Graco 231-054 Manual De Usuario
2
307–758
TABLE OF CONTENTS
INTRODUCTION
2
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WARNINGS
English
4
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French
6
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Spanish
8
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SETUP
10
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OPERATION
12
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Startup
12
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Cleaning a Clogged Tip
13
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SHUTDOWN AND CARE
14
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FLUSHING GUIDELINES
15
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TROUBLESHOOTING GUIDE
Motor Won’t Operate
16
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Low Output
19
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No Output
20
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Excessive Pressure Fluctuations
20
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Motor Is Hot And Runs Intermittently
21
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Electrical Short
21
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Spin Test
22
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Bridge Test
23
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REPAIR
General Repair Information
24
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Motor Brush
25
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Power Supply Cord
26
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On/Off Switch
26
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Bridge Rectifier
27
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Circuit Breaker
27
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Circuit Board
28
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Pressure Control
29
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Pressure Control Adjustment
30
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Drive Housing, Conn Rod, Crankshaft
32
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Motor
34
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Displacement Pump
36
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PARTS DRAWINGS & LISTS
Displacement Pump
39
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Upright Sprayer
40
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Lo-Boy Sprayer
42
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Pressure Control
44
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Wiring Diagram
45
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ACCESSORIES
46
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TECHNICAL DATA
47
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DIMENSIONS
47
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GRACO PHONE NUMBERS
47
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THE GRACO WARRANTY AND DISCLAIMERS
48
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INTRODUCTION
ULTRA
500 BASIC COMPONENTS
Your new sprayer functions and operates differently than
other airless paint sprayers. This section will help you be-
come familiar with the sprayer before operating it.
other airless paint sprayers. This section will help you be-
come familiar with the sprayer before operating it.
Pressure Control
The pressure control includes an ON/OFF switch for the
sprayer, the pressure adjusting control knob, a pressure
sensing device and a current overload circuit breaker
with a manual reset button. The function of the pressure
control is to control the motor speed so that the sprayer
maintains constant fluid pressure at the pump outlet.
sprayer, the pressure adjusting control knob, a pressure
sensing device and a current overload circuit breaker
with a manual reset button. The function of the pressure
control is to control the motor speed so that the sprayer
maintains constant fluid pressure at the pump outlet.
Motor
The DC motor has sealed bearings and replaceable mo-
tor brushes. It drives the displacement pump at the rate
needed to supply sufficient paint volume at the selected
pressure. Working together, the pressure control and
motor cause the pump to cycle whenever there is fluid or
pressure demand. When the pump is cycling, the motor
sounds like an automobile starter cranking. When the
pump is not cycling, the motor may hum intermittently un-
til the fluid pressure stabilizes, then the motor will shut it-
self off. However, there will still be power to the sprayer
and it will stay pressurized and ready to use until you
manually shut it off and relieve pressure.
tor brushes. It drives the displacement pump at the rate
needed to supply sufficient paint volume at the selected
pressure. Working together, the pressure control and
motor cause the pump to cycle whenever there is fluid or
pressure demand. When the pump is cycling, the motor
sounds like an automobile starter cranking. When the
pump is not cycling, the motor may hum intermittently un-
til the fluid pressure stabilizes, then the motor will shut it-
self off. However, there will still be power to the sprayer
and it will stay pressurized and ready to use until you
manually shut it off and relieve pressure.
Because the motor is DC, it is less sensitive to low volt-
age or voltage fluctuations than an AC motor, and a
heavy gauge extension cord of up to 150 ft. (45 m) can
be used.
age or voltage fluctuations than an AC motor, and a
heavy gauge extension cord of up to 150 ft. (45 m) can
be used.
Drive Assembly
The sealed drive assembly transfers power from the DC
motor to the displacement pump.
motor to the displacement pump.
Displacement Pump
The positive displacement, volume-balanced pump pro-
vides equal fluid delivery on both the up and down pump
strokes. The pump has a wet-cup which, when filled with
Graco Throat Seal Liquid, helps prevent damage to the
throat packings and piston rod.
vides equal fluid delivery on both the up and down pump
strokes. The pump has a wet-cup which, when filled with
Graco Throat Seal Liquid, helps prevent damage to the
throat packings and piston rod.
Fluid Filter
The fluid filter strains the paint to help avoid clogs in the
hose and spray tip. The filter includes a reusable element
and has a pressure drain valve for manually relieving fluid
pressure.
hose and spray tip. The filter includes a reusable element
and has a pressure drain valve for manually relieving fluid
pressure.
Hoses
The grounded, nylon spray hoses have spring guards on
both ends. The 50 ft. (15.2 m) hose has a 1/4 in. ID. The
3 ft. (0.9 m), 3/16 in. ID hose provides more flexible gun
movement. The nylon hose material acts as a pulsation
dampener to absorb pressure fluctuations.
both ends. The 50 ft. (15.2 m) hose has a 1/4 in. ID. The
3 ft. (0.9 m), 3/16 in. ID hose provides more flexible gun
movement. The nylon hose material acts as a pulsation
dampener to absorb pressure fluctuations.
Spray Gun & RAC IV DripLess Tip Guard
Graco high pressure spray guns have a safety latch
which prevents accidental triggering when it is engaged.
See the Detail in Fig 3–1. The gun provided with the
sprayer also has a filter for final paint straining. The
Reverse-A-Clean IV SwitchTip uses high pressure fluid
to remove clogs from the spray tip without removing it
from the gun. The Reverse-A-Clean IV DripLess tip
guard is a safety feature which helps reduce the risk of
fluid injection injury.
which prevents accidental triggering when it is engaged.
See the Detail in Fig 3–1. The gun provided with the
sprayer also has a filter for final paint straining. The
Reverse-A-Clean IV SwitchTip uses high pressure fluid
to remove clogs from the spray tip without removing it
from the gun. The Reverse-A-Clean IV DripLess tip
guard is a safety feature which helps reduce the risk of
fluid injection injury.