Graco 17R936 User manual

3A5024B
EN
Repair
Kits for HVLP Sprayers
For repair of components in HVLP sprayers.
Important Safety Instructions
Read all warnings and instructions in your sprayer and gun manuals.
Be familiar with the controls and the proper usage of the equipment.
Save these instructions.
Related Manuals:
3A4967 FinishPro HVLP Sprayer
3A4980 HVLP Edge II/Edge II Plus Gun
Section Description Kit #
Turbine Repair, page 4
120VAC, 7.0 Models, 17R936
120VAC, 9.0 Models 17R937
120VAC, 9.5 Models 17R938
230VAC, 7.0 Models 17R939
230VAC, 9.0 Models 17R940
230VAC, 9.5 Models 17R941
Control Board Repair,
page 6
120VAC, Standard Models 17R942
120VAC, ProContractor/ProComp Models 17R943
230VAC, Standard Models 17R944
230VAC, ProContractor/ProComp Models 17R945
Potentiometer Repair,
page 8
Standard Models 17R946
ProContractor/ProComp Models 17R948
Compressor Repair
(ProComp Models
only), page 11
120VAC Models 17R962
230VAC Models 17R964

Warnings
23A5024B
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this
equipment. The exclamation point symbol alerts you to a general warning and the hazard
symbols refer to procedure-specific risks. When these symbols appear in the body of this
manual or on warning labels, refer back to these Warnings. Product-specific hazard symbols
and warnings not covered in this section may appear throughout the body of this manual
where applicable.
ELECTRIC SHOCK HAZARD
This equipment must be grounded.Improper grounding, setup, or usage of the system can
cause electric shock.
•Turn off and disconnect power cord before servicing equipment.
•Connect only to grounded electrical outlets.
•Use only 3-wire extension cords.
•Ensure ground prongs are intact on power and extension cords.
•Do not expose to rain. Store indoors.
PRESSURIZED EQUIPMENT HAZARD
Fluid from the equipment, leaks, or ruptured components can splash in the eyes or on skin and
cause serious injury.
•Follow the Pressure Relief Procedure when you stop spraying/dispensing and before
cleaning, checking, or servicing equipment.
•Tighten all fluid connections before operating the equipment.
•Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury,
including eye injury, hearing loss, inhalation of toxic fumes, and burns. This protective
equipment includes but is not limited to:
•Protective eyewear, and hearing protection.
•Respirators, protective clothing, and gloves as recommended by the fluid and solvent
manufacturer.

Pressure Relief Procedure
3A5024B 3
Pressure Relief Procedure
Follow the Pressure Relief
Procedure whenever you see this
symbol.
1. Turn the ON/OFF switch to OFF
position.
Standard Models:
ProContractor and ProComp Models:
2. Unplug power cord to disconnect power.
3. Disconnect spray gun from air hose.
If using a FlexLiner System:
4. Disconnect tubing from gun to relieve
pressure in the cup.
If using a ProComp remote cup:
5. Turn compressor ON/OFF switch to OFF
position.
6. Disconnect air hose from remote cup.
Turn out pressure regulator one turn.
Wait until pressure is completely
relieved before removing cover.
The spray gun cup is pressurized. To
reduce the risk of splashing from
pressurized fluid, always follow the
Pressure Relief Procedure before
removing cup.
ti30756a
ti30625a
ti30756a
ti30757a
ti30627a
ti30892a
ti30893a

