Table Of Contents - Graco 231-043 Instructions-Parts List Manual

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARNINGS
English . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
French . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spanish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SETUP
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OPERATION
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Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning a Clogged Tip
SHUTDOWN AND CARE
FLUSHING GUIDELINES
TROUBLESHOOTING GUIDE
Motor Won't Operate
Low Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
No Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Excessive Pressure Fluctuations
Motor Is Hot And Runs Intermittently
Electrical Short . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spin Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bridge Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ULTRA 1000 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.
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.
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. W orking 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
heavy gauge extension cord of up to 150 ft. (45 m) can
be used.

TABLE OF CONTENTS

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INTRODUCTION
, and a
2 REPAIR
General Repair Information
Motor Brush
4
Power Supply Cord
6
On/Off Switch
Bridge Rectifier
8
Circuit Breaker
10
Circuit Board
Pressure Control
12
Pressure Control Adjustment
12
Bearing Housing & Connecting Rod
13
Drive Housing
Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
Displacement Pump
15
PARTS DRAWINGS & LISTS
Displacement Pump
Sprayer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
Pressure Control
19
Wiring Diagram
20
ACCESSORIES
20
TECHNICAL DATA
21
DIMENSIONS
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21
GRACO PHONE NUMBERS
22
THE GRACO WARRANTY AND DISCLAIMERS
23
Drive Assembly
The sealed drive assembly transfers power from the DC
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.
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.
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.
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.
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