Graco Magnum ProX User Manual

Pump
12 3A3951A
Pump Inlet Valve Replacement
Disassembly
1. Perform Pressure Relief Procedure, on page 1.
2. Unplug sprayer.
3. Remove suction tube. Hopper may need to be
removed on models with a hopper.
4. Remove inlet valve fitting (6) from pump housing (1)
and discard. Make certain inlet ball (4), spring (3),
and ball guide (2) are removed from pump housing
(1).
5. Clean all dried residue from around pump inlet seal-
ing area in pump housing (1).
Assembly
1. Assemble ball guide (2), spring (3), and ball (4) into
pump housing (1).
a. The ball guide (2) is keyed for proper alignment.
b. Make certain the bump on the ball guide (2) is
aligned with the slot in the pump housing (1).
Slide ball guide (2) into pump housing(1).
c. Install spring (3) over ball stop pin in the ball
guide (2).
d. Install ball (4) into ball guide (2).
2. Make certain O-ring (6a) is installed on inlet valve
housing (6).
3. Thread new inlet valve housing into pump housing
(1) and torque. See Pump Assembly Drawing
page 8 for torque.
4. Use a pencil or similar object to push on the ball (4)
through the inlet valve intake to make sure the ball
moves free.
PushPrime Button Replacement
1. Perform Pressure Relief Procedure, on page 1.
2. Unplug sprayer.
3. Remove PushPrime button (7) from pump housing
(1) and discard.
4. Clean all dried residue from around PushPrime but-
ton sealing area in pump housing (1).
5. Verify that O-ring (7a) is installed on the PushPrime
button (7).
6. Thread new PushPrime button (7) into pump hous-
ing (1) and torque. See Pump Assembly Drawing
page 8 for torque.

Graco Magnum ProX Specifications

General

Brand	Graco
Model	Magnum ProX
Category	Paint Sprayer
Language	English