Turbine Repair
43A5024B
Turbine Repair
Standard Models
Refer to the Parts List - Standard Models,
page 13.
Removal:
1. Perform Warnings, page 2.
2. Turn power switch (36) to OFF and
unplug the power cord to disconnect
power.
3. Disconnect air hose from the turbine
outlet.
4. Remove eight screws (16) and the top
cover (31).
NOTE: Be cautious not to damage the wires
that connect to the cover.
5. Remove five screws (16), disconnect air
hose (29), and remove the rear panel
(22).
6. Remove three screws (16) and the air
filter housing (15). Remove gasket (14)
from the filter housing (15) and discard.
7. Disconnect the motor leads from the
control board (20).
8. Remove the 3 turbine mounting bolts
(13) and spacers (9 & 11).
9. Remove the turbine assembly (12).
10. Remove plate (10) and gasket (8).
11. Remove three nuts (7) and gaskets (6).
Installation:
1. Apply thread locker to studs on the
turbine enclosure (1) and install three
new nuts (7) and gaskets (6). Torque to
110-115 in-lb (12.5 - 13.0 N•m).
2. Install new turbine assembly (12) along
with new plate (10) and gasket (8).
3. Apply thread locker to turbine mounting
bolts (13) and slide into place through
the spacers (9 & 11). Torque to 110-115
in-lb (12.5 - 13.0 N•m).
4. Connect motor leads to the control board
(20). Refer to Wiring Diagrams
(Standard), page 18.
5. Place new gasket (14) onto filter housing
(15) and install using 3 screws (16).
Torque to 20-25 in-lbs (2.5 - 3.0 N•m).
6. Connect air hose (29) to rear panel (22)
and install using five screws (16). Torque
to 20-25 in-lbs (2.5 - 3.0 N•m).
7. Install top cover (31) using 8 screws (16).
Torque to 20-25 in-lbs (2.5 - 3.0 N•m).
NOTICE
Use blue thread locker provided in turbine
repair kit to avoid loosening of spacers due
to turbine vibration. Failure to use thread
locker may result in premature turbine
failure.

Turbine Repair
3A5024B 5
ProContractor & ProComp
Models
Refer to the Parts List - ProContractor
Models, page 15 & Parts List - ProComp
Models, page 17.
Removal:
1. Perform Warnings, page 2.
2. Turn the power switch (36) to OFF and
unplug the power cord to disconnect
power.
3. Disconnect air hose from the turbine
outlet.
4. Remove eleven screws (16) and the top
cover (31).
NOTE: Be cautious not to damage the wires
that connect to the cover.
5. Remove six screws (16), disconnect air
hose (18), and remove the rear panel
(22).
6. Remove five screws (16), leaving two
outlet valve (17) mounting screws (16) in
place. Remove the front panel (30). Pull
straight out to remove the outlet valve
assembly (17) from the turbine (12)
outlet.
7. Use a flat blade screwdriver to pry strain
relief (39) from inner panel (15).
Disconnect the monitor leads from the
control board (20).
8. Loosen two mounting nuts (83) on the
inner panel (15).
9. Remove the three turbine mounting bolts
(13) and spacers (9 & 11) (Some models
only have a single spacer).
10. Remove the turbine assembly (12).
Remove the mounting plate (10) and
gasket (8).
11. Remove three nuts (7) and gaskets (6).
Installation:
1. Apply thread locker to studs on the
turbine enclosure (1) and install three
new nuts (7) and gaskets (6).
2. Install new turbine assembly (12) along
with new plate (10) and gasket (8).
3. Apply blue thread locker to turbine
mounting bolts (13) and slide into place
through the spacers (9 & 11). Torque to
110-115 in-lb (12.5 - 13.0 N•m).
4. Tighten the mounting nuts (83) on the
inner panel (15). Torque to 20-25 in-lbs
(2.5 - 3.0 N•m).
5. Route the turbine (12) leads through the
strain relief (39) and install back into
inner panel (15).
6. Connect motor leads to the control board
(20). Refer to Wiring Diagrams
(ProContractor), page 19 and Wiring
Diagrams (ProComp), page 20.
7. Install the front panel (30) using five
screws (16). Torque to 20-25 in-lbs (2.5
- 3.0 N•m).
8. Connect air hose (18) to rear panel (22)
and install using six screws (16). Torque
to 20-25 in-lbs (2.5 - 3.0 N•m).
9. Install top cover (31) using eleven
screws (16). Torque to 20-25 in-lbs (2.5
- 3.0 N•m).
NOTICE
Use blue thread locker provided in turbine
repair kit to avoid loosening of spacers due
to turbine vibration. Failure to use thread
locker may result in premature turbine
failure.

