage fitted in the GA 75, 75L, 90 and 110 VSD+ machines with permanent-magnet drive. Its designation belongs to a system of its own: within the Atlas Copco oil-injected range, element models are organized under C-numbers — C67, C77, C80, C106, C142, C146, C190 and their neighbors — each C-number naming one element model, and the letter-number pair after it placing the size within the model.

C142 M-13 therefore identifies this stage twice over: as the C142 element model, and as its M-13 size. The element measures 62 x 52 x 51 cm and weighs 237.7 kg, a mid-heavy package that carries the full compression duty of machines in the 75-110 kilowatt class.

This page records the identification and physical data for the 1616869393, explains how the C-number system and the two ordering references fit together, and describes what the renewal of an element this size involves — from the wear signals in the machine’s data to the handling of a 237.7 kg stage. It is written for the maintenance planner and the parts buyer looking after GA 75-110 class machines.

Reading the C-Number System

Atlas Copco uses two parallel naming systems across its oil-injected elements, and the C142 M-13 sits in one of them. The OIS designations — with their letter-number size classes — name the family and size; the C-numbers name the element model itself, the way a machine platform carries a model code.

Both systems are current in the field, and a single machine’s documentation uses one or the other: the parts list carries C142 M-13, while a quotation for the same stage carries the complete ordering number, and older service paperwork switches between the two. Knowing that these are layers of the same identification — model, then size, then ordering number — turns any of those documents into a starting point rather than a puzzle, because each layer resolves onto the 1616869393 that the order actually needs.

Production number

The 1616869393 also carries a second ordering reference, 1616869383, the production number recorded in the machine’s parts list from the factory. The two numbers follow the service-system pattern that runs through the whole range: production numbers live in the machine documentation, service numbers live in the ordering channel, and both point at the same physical element. Whichever one a document shows, the element is identified the moment the number arrives together with the machine details — and the pairing is worth recording in the maintenance file the first time it is resolved, so the next reader does not resolve it again.

Ordering

For ordering, the 1616869393 is the number that keys the quotation, the order confirmation and the supply documentation. Quoting it in the first message — ideally with the plate photograph from the old element and the nameplate details of the machine — closes the identification in one pass and puts the order on the correct reference from the start.

Technical Specifications

The tables below list the data recorded for the 1616869393 as supplied through the service channel.

Part Identification

Dimensions and Weight

Each 1616869393 leaves the factory serialized, and the number on the plate ties the physical element to its documentation through installation and every service event after it. For machines of this class the plate photograph is worth taking at every service stop: when the renewal is planned, the photograph and the maintenance file together state exactly which element is fitted, when it went in, and what the handling plan will need to move.

The Element Behind the Permanent-Magnet Drive

The C142 M-13 serves the GA 75, 75L, 90 and 110 VSD+ machines, where the compression element works together with a permanent-magnet drive train. The compression principle is the oil-injected screw cycle: air enters the inlet, the meshed helical rotors reduce its volume as their chambers turn, and oil injected into the chamber seals the rotor clearances and absorbs the heat of compression. The oil leaves with the air, is separated and cooled in the machine’s circuit, and returns to injection — a closed loop that puts the lubricated components on the oil side of the air path, separated by shaft seals.

That closed loop is also why the element and the machine’s oil circuit are serviced as one system: the condition of the 1616869393 and the condition of the oil it runs on move together through the machine’s life.

The rotors run in a non-contact gap across their working surfaces, and the components that carry the loads — bearing sets and shaft seals — are the ones that age. In machines of this class the duty is continuous and the annual hours are high, so the element’s condition is a live variable in the plant’s energy account, not a background fact. The 1616869393 is renewed as a complete factory-set assembly: rotors, bearings and seals arrive in place with the clearances set, so the exchange restores the whole internal condition of the stage in one operation rather than rebuilding it in the field.

Wear Signals at This Duty Level

An element in the GA 75-110 class announces its wear through the machine’s logged data, and the readings are the same ones the service team knows from the whole oil-injected range. Free air delivery slips against the same power input. Specific power climbs — more kilowatt-hours per cubic meter of air. Discharge temperature drifts upward as the internal clearances leak, and noise or vibration at the air end sharpens as the bearing clearances grow. On the VSD+ machines this element serves, the drive’s speed profile adds a signal of its own: as the 1616869393 wears, the drive runs higher to hold pressure, and the logged speed climbs month over month.

