Sullair Portable Air Compressor 1050

Clean the return line orifice and strainer

Repack the wheel bearings on wheel-mounted units

Sign off on the 1000 hourly compressor maintenance

If not using Sullair AWF®, change the compressor fluid and replace the fluid filter element.

Compressor shut off and system pressure relieved?

Suitable container positioned beneath the elements to catch fluid drainage?

Elements removed using a suitable tool?

Each element rotated counterclockwise to remove?

Refer to Figure 5-5. Prior to adjusting the control system, it is necessary to determine the desired operating pressure range as well as the maximum pressure at which the machine is to operate. This pressure must not exceed the maximum operating pressure which is stamped on the machine serial number plate.

Start the machine and let it warm-up and enter full 'RUN' mode.

Open service valve slightly until engine tries to speed up. Slowly close the service valve.

With service valve closed, check and adjust the pressure at the reducing regulator to a minimum of 60 psig (4.1 bar) and not to exceed 75 psig (5.2 bar).

With service valve still closed, and the 'HI/LO' switch in the 'LO' position, adjust the low-pressure back-pressure regulator so the service pressure is between 115 to 125 psig (7.9 to 8.6 bar) with the engine at 1400 rpm.

Open the service valve to load the compressor to maintain 100 psig (6.9 bar) discharge pressure. Operating speed should be 1800 RPM on the instrument panel. If not, repeat step, but adjust the unload service pressure up or down as needed until 100 psig (6.9 bar) is maintained when engine speed is 1800 rpm.

For 150 psig (10.3 bar) 'H' machines, turn the 'HI/LO' switch to 'HI' position. Close the service valve and set the 'HI' pressure control regulator to maintain 165 to 175 psig (11.4 to 12.1 bar) discharge pressure.

Open the service valve to maintain 150 psig (10.3 bar) and check for 1800 RPM full-load speed. If lower speed is observed, raise the setting of the low pressure control regulator until rated speed is achieved.

For 175 psig (12.1 bar) 'HH' machines, turn the 'HI/ LO' switch to 'HI' position. Close the service valve and set the 'HI' pressure control regulator to maintain 190 to 200 psig (13.1 to 13.8 bar) discharge pressure.

Check fan belt tension and adjust if needed.

Clean the radiator and cooler exterior.

Depending on how contaminated the atmosphere may be, more frequent cooler and radiator cleaning may be necessary.

Check Engine Operator's Manual for required service.

Sign off on the 250 hourly compressor maintenance

CAUTION: DO NOT remove caps, plugs and/or other components when compressor is running or pressurized. Stop compressor and relieve all internal pressure before doing so.

Inspect for leaks, loose or missing parts, damaged parts or parts out of adjustment.

Inspect for torn, frayed, blistered or otherwise deteriorated and degraded hoses.

Check the fluid level in the compressor receiver tank.

Drain water from the fuel/water separator.

Check the fuel level in the fuel tank.

Check the engine coolant level.