Control Board Repair
63A5024B
Control Board Repair
Standard Models
Refer to the Parts List - Standard Models,
page 13.
Removal:
1. Perform Warnings, page 2.
2. Turn the power switch (36) to OFF and
unplug the power cord to disconnect
power.
3. Remove eight screws (16) and the top
cover (31).
NOTE: Be cautious not to damage the wires
that connect to the cover.
4. Remove five screws (16), disconnect air
hose (29), and remove the rear panel
(22).
5. Disconnect turbine motor leads (12) and
the potentiometer (45) from the control
board (20). Refer to Wiring Diagrams
(Standard), page 18.
6. Disconnect control board leads to the
power switch (36) and power cord
receptacle (23). Refer to Wiring
Diagrams (Standard), page 18.
7. Remove four control board mounting
screws (21) and remove control board
(20).
Installation:
1. Install new control board (20) using four
screws (21). Torque to 15-20 in-lbs (1.7
- 2.3 N•m).
2. Connect control board leads to the
power switch (36) and power cord
receptacle (23). Refer to Wiring
Diagrams (Standard), page 18.
3. Connect turbine motor leads (12) and
potentiometer (45) to the new control
board (20). Refer to Wiring Diagrams
(Standard), page 18.
4. Connect air hose (29) to rear panel (22)
and install using five screws (16).Torque
to 20-25 in-lbs (2.5 - 3.0 N•m).
5. Install top cover (31) using eight screws
(16). Torque to 20-25 in-lbs (2.5 - 3.0
N•m).

Control Board Repair
3A5024B 7
ProContractor & ProComp
Models
Refer to the Parts List - ProContractor
Models, page 15 & Parts List - ProComp
Models, page 17.
Removal:
1. Perform Warnings, page 2.
2. Turn the power switch (36) to OFF and
unplug the power cord to disconnect
power.
3. Remove eleven screws (16) and the top
cover (31).
NOTE: Be cautious not to damage the wires
that connect to the cover.
4. Remove two screws (21) that mount the
TurboControl LED (20a) to the top cover.
5. Peel foam gasket (90) back and remove
wires from power switch (36) and
potentiometer (47) from the wire bundle.
Refer to Fig. 1.
6. For ProComp models, peel open foam
gasket (91) to remove wire bundle and
discard.
7. Remove six screws (16), disconnect air
hose (18), and remove rear panel (22).
8. Disconnect all leads going to and from
the control board (20). Refer to Wiring
Diagrams (ProContractor), page 19
and Wiring Diagrams (ProComp),
page 20.
9. Remove the air line (19) going to control
board (20).
10. Remove four control board mounting
screws (21) and remove control board
(20).
Installation:
1. Install new control board (20) using four
screws (21). Torque to 15-20 in-lbs (1.7
- 2.3 N•m).
2. Connect the air line (19) to the control
board (20).
3. Peel off the paper backing and place
sticky side of foam gasket (88) onto the
TurboControl LED (20a). Install
mounting screws (21) to top cover (31).
Torque to 15-20 in-lbs (1.7 - 2.3 N•m).
4. Route ribbon cable from TurboControl
LED (20a), wires from potentiometer
(47), and wires from power switch (36)
through the foam gasket (90) as shown.
Place sticky side of foam gasket (90)
down onto the TurboControl LED (20a).
Refer to Fig. 1.
5. For ProComp models, wrap foam gasket
(91) around the wire bundle to protect
against damage from the compressor
power switch (77).
6. Connect all leads going to and from the
control board (20). Refer to Wiring
Diagrams (ProContractor), page 19
and Wiring Diagrams (ProComp),
page 20.
7. Connect air hose (18) to rear panel (22)
and install using six screws (16). Torque
to 20-25 in-lbs (2.5 - 3.0 N•m).
8. Install top cover (31) using eleven
screws (16). Torque to 20-25 in-lbs (2.5
- 3.0 N•m).
Fig. 1
47
36
90
90
90
ProComp Models
90
91
91
ti31348a

