Graco 390 Repair Manual

Motor Replacement
26 310824C
Motor Replacement
See Wiring Diagram, page 27.
Removal
1. Relieve pressure, page 7. Disconnect power cord
from outlet.
2. Remove pump (9). Displacement Pump Replace-
ment, page 13.
3. Remove drive housing, Drive Housing Replace-
ment, page 15.
4. Remove Pressure (Fluid) Manifold, Manifold
Replacement, page 23.
5. Disconnect all leads from board (33) and remove
control board. Control Board Replacement, page
19.
6. Remove ground wire (G) from motor endbell.
7. Remove four screws (6) and motor (1) from frame
(45).
Installation
1. Install new motor (1) on frame (45) with four screws
(6).
2. Install manifold (15) with two screws (6). Manifold
Replacement, page 23
3. Install control board (33) with three screws (30).
Connect all leads to board. See Control Board
Replacement, page 19 and Wiring Diagram, page
27.
4. Connect ground wire (G) to motor with green ground
screw (31).
5. Install Drive Housing. Drive Housing Replace-
ment, page 15.
6. Install pump (9). Displacement Pump Replace-
ment, page 13.
7. Install shroud (29) with two screws (30).
WARNING
Read Electric Shock Warning, page 3 and Pressure
Relief Procedure, page 7.
CAUTION
Do not drop gear cluster (3) and (2) when removing
drive housing (5). Gear cluster may stay engaged in
motor frontend bell or drive housing.
6
1
Liberally apply grease
1
1
45
3
2
30
34
31
33
30
1
15
6
ti5642a

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