Power Supply Cord Replacement; On/Off Switch Replacement - Graco Sherwin-Williams ULTIMATE Mx 795 Owner's Manual

Motor Brush Replacement
11. Test brushes.
a. Remove pump connecting rod pin.
b. With sprayer OFF, turn pressure control knob
fully counterclockwise to minimum pressure.
Plug in sprayer.
c. Turn sprayer ON. Slowly increase pressure
until motor is at full speed.
d. Inspect brush and commutator contact area for
excessive arcing. Arcs must not trail or circle
around commutator surface.
WARNING
ELECTRIC SHOCK HAZARD
Do not touch brushes, leads, springs or
brush holders when sprayer is plugged
in to reduce risk of electric shock and
serious bodily injury.
Power Supply Cord
Replacement
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 7.
NOTE: Read General Repair Information on page 16
before doing this procedure. See Fig. 15.
1. Relieve pressure.
2. Remove pressure control cover (82).
3. Disconnect power supply cord black (J) lead from
ON/OFF switch (80),the white wire (D) going to
circuit board, and green wire (E) to grounding
screw (107).
4. Loosen strain relief bushing (G) and remove power
supply cord (79).
5. Install power supply cord (79) and tighten strain
relief bushing (G).
6. Connect power supply cord black (J) lead to
ON/OFF switch (80), white wire to circuit board
(D), and green wire (E) to grounding screw (107).
7. Install pressure control cover (82).
CAUTION
Do not run the sprayer dry for more than 30 seconds
while checking the brushes to avoid damaging the
displacement pump packings.
12. Install brush inspection covers and gaskets.
13. Break in brushes.
a. Operate sprayer for one hour with no load.
b. Install connecting rod pin.
On/Off Switch
Replacement
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 7.
NOTE: Read General Repair Information on page 16
before doing this procedure. See Fig. 15.
1. Relieve pressure.
2. Remove pressure control cover (82).
3. Disconnect two wires (B) and (J) from ON/OFF
switch (80).
4. Press in on two retaining tabs on each side of
ON/OFF switch (80) and remove.
5. Install new ON/OFF switch (80) so tabs of switch
snap into place on inside of pressure control
housing.
6. Connect two wires (B) and (J) to ON/OFF switch.
7. Install pressure control cover (82).