Sullair Industrial Air Compressor 5512

Warning: This procedure requires trained personnel with PPE!

Enter the machine's hour meter reading

Enter the date of the last hose replacement

If machine is air-cooled, order hose kit 02250171-102. If machine is water-cooled, order hose kit 02250171-103.

Sign off on the hose replacement

Warning: Always ensure the compressor is turned off and fully depressurized before starting maintenance.

Is the compressor fitted with the standard solenoid condensate drain valve?

If the compressor is not fitted with the standard solenoid condensate drain valve, stop the procedure and report to the maintenance team.

Remove the knurled cap from the strainer.

If the screen is damaged, the strainer assembly must be replaced (P/N 02250171-245).

CAUTION: Do not mix different types of lubricants. Mixing lubricants can cause malfunctions or compressor damage and will void the compressor’s warranty.

CAUTION: Contamination of compressor fluids with mineral oil or other fluids can cause foaming, filter plugging, or orifice line obstruction.

Sullair encourages its customers to participate in a fluid analysis program with the fluid suppliers. In some cases, the analysis results suggest a fluid change interval that differs from the User Manual. Contact a Sullair representative for details.

When performing a fluid change or topping off the fill, the proper level should be at half of the sight glass, with the machine off.

Mixing, changing, or adding other lubricants within the compressor unit may void the air-end warranty.

Change the compressor fluid using instructions shown in the Lubrication Guide.

Refer to Figure 3-1 for the fluid fill port location.

Sullair’s 4500P-7500 series compressors are filled and tested at the factory with Sullube lubricant.

Warning: This maintenance should be performed along with that of the fluid filter.

Disconnect the tube at the bottom of the sight glass

Unscrew the sight glass assembly where the elbow fitting joins the strainer/filter

Remove the used filter assembly and replace it with the new assembly

Inspect and clean the orifice inside the sight glass blocks. Remove the orifice with an Allen wrench

Coat/lubricate the O-rings with silicone grease

Reattach the connectors to the sight glass/orifice blocks

Sign off on the fluid return/sight glass maintenance

The compressor unit and motor are rigidly connected through the mounting adapter housing.

This arrangement makes coupling alignment unnecessary.

The coupling is a jaw type in shear. If the elastomeric (rubber) element requires replacement due to wear or damage, order a replacement element and perform the following steps:

1. Remove the protective grill from the adapter housing.

2. Loosen the retaining screw located on the outer sleeve. Slide the sleeve to one side, exposing the coupling element.

3. Unwrap the coupling element from the coupling jaws.

4. Install the new element by wrapping it around the jaws, engaging the cogs on the element into the jaws.

5. Reinstall the outer sleeve and secure by tightening the two screws to 45 in·lbs (5 Nm).

6. Reinstall the protective grill.;