GR 1120-1520 Atlas Copco Air End Rebuilding | HP Range 150-250 | Air Engineering Factory Rebuilt

GR 1120-1520 AE
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Call Toll Free: 800-558-4318 within the Lower 48 States

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"Over 100 Years of Experience"
Estimated 2-3 Weeks

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If you have questions, please contact us or call us at 708-498-2925. Since 1962, Air Engineering has been supporting major manufacturing facilities around the world. For more information about Air Engineering, including an aerial tour of our service and parts facility, please visit our about us page.

We truly appreciate how important your plant reliability is to you and thank you in advance for working with us.

*Unless otherwise noted as OEM or by a specific supplier, parts are 100% guaranteed replacement parts. All replacement parts are designed to exact OEM specifications, offering equal to or better performance based on each manufacturer's stringent specifications.

**We have over 200,000 products in our catalog. Although our prices are updated frequently, manufacturer and supplier pricing are constantly changing. After purchase, please wait for final confirmation from our team on delivery and final pricing.


GR 1120-1520 Atlas Copco Air End Rebuilding | HP Range 150-250 | Air Engineering Factory Rebuilt


Units will be disassembled and inspected in the order received.  

If we cannot rebuild the unit there will be no charge to the customer for disassembly and inspection.  Shipping costs are the responsbility of the customer.

Once the airend is received it is unloaded and taken immediately to the disassembly area, which contains a mounting stand, overhead crane and oil pit for collecting waste oil. The job is then assigned a work order number, and a job folder is generated to hold all documents related to disassembly, teardown and dimensional specs. This folder follows the airend through the entire rebuilding process to ensure accurate documentation from start to finish.

The disassembled airend is then placed in one of our selfcontained cleaning systems. After the airend is completely cleaned & degreased, all parts that require work are brought to different areas of the shop and the repairs begin.

If necessary, the following repairs will be made:

4) Seal strips can be built up and recut on our custom jig.

Depending on the extent of the damage, the above work normally takes 1 to 2 days to complete.

All components are then rewashed and taken to the assembly area, where all the bearings, seals, gaskets, and related materials needed to complete the assembly are pulled from inventory. Before assembly takes place all the dimensions are rechecked including the bearing pockets, bores, and alignments. Both rotors are then checked for proper balance and alignment. The new bearings are measured for proper fit before installing.

The airend is then completely reassembled. After assembly the airend is spun unloaded for a final check. To insure that the manufacturers specs are being met, the unit is continually measured and rechecked for accuracy during the entire rebuilding process.

Upon completion, all open ports are plugged with plastic caps and the inlet is sealed shut. The airend is now ready to be skid mounted and painted the original O.E.M. color

As units enter the shipping area, all necessary shipping documents and startup procedures are attached to the unit, and trucking details are arranged. This whole process normally takes 5 to 7 working days, depending on the size of the airend and the 3degree of damage. We have setup our shop so the work flows through on an orderly path to insure that all our inspection steps and quality controls are adhered to.

All rebuilds are backed by our standard oneyear, 8,000 hour warranty or our extended twoyear,16,000 hour warranty. See the airend warranty sheet for details.

Air Engineering warrants all stationary remanufactured air ends to be free from defects in material replaced and labor performed for a period of 1 year from the date of receipt. In order to obtain warranty coverage the distributor must complete and return the warranty registration form within 10 days upon initial start-up . Aditionally the customer must purchase a maintenance kit annually for the unit and participate in the oil analysis program (oil sample kits are part of the maintenance kit).


Air Engineering is not an authorized distributor for any of the manufactures listed. Air Engineering is a source for rebuilding airends and selling parts. 

Air Engineering has been supporting major manufacturing facilities around the world since 1962. The unique approach Air Engineering takes to the industrial air compressor replacement parts market allows it’s clients to increase their profits while maintaining or improving their competitive position in their respective markets


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