Sullair Sullair Air-Cooled Compressor 10B 25HP-251332-004 AC 10B 25HP-251332-004 AC

Warning: This procedure requires trained personnel with PPE!

Adjust Control System with a desired operating range of 115 to 125 PSIG (792 to 862kPa).

Enter the current operating range

Remove cover to pressure switch

Turn the range adjusting screw to the high pressure setting. Turning the screw counterclock-wise lowers both the high and low pressure equally

Turn the differential adjusting screw to the lower (reset) setting. Turning the screw counterclock- wise widens the differential by lowering the reset (lower) setting only

When the pressure switch adjustment is complete, the pressure regulator should be adjusted for the pressure at which modulation of air delivery should begin.

WARNING: Before performing maintenance on the valve, be sure that all pressure has been relieved in the compressor sump, and all downstream pressure has been vented to the atmosphere. Also be sure that the components of the compressor are cool to the touch

Unscrew the minimum pressure/check valve (P/N 241581) from the receiver cover

Remove the hexagonal retaining cap from the main body

Remove the flat washer and heavy spring from the main body

Tap the piston assembly (with a screwdriver) from the bottom of the main body and remove. The o-ring will now be seen easily

Remove the seal ring and discard

Clean piston assembly and valve thoroughly

Replace seal ring and coat the piston and seal with Parker Super “O” Ring Seal or an equivalent quality grease

WARNING: Extreme caution should be used when removing the cap from the body because there is spring tension on the cap

The pipe ends are free of all deep scratches, gouges, dents, etc.

Install the retainer (1), gasket (2), and sleeve (3) on one side of the pipe as shown in Step 1

Install the remaining retainer (4) and gasket (5) on the other pipe end

Position the retainer (4) and gasket to proper pipe insertion depth (“D”)

Slide the sleeve (3) to the gasket (5) and move gasket (2) and retainer (1) into position as shown in Step 2. The pipe MUST be inserted to the proper depth (“D”) into both gaskets

Clean exterior of air filter housing

Remove the air filter cover by loosening the wingnut securing the cover

Remove element and clean interior of housing using a damp cloth. DO NOT blow dirt out with compressed air

Reset the filter maintenance indicator

Sign off on the air filter element replacement

Warning: This maintenance check requires trained personnel with PPE!

Remove the appropriate piping from the thermal valve housing

Remove the four (4) capscrews holding the housing together and separate the upper housing from the lower housing

Remove and replace the element seal in the upper housing

Remove and replace the o-ring between the upper and lower housings

Sign off on the thermal valve maintenance