Graco 390 Repair Manual

Displacement Pump Replacement
310824C 13
Displacement Pump Replacement
See manual 309250 for pump repair instructions.
Removal
1. Relieve pressure, page 7.
2. Loosen two screws (30) and rotate cover (44).
3. Loosen nut (A) and remove hose set (35). Loosen
nut (B) and remove the high pressure hose (14).
4. Cycle pump until pin (32) is in position to be
removed.
5. Disconnect power cord from outlet.
6. Using a flat screwdriver, push retaining spring (C)
up. Push out pump pin (32).
7. Using a hammer, loosen pump jam nut (11).
Unscrew and remove pump (9).
WARNING
Read Injection Hazard Warning, page 3, Moving
Parts Hazard Warning, page 4 and Pressure Relief
Procedure, page 7.
44
30
ti6104a
14
B
A
35
ti6105a
32
ti6106a
C
11
9
11
ti6107a

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