Potentiometer Repair
83A5024B
Potentiometer Repair
Standard Models
Refer to the Parts List - Standard Models,
page 13.
Removal:
1. Perform Warnings, page 2.
2. Turn power switch (36) to OFF and
unplug the power cord to disconnect
power.
3. Loosen two set screws and remove the
knob (37).
4. Remove eight screws (16) and the top
cover (31).
NOTE: Be cautious not to damage the wires
that connect to the cover.
5. Remove mounting nut and washer of
potentiometer (45) from the top cover
(31).
6. Disconnect potentiometer (45) from the
control board (20).
Installation:
1. Connect new potentiometer (45) to the
control board (20). Refer to Wiring
Diagrams (Standard), page 18.
2. Remove the mounting nut from the
potentiometer (leave washer in place)*
and slide through opening in the top cover
(31). For proper alignment, the locating
tab on the potentiometer (45) should be
inserted into the hole in the top cover (31).
Refer to Fig. 2.
*Remove and discard plain washer if unit has
Isolator (17X783).
3. Install the mounting nut. Torque to 10-15
in-lb (1.1 - 1.7 N•m).
4. Install top cover (31) using eight screws
(16). Torque to 20-25 in-lbs (2.5 - 3.0
N•m).
5. Rotate the shaft of the potentiometer
(45) clockwise as far as it can go. Slide
the knob (37) over the shaft and align the
pointer to the maximum setting on the
control label (35). While applying a light
pressure to the knob (37), tighten the two
set screws to 3-5 in-lb (0.3 - 0.6 N•m).
Fig. 2

Potentiometer Repair
3A5024B 9
ProContractor & ProComp
Models
Refer to the Parts List - ProContractor
Models, page 15 & Parts List - ProComp
Models, page 17.
Removal:
1. Perform Warnings, page 2.
2. Turn power switch (36) to OFF and
unplug the power cord to disconnect
power.
3. Loosen the two set screws and remove
the knob (37).
4. Remove eleven screws (16) and the top
cover (31).
NOTE: Be cautious not to damage the wires
that connect to the cover..
5. Remove mounting nut and washer of
potentiometer (45) from the top cover
(31).
6. For ProComp models only, peel open
foam gasket (91) to remove wire bundle
and discard. See Fig. 1 on page 7.
7. Disconnect potentiometer (47) from
control board (20).
8. Peel foam gasket (90) attached to top
cover (31) back and slide the
potentiometer (47) wires from the
bundle. See Fig. 1 on page 7.

Potentiometer Repair
10 3A5024B
Installation:
1. Route the wire from the new
potentiometer (47) through the foam
gasket (90).
2. Connect potentiometer (47) to the
control board (20). Refer to Wiring
Diagrams (ProContractor), page 19
and Wiring Diagrams (ProComp),
page 20.
3. For ProComp models, wrap the foam
gasket (91) around the wire bundle to
protect against damage from the
compressor power switch (77).
4. Remove the mounting nut from the
potentiometer (leave washer in place)*
and slide through opening in the top cover
(31). For proper alignment, the locating
tab on the potentiometer (47) should be
inserted into the hole in the top cover (31).
Refer to Fig. 3.
*Remove and discard plain washer if unit has
Isolator (17X783).
5. Install the mounting nut. Torque to 10-15
in-lb (1.1 - 1.7 N•m).
6. Install top cover (31) using eight screws
(16). Torque to 20-25 in-lbs (2.5 - 3.0
N•m).
7. Rotate the shaft of the potentiometer
(45) clockwise as far as it can go. Slide
the knob (37) over the shaft and align the
pointer to the maximum setting on the
control label (35). While applying a light
pressure to the knob (37), tighten the two
set screws to 3-5 in-lb (0.3 - 0.6 N•m).
Fig. 3