Graco 390 Repair Manual

Manual Conventions
2 310824C
Contents
Manual Conventions . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Component Identification . . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . . 7
General Repair Information . . . . . . . . . . . . . . . . . . 8
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Displacement Pump Replacement . . . . . . . . . . . . 13
Drive Housing Replacement . . . . . . . . . . . . . . . . . 15
Spin Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fan Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Motor Brush Replacement . . . . . . . . . . . . . . . . . . 18
Control Board Replacement . . . . . . . . . . . . . . . . . 19
Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 21
Pressure Control Assembly Replacement . . . . . . 22
Manifold Replacement . . . . . . . . . . . . . . . . . . . . . . 23
Power Cord Replacement . . . . . . . . . . . . . . . . . . . 24
Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . 25
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 29
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 30
Manual Conventions
Note
WARNING
WARNING: a potentially hazardous situation which, if
not avoided, could result in death or serious injury.
Warnings in the instructions usually include a symbol
indicating the hazard. Read the general Warnings
section for additional safety information.
Hazard Symbol
CAUTION
CAUTION: a potentially hazardous situation which, if
not avoided, may result in property damage or
destruction of equipment.
Additional helpful information.

Graco 390 Specifications

General

Max Pressure	3300 PSI
Flow Rate	0.47 GPM
Weight	30 lbs
Power Source	Electric
Type	Airless
Hose Length	50 ft
Voltage	120V
Horsepower	0.625 HP