Graco 307851B For 2:l Ratio Standard Pumps Standard Air Motor Owner's Manual

307-851
INSTRUCTIONS-PARTS LIST
RevB
SUPERSEDES A
This manual mntainr IMPORTANT
WARNINGS a d INSTRUCTIONS
READ AND RETAIN FOR REFERENCE
For 2 1 Ratio Standard Pumps
1 8p
~s
i 112 t x r ) MAXIMUM AIR WORKING PRESSURE
Model 2
0
4
4
6
4
,Series A
For Pump Model 204-456
Model aWm,Series C
For Pump Models 218555,218-556,2%'&l,
226440.and 208177
MODEL aDQow
MODEL~DC~
GRACO INC P.O. Box 1441 MINNEAPOLIS.MN
@COPYRIGHT 1987 GRACO INC.
5-1444
FIRE OR EXPLOSION HAZARD
Static electricity is created by the flow of fluid through the
pump and hose. If the system isnot properly grounded, sparking can occur. Sparks can ignite fumes
from solvents, the fluid
being sprayed. dust particles and other flammable substances,
whether spraying indoors or outdoors, resulting in fire or explosion and serious bodily injury.
Grounding
In a low pressure air spray system. static sparking
is generally
not a problem. However, some simple precautions should be
taken to reduce the risk. Check your local code for detailed
grounding instructions for your area and type of equipment,
and ground all of this equipment:
,
1.
- use ground wire and
clamp as instructed to the right.
Air Motor Model204-722 - use ground wire and
clamp as instructed in your pump manual.
Pump: Air Motor Model .?OW#
2.
Air Compressor: according to manufacturer's recommendations.
3.
Fluidhoses: use only grounded hoses with a maximum of
500 feet (1% m) combined hoselength to ensure grounding continuity. Refer to HOSE SAFETY.
4.
Spraygun/dispensing valve: obtaingrounding through
connection to a properly groundedfluid hose and pump.
5.
Object being sprayed: according to local code.
6.
Fluid supply containers: according to local code.
7.
AI1 solvent pails used when flushing: according to local
code. Use only metalpails, which are conductive.Do not
place the pail on a non-conductive surface, such
as paper
or cardboard, which interrupts the grounding continuity.
8.
To maintain grounding continuity when flushing or relievingpressure. alwayshold a metal part of
the gun firmly to
the side of a grounded metal pail, then trigger the gun.
Model 204-464
To ground pump with Air Motor Model"464: loosen the
grounding lug locknut IW) and washer 1x1. Insert one end of a
12 ga (1.5 mm2) minimum, ground wireIYI into the slot in lug
IZI and tighten the locknut securely. See above. Connect the
other endof the wire to a true earth ground.Refer to theback
cover to order a ground wire and clamp.
Flushing Safety
To reduce the risk of static sparking or splashing, follow the
Pressure Relief Procedure, on page 2 and remove the spray
tip (spray guns or spray valves only1 before flushing. Hold a
metal part of the gunlvalve firmly to the side of a grounded
metal pail and use the lowest possible fluid pressure during
flushing.
MOVING PARTS HAZARD
Thepiston inthe airmotor,locatedbehindtheairmotor
plates, moves when air is supplied to the motor. Moving parts
can pinch or amputateyourfingers
or otherbodyparts.
Therefore, NEVER operate the pump with the air motorplates
removed.KEEP CLEAR ofmovingpartswhenstarting
or
operating the pump. Before checking or servicing the pump,
follow the Pressure Relief Procedure on page 2 to prevent
the pump from starting accidentally.
.
IMPORTANT
~
United States Government safety standards have been adopted under
the Occupational Safetv andHealth Act. These standards-particularly the General Standards, Part 1910, and the Construction Standards, Part 1926-should be consulted.
Air Motor Model 204-722
4
lk
14
5'
-...
. .
3:
'*
APPLY SEALANT.
TORQUE TO
1014 In-lb
(1.3-1.6 N.ml
Fig 2
Fluid Pressure Gauge
1.
To recalibrate the gauge(Zc), adjust the valve (6) so
the gauge needle pointst o the first dial graduation
mark above the zero stop. Refer t o Fig 6. Turn the
calibrationscrew(2f)clockwise
t o increase and
counterclockwise to decrease the setting. Do n o t
remove the calibration screw from the housing. Any
loss of oil results in lower sensitivity.
2. If the gaugeneeds frequent calibration orloses sensitivity, check the housing(2a) for oilleaks. Connections between the gauge and housing must be tight.
If oil leaks around the calibration screw (21.or the
screw cannot be turned inward,
disassemble and
recharge.
3. To recharge the gauge, remove the six screws
20
(8)
fromthehousing(2al.
Clean andinspectthe
diaphragm inside the housing Ea). If the housing
diaphragm has cracks or leaks, replace the housing
(2a).
4.
'
Remove the calibration screw (21and inspect the
O-ring (2d') for damage. Replace if necessary.
5.
Remove the gauge (2cl from the pulsation dampener
(2b) carefully, to avoid oilloss. Check the gauge with
air pressure, and replace if it is damaged.
6.
Place the housing (2a). with its base face down, on a
flat surface. Fill the housing with light machine oil,
such as S A € 5W. through the calibration screw (2)
opening. When nearly full, place a finger over the
gauge
opening
and
fill
the
screw
opening
to
(2)
and O-ring (2dV
overflowing.Installthescrew
until flush, then turn in two full turns.
7.
Place the housing in a vise with the gