Table of Contents
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TABLE OF CONTENTS
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2
Warnings
English
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4
Spanish (Advertencia) 8
French (Avertissernent)
6
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10
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11
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Pinion. Clutch. Field. Clam. Enaine
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Pinion Housing kemo&
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Parts Lists and Drawings
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Uprighi Cart,' Model 220-040
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36
Completre Sprayer,
Lo-Bov Cart. Model 231-077
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I
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Back Cover
INTRODUCTION
GM3500 BASIC COMPONENTS
(Refer to Fig 3-1)
The GM3500 Sprayer functions and operates differently
than other airless paint sprayers. Read this section to
help you become familiar with the sprayer before operat-
ing it.
Pressure Control
The pressure control includes an ON/OFF switch for the
sprayer, the pressure adjusting knob, and a pressure
engages the clutch to control pressure.
sensing device. The pressure control engages and dis-
Engine
The engine is a 3.5 horsepower, four stroke gasoline en-
gine. Its function is to drive the displacement pump to
supply paint. An adjustable throttle allows you to adjust
engine speed for large or small
oritice
spray tips. When
the oil level is too low, the engine shuts off automatically.
If you try to start the engine without
refilling the oil, a light
illuminates to
alert
you to the problem and
protect the en-
gine from damage.
Clutch
The clutch is engaged by the electric power generated
by
the gasoline engine.The power is controlled
by
the pres-
sure switch.
Drive Assembly
The permanentlygreased drive assembly transfers
power from the gas engine
to the displacement pump.
Displacement Pump
The positive displacement, volumebalanced 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
and a pressure drain valve
for relieving fluid pressure.
hose and spray tip. The filter includes a reusable element
Hoses
The grounded, nylon spray hoses
have spring guards on
3 foot (0.9 m), 3/16 in. ID whip hose allows flexible gun
both ends. The 50 foot (1 5.2 m)
hose has a 1/11 in. ID. The
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 trigger safety
which prevents accidental triggering when the safety is
engaged. See Fig 2-1. The Contractor gun provided
with this sprayer also has a filter
for final paint straining.
The Graco SwitchTipTM
uses
high pressure fluid to
re-
move clogs from the spray tip without removing
it
from the
gun. The Reverse-A-Clean@ IV DripLessTM tip guard is a
safety feature which reduces the risk
of fluid injection.
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