Sullair Air-Cooled Compressor 10B 40HP-251334-004 AC

Repair pressure regulator valve 250017-280, use repair kit 250019-453

Loosen the locknut and turn the adjusting screw counterclockwise until the inner spring tension is relieved. The adjusting screw should turn freely when the spring tension is relieved

Remove the spring chamber from the body to allow access to internal parts

Remove the spring button and the spring. The dampener will stay inside the spring as it is removed. Leave the dampener inside the spring as there is no need to remove it

After removing the spring, remove the gasket stop and brass gasket

Remove the pressure plate nut and disassemble the pressure plate, diaphragm, diaphragm gasket (rubberized asbestos), seat disc and seat gasket

Remove and discard the seat ring

Reassemble the regulator using the new parts provided in the repair kit

Reassemble the diaphragm, pressure plate, gasket, seat disc, and seat disc gasket and tighten the nut. All of these parts with the exception of the pressure plate are provided in the repair kit

Check the fluid level in the sump. Should the level be low, simply add the necessary amount

Observe the gauges and indicators to be sure they monitor the correct readings for that particular phase of operation

Check on the overall compressor and gauges to assure that the compressor is running properly after it has warmed up

Clean the return line strainer after the initial 50 hours of operation

Clean the return line orifice after the initial 50 hours of operation

Replace the fluid filter element

Replace your fluid filter element and the gasket under any of the following conditions, whichever occur first

Conditions for replacing fluid filter element

To replace fluid filter element:

Using a strap wrench, remove the old element and gasket

Apply a light film of fluid to the new gasket

Hand tighten new element until new gasket is seated in the gasket groove

Warning: This maintenance check requires trained personnel with PPE!

Enter the part number of the coil

Yoke containing the coil and sleeves slipped off the solenoid base sub-assembly?

Reassembled in reverse order of disassembly?

Sign off on the compressor coil maintenance

Replace the piston spring, piston o-ring seal ring, and check valve spring of the onlet valve (P/N 250025-654). Use repair kit number 250019-451

Remove all piping connected to inlet valve assembly

Remove the four (4) capscrews and lockwashers that attach the valve body to the compressor unit and remove from compressor

Remove snap ring and Teflon o --- ring inside valve body

Lift and remove check valve assembly and spring from valve body

Remove piston cap, piston spring, and piston

Clean valve body as needed, making sure all air passages are clear and old seal ring is removed from the inlet body flange

Reassemble the inlet valve using the new parts supplied in the repair kit

Install o --- ring on piston, lightly oil piston, and install in valve body