The trend line is what separates an element fault from a system fault. Coolers, separators and filters are ruled out first; a step change after a cooling fault tells a different story from a slow climb across quarters, and the log distinguishes the two. When the trend points at the element, the 1616869393 goes on order while the service window is being set, and the two are ready together. Running a worn element of this size to failure is the outcome to rule out — internal contact finishes the rotor profiles and turns a planned exchange into a repair, with the machine down for far longer than any window.

Renewed on condition, the 1616869393 comes back to rated delivery and specific power inside a single booked window, and the drive’s speed log settles back to where it used to sit.

Handling a 237.7 kg Element

At 237.7 kg, the 1616869393 stands at the edge where hand-powered handling ends and planned lifting begins. A shop crane or engine hoist with the rated capacity moves it, a forklift positions the crate at the machine, and the route — door widths, floor, the space around the compressor — is walked before the window opens. The element stays crated and capped until it stands at its mounting position, so nothing enters the chamber on the way in. This is not the lifting scale of the largest oil-free stages, but it is past the point where improvising saves time; the plan written in advance is what keeps the window short.

The fitting follows the compressor manual: mounting faces cleaned, drive connection aligned, fastener torques set to the manual’s values, oil circuit reconnected. The serial numbers of the old and new elements, with the 1616869393 reference recorded alongside each, go into the maintenance record before the machine is closed up. Fitted this way, the 1616869393 exchange occupies a scheduled service stop measured in hours, and the machine returns to load the same day the calendar said it would — with the new element’s serial opening the next entry in the file.

Ordering the Correct Element

Two details close the identification: the element number and the machine. The 1616869393 is read from the plate on the element being replaced, from the service documentation or from a previous quotation, and the compressor is identified by the model and serial number on its nameplate. Send the pair together and the 1616869393 match is confirmed in one pass — the C-number on the document, the ordering number on the order, and the machine details tying them together.

If the parts list shows the production number 1616869383 instead, send it as it appears: the service reference comes back with the confirmation, and the correct 1616869393 goes on order with the changeover scheduled into the booked window. Either route — 1616869393 from a plate or 1616869383 from a parts list — ends in the same place, and one message with the plate photograph and the nameplate details starts all of it.

FAQ

What does the designation C142 M-13 mean?

C142 is the Atlas Copco element model number — the C-number system that organizes the oil-injected element range alongside the OIS designations — and M-13 places the size within the model. The ordering reference is 1616869393, and that number identifies the part in quotations, order confirmations and the supply documentation.

Which machines does the 1616869393 fit?

The element serves the GA 75, 75L, 90 and 110 VSD+ machines with permanent-magnet drive. The machine nameplate details, sent together with the element number or the plate photograph, are what confirm the match — the machine details and the element reference are checked against each other before any order is placed.

What is the difference between 1616869393 and 1616869383?

They are the two ordering references for the same C142 M-13 element: 1616869393 is the service number used in the ordering channel, and 1616869383 is the production number carried in the machine’s parts list. Send whichever your documentation shows, and the correct reference comes back with the confirmation.

What handling does a 237.7 kg element need?

A shop crane or engine hoist with the rated capacity, a forklift for positioning the crate, and a route walked in advance. The 1616869393 stays crated and capped until it stands at the machine, and the exchange fits inside a scheduled service stop measured in hours.

What happens if a worn element stays in service?

Delivery and efficiency fall first, and on the VSD+ machines the drive hides part of the loss by running higher — which the logged speed profile records month over month. Internal contact at the end of that path finishes the rotor profiles for good. Renewing the 1616869393 on condition restores rated output in one planned operation.

Is the element supplied as a complete assembly?

Yes. The 1616869393 arrives as one factory-set unit with the rotor pair, bearings and shaft seals in place and the clearances set at the factory, so the renewal is an assembly exchange with no on-site internals work. The element is serialized, and the plate number links it to its documentation through installation and service.

More Air Ends Available

Other Atlas Copco air end models are available upon request. Please check the table below or contact us for details.