Displacement Pump - Graco Roof Rigs 224483 Instructions-Parts List Manual

Gasoline powered airless sprayer 1200 psi (8.3 mpa, 83 bar) maximum working pressure

Hide thumbs

Table of Contents

Removing and Installing A Displacement Pump

4. Check the back of the bearing housing to be sure the

parts are installed properly.

5. Lift the pump to align the mounting holes and install

the mounting screws. IMPORTANT – torque the

screws to 20 ft-lb (27 N.m). See Fig. 13.

6. Plug in the power cord so the notch in the collar and

the tab in the socket align. Screw on the collar. See

Fig. 14.

WARNING

To reduce the risk of serious injury, always follow

the Pressure Relief Procedure on page 8 before

repairing the sprayer.

Disassemble the pump

See page 18 for how to remove the pump.

Use a hard rubber mallet on the tabs of the lug nut

(421) to loosen the foot valve housing.

Disassemble the pump, but do not disassemble the

piston rod (401) from the piston housing (416) unless

one of those needs to be replaced. Due to the high-

strength Loctite used at the joint of these two parts,

the joint must be heated before disassembly. Refer

to Fig. 15.

Clean and inspect all parts

Use a compatible solvent to thoroughly clean all

parts and remove all traces of sealant.

2. Inspect the parts, including seats, for nicks and

scratches. Replace worn or damaged parts as they

cause the packings to wear more quickly and/or re-

sult in poor pump performance.

Continued on page 20.