Sullair Sullair Air-Cooled Compressor 10B 25HP-251335-003 AC 10B 25HP-251335-003 AC

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

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

Replace o-rings and the teflon seat of Blow down valve no.250025-655. Use repair kit no. 250031-772.

Unscrew end caps from the valve body and remove

Hold nut with an appropriate socket wrench and turn screw until loose

Remove all internal parts mounted on the machine screw. Remove the old o-rings and teflon seat and discard

Replace with the new o-rings and teflon seat provided in the repair kit. Apply appropriate lubricant to o-rings and valve body bore

Pre-assemble the internal parts for pilot (P) side of the valve onto the screw and install into the body

Assemble remaining internal parts for inlet (I) side to the screw as illustrated. Once assembled, install the locknut and torque to 25 in.-lbs. (2.82Nm)

Screw end caps into the valve body until tight

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

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. The pipe MUST be inserted to the proper depth (“D”) into both gaskets

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

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