Sullair Portable Air Compressor 750H

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.

Refer to Figure 5-4. Air filter maintenance should be performed when indicated on instrument panel. The air filters are both equipped with a primary element and secondary element each.

The secondary element must be replaced after every third primary element change. DO NOT reconnect the secondary element once it is removed.

1. Clean the exterior of the air filter housing.

2. Remove the cover/element assembly by loosening the wingnut securing the cover/ element assembly.

3. Remove the cover/element assembly from the housing by unscrewing the wingnut.

4. Clean the interior of the housing by using a damp cloth. DO NOT blow out dirt with compressed air as this may introduce dust downstream of the filter.

5. When it becomes necessary to remove the secondary element, pull the element out of the housing.

If Sullair AWF® is used, proceed with the following steps

Compressor fluid change procedure

Has the compressor been warmed up for 5 to 10 minutes?

Is the compressor off and all internal pressure relieved?

Has the fluid been drained by opening the appropriate drain valve?

Has the valve been closed when draining is complete?

Has the compressor fluid been changed and the fluid filter element replaced?

6.3 Noise emissions maintenance and maintenance record log

Muffler(s) and engine exhaust system securely mounted?

All joints and connections are tight in the muffler and exhaust system?

Air filter(s) and air inlet system securely mounted?

All joints and connections are tight in the air filter and air inlet system?

No leaks in the air filter and air inlet system?

Engine vibration mounts securely attached?

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