Graco 220853 User manual

WARNING
220853 Repair Kit
287737 Repair Kit
Replacement Motor Brushes
405819, Rev C, 4/2005
PRINTED IN U.S.A
GRACO INC./P.O. BOX 1441/
MINNEAPOLIS, MN 55440–1441
GENUINE GRACO PARTS & ACCESSORIES
Pressure Relief Procedure
To reduce the risk of serious bodily injury including fluid injec-
tion, splashing in the eyes or on the skin, moving parts, or
electric shock always shut off, unplug sprayer, and complete-
ly relieve air and fluid pressure before changing brushes.
To relieve pressure:
Shut off power to pump, hold metal part of gun firmly to side
of grounded metal pail, and trigger gun to relieve pressure.
ENGAGE TRIGGER SAFETY LATCH. Open any fluid drain
valves. If you suspect pressure is not fully relieved, slowly
loosen tip guard retaining nut and relieve pressure gradually.
ti6761a
HOOK
BRUSH
SPRING
CLIP
Disassembly
1. Remove motor cover, screws and washers.
Remove inspection covers, screws and gaskets from each side of motor.
2. Push in spring clip to release its hooks from brush holder. Pull out clip. See Fig 1.
3. Loosen terminal screw. Pull away brush lead, being careful motor lead terminal remains in place. Remove and dis-
card brush and spring. See Fig 2.
4. Inspect commutator for excessive pitting, burning or gouging. Black color on cummutator is normal. Have commuta-
tor resurfaced by qualified motor repair shop if brushes wear too quickly.
5. Repeat for other side.
Fig 1
ti6759a
Fig 2
SPRING
BRUSH SPRING CLIP
BRUSH LEAD
TERMINAL SCREW
MOTOR LEAD TERMINAL
FORM NO. 405819, front side
SIZE: 6” W X 7.5” L
REV: 4/2005
Border for reference only

When installing brushes, follow steps carefully. Im-
proper installation damages parts beyond use.
Fig 4
Reassembly
Fig 3
CAUTION
1. Install new brush so lead is in long slot of holder. Slide
terminal under terminal screw washer. Ensure motor
lead is still connected at screw. Tighten screw. See
Fig 4.
2. Place spring on as shown in Fig 3. Spring clip will
damage spring if spring is installed backward.
3. Install spring clip and push down until its hooks catch
short slots in housing. See Fig 4. Incorrect installa-
tion may jam clip.
4. Repeat for other side.
ti6760a
ti6759a
ti6761a
BRUSH HOLDER
SHORT SLOT
LONG SLOT
BRUSH
NOTE: spring must coil
in this direction
5. Test brushes: With ON/OFF switch OFF, turn pressure control knob counterclockwise to minimum pressure. Plug
in sprayer.
Turn ON/OFF switch ON. Slowly increase pressure until motor is at full speed. Inspect brush and commutator con-
tact area for excessive arcing. Arcs should not “trail” or circle around commutator surface.
To avoid damaging displacement pump, DO NOT run sprayer dry for more than 30 seconds while checking brushes.
CAUTION
WARNING
To reduce risk of electric shock and serious bodily injury, DO NOT touch brushes, leads, springs or brush holders while
sprayer is plugged in.
6. Test brushes: With ON/OFF switch OFF, turn pressure control knob counterclockwise to minimum pressure. Plug
in sprayer.
HOOK
SPRING CLIP
BRUSH LEAD
LONG SLOT
TERMINAL
TERMINAL SCREW
MOTOR LEAD TERMINAL
405819C 4/2005
FORM NO. 405819, back side
SIZE: 6” W X 7.5” L
REV: 4/2005
Border for reference only