Piston Plug Installation; Fuse Replacement - Graco PR70 Repair Parts

Repair

Piston Plug Installation

508
1802
1801
1. Drain the pump.
• If ball valves are installed, close the ball
valves then take several shots.
• If ball valves are not installed, empty the
tanks. Perform shots repeatedly until no mate-
rial comes out of the dispense valve.
2. Relieve pressure. See Pressure Relief Procedure,
page 13.
3. To prevent machine movement, press the Machine
Disable Mode key (
4. Use a wrench to remove the existing piston
plug (1801) from the pump end cap (508).
5. Remove the existing o-ring (1802).
6. Lubricate the new o-ring with a high temperature
grease (part 115982) and install the lubricated
o-ring into the end cap.
7. Open the tank ball valves if installed.
8. Fill tanks.
9. Perform several shots to fill the pump with new
material.
32
ti12562a
).

Fuse Replacement

Fuse Holder
1
1
Fuse holder is located between the
power connector and power switch.
1. Remove incoming power cord from machine.
2. Insert a flat-head screw-driver between the fuse
holder and the back of the incoming power bracket
remove machine fuse holder.
3. Remove the blown fuse from the machine fuse
holder.
4. Install new fuse with same rating into the fuse
holder.
5. Install the fuse holder into the Incoming Power
Bracket.
ti12563a
312760A