Atlas Copco 2901191021 Motor Overhaul Kit GA 55+ to 90

Descripción

El 2901191021 is the Atlas Copco Motor Overhaul Kit for the GA 55+ to GA 90 oil-injected screw compressors. The official designation carries the machine range in its own name, MOTOR OVERHAUL KIT GA55+-90, and the kit gathers the bearing, sealing and oil-feed parts for one drive motor overhaul under a single order line.

The kit is recorded under three numbers in the parts system. The earliest reference is 2901191001, followed by 2901191011, and the 2901191021 is the current number an order is placed against today. A machine file written under either earlier reference describes the same kit, and the replacement is supplied as the 2901191021.

What the 2901191021 Motor Overhaul Kit Covers

An overhaul of the drive motor end is not the renewal of one failed part. It renews the bearing positions and the complete shaft seal line together, because the parts that wear in that end of the machine wear as a group: the bearings take the shaft load hour after hour, and the seal lips hold the oil on the bearing side and the dirt out of it. Renewing one without the other leaves the new part running against surfaces that are already on their way out.

The contents recorded on the official part page for the 2901191021 follow that logic:

Bearing and Sealing Lines

The two bearing lines of the 2901191021 carry the load side of the job. The bearing ball and the spherical roller bearing are the pair that takes the radial and thrust loads of the motor shaft, and the spherical roller design tolerates the shaft deflections that a belt- or flange-mounted drive produces in service. The bushing and the circlip locate and retain the rotating parts in their positions.

The sealing side of the 2901191021 runs through the whole set. Two seal lip lines renew the shaft seal positions at the drive end, and the O-rings come in three recorded sizes: the general O-ring line, two of the 130 × 2 size and one of the 7.3 × 2.4 size. Each of them sits at a joint that carries oil on one side, and each is renewed while the motor is open rather than left for the next stop.

The Oil Feed Parts in the Kit

Two oil nozzle lines sit in the 2901191021, and they belong to the lubrication path that feeds the motor bearings on these machines. A nozzle in that path meters the oil that reaches the bearing positions, and its condition matters: a nozzle that has run for years with the oil can score, shift or plug, and the bearing downstream of it loses part of its feed long before anything shows on the outside.

The OIL NOZZLE C106-C111 ELEMENT line is recorded for the element-size group of the same machines, which is why the kit carries two distinct nozzle lines rather than one. The drain nipple completes the oil side. It is the fitting through which the oil drains at the point the service procedure calls for it, and renewing it with the kit removes a reused joint from the job.

These small fittings are exactly the parts that hold an overhaul together. The bearings and the seals get ordered and checked; the nozzles, the nipple and the O-rings are discovered at the bench. Collecting them under the 2901191021 turns that discovery into a checked line at the start of the job.

The Motor Fan Is a Separate Order

The parts record states one boundary of this kit plainly: FOR FAN SEE 9820 6852 00. The motor fan is not inside the 2901191021; it is ordered separately under its own number, and the contents of the kit include a list of the motor fan for spares so the position is identified from the kit paperwork.

For planning, that split matters at the order stage, not at the bench. A workshop that wants the fan renewed in the same stop adds the 9820 6852 00 line to the same enquiry, and both positions arrive matched to the machine beside the 2901191021. Seadweer checks the fan number against the compressor model and serial number together with the kit, so the two lines are confirmed in one pass.

The GA 55+ to GA 90 Machines Behind the Kit

The range is carried in the designation itself: GA55+-90. These are the larger oil-injected screw machines, and on them the drive motor is a substantial unit whose overhaul is planned as its own stop rather than folded into a filter service. The kit number is matched against the machine through the parts list for the serial number, which is the record that fixes the motor build of each unit, and the 2901191021 is the number that parts list shows.

Drive layouts and motor builds differ across the range, and that is why every order for the 2901191021 runs through the model and serial number. A GA 55+ and a GA 90 do not share every motor detail, and the parts list for each serial is what names the overhaul kit and the parts that travel with it.

Working the Overhaul with the Kit

The contents of the 2901191021 are checked in at the bench before the motor is opened, each line against the packing list. The bearing lines deserve a look first: bearings are fitted by their inner rings, never by driving force through the balls or rollers, and a damaged bearing discovered mid-job is the one delay the plan cannot absorb.

The sealing parts are handled with the same care. A seal lip is a precision edge, and it goes in dry of any damage to its own surface; the O-rings are matched to their recorded sizes at their joints. The circlip and the bushing are renewed together with the parts they retain, and the oil nozzles are fitted to their recorded positions so the feed direction of the lubrication path is preserved.

After assembly, the motor is run under observation before the machine returns to load, with bearing noise and temperature compared against the record of the old unit. A short log of those readings, filed with the kit number and the overhaul date, is the baseline the next service interval starts from.

Ordering the 2901191021 Through Seadweer

Two pieces of information lock the order: the number on the kit or machine file, which reads 2901191021, 2901191011 or 2901191001, and the model and serial number from the compressor nameplate. Send both to Seadweer and the parts desk confirms the kit and the parts that go with it, including the fan line where the fan is wanted, in one pass.

Plants that run several machines keep model, serial and kit number together in one record per machine. That record turns the next overhaul into a single confirmed message instead of a new investigation.

Especificaciones técnicas

En las tablas siguientes se recogen los datos de identificación y las características físicas registradas para el 2901191021.

Identificación de piezas

Dimensiones y peso

The 3.402 kg weight and the 26 × 16 × 13 cm box set the handling plan: the kit moves with normal workshop handling, and the bearings inside the 2901191021 stay in their packing until the moment of fitment. Seadweer confirms the current package details with the quotation.

Preguntas frecuentes

What is the difference between 2901191021, 2901191011 and 2901191001?

They are one kit recorded under three numbers from different periods. The 2901191001 is the oldest reference, 2901191011 came after it, and the 2901191021 is the current number an order is placed against today.

Which compressors use the 2901191021 kit?

The designation names the range: the GA 55+ to GA 90 oil-injected screw compressors. The parts list for your machine serial number is the record that confirms the kit and the parts that travel with it.

Does the kit include the motor fan?

The fan is ordered separately under 9820 6852 00, as the parts record states. The kit includes a list of the motor fan for spares, and both lines can be confirmed together against the machine serial number.

What bearing parts are in the 2901191021?

The contents carry the bearing ball and the spherical roller bearing that take the shaft loads, with the bushing and the circlip that locate and retain the rotating parts. The motorbearing and shaft seal sub-kit travels with them as one contents line.

Why does the kit carry two oil nozzles?

The two nozzle lines serve the recorded lubrication positions of the motor, and the OIL NOZZLE C106-C111 ELEMENT line is recorded for the element-size group of the machines. Renewing the nozzles with the overhaul protects the oil feed the new bearings depend on.

How do I order the kit for my compressor?

Read the number on the kit or machine file, which reads 2901191021, 2901191011 or 2901191001, and note the model and serial number from the compressor nameplate. Send both to Seadweer and the fitment is confirmed before the order is placed.

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