Graco EM 490 Instructions-Parts List Manual page 15

REMOVING and REPLACING ELECTRIC MOTOR
WARNING
To reduce the risk of serious bodily injury, including
fluid injection; splashing in the eyes; injury from
moving parts or electric shock, always follow the
Pressure Relief Procedure W arning on page 11
before continuing.
1 Disconnect the hose (52) at the displacement pump.
See page 19.
2 Remove the drive assembly. See page 14. You can
leave the pump, connecting rod and bearing assem-
bled to the drive assembly.
3 Drive out the pin (27) and remove the gear (37). Re-
move the screws (135) and cover (41) from the pres-
sure control (50). See Fig 17.
27
37
4
3
Fig 7–17
4 Disconnect the green/yellow motor lead from the
grounding screw (302), the brown motor lead from the
microswitch and the blue lead from the on/off switch.
See Fig 18.
5 Unscrew the connector (130 and 305) nuts on both
ends of the conduit (1). Remove the screws (7), nuts
(3) and lockwashers (4). See Fig 17 . Remove the mo-
tor from the frame while carefully guiding the wires
through the connector (305) in control box. Remove
the conduit (1) from the wires.
6 Loosen the locknut and unscrew the connector (130)
from the motor , being careful to avoid twisting the
wires.
7 Install the new motor in the reverse order.
23
7
ON/OFF
SWITCH
130
1
305
HIDDEN
FROM
VIEW
50
41
MICROSWITCH
135
Fig 7–18
0133
MOTOR LEADS
GRN/YEL
BLUE
BROWN
ATTACH TO GROUNDING
SCREW(302)
WIRING DIAGRAM
POWER
CORD
0131