Cleaning the intake screen

1.The intake screen will clog and must be cleaned at least once a day.

2.Turn the intake screen counterclockwise to remove it from the bottom of the suction tube.

3.Clean thoroughly with the appropriate solvent.

Suction Tube

Intake Screen

Additional maintenance

Repacking the fluid section

A small amount of paint bypassing the piston and coming out of the slots in the upper piston housing is normal. If it becomes excessive, or if paint pressure drops, the piston packings need to be replaced.

WARNING

ALWAYS follow the PRESSURE RELIEF PROCEDURE found in your manual before starting any troubleshooting, servicing or cleaning.

WARNING

ELECTRICAL SHOCK HAZARD. Make certain that the unit is turned off and unplugged before attempting any disassembly.

Removing the fluid section

1.Loosen and remove the suction tube assembly by turning it counterclockwise.

2.Remove the shroud.

3.Remove the finger guard.

4.Loosen the screw clamp and remove the return line.

5.Remove the cotter pin from the connecting pin.

6.Remove the connecting pin by pushing it through the slide block and piston rod.

7.Loosen and remove the fluid hose.

8.Loosen the large locknut (item 7 in the illustration, next page) on the upper end of the fluid section.

9.Unscrew the entire fluid section assembly by turning it counterclockwise.

Shroud

Finger Guard

Connecting Pin

Fluid Hose

Cotter Pin

Suction Tube Assembly

 

CAUTION

Do not run the motor with the fluid assembly removed.

Removing the piston rod assembly

Refer to the parts listing for the fluid section assembly.

1.Position the inlet valve housing (28) in a vise so that the fluid section is vertical. Tighten the vise.

2.Position a large adjustable wrench on the wrench flats of the cylinder (8). Turn the cylinder counterclockwise until the cylinder is removed from the inlet valve housing.

3.Remove the inlet valve housing from the vise. Remove the inlet ball stop disk (23) and tap out the inlet ball cage (25).

NOTE: If any parts are difficult to disassemble, soak them in an appropriate solvent until the paint softens.

4.Remove the inlet valve carbide seat (26). Inspect the inlet valve ball and the inlet ball seat for damage. If the seat is worn or damaged, it can be flipped to the unused side. If you flip or replace the seat, the ball must be replaced.

NOTE: If the carbide valve seat requires replacement, use valve kit P/N 0294689.

5.Remove the inlet valve seat O-ring (27) from the inlet valve housing.

6.Position the wrench flats of the cylinder (8) in a vise and tighten the vise.

CAUTION

Do not over tighten or you might damage the cylinder.

7. Remove the packing nut (1).

CAUTION

Hold a hand under the piston rod (10). The piston rod may be damaged if it falls. The lower packings may also fall out.

8.Gently tap down the piston assembly with a rubber mallet until the piston assembly comes out.

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