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

This manual suits for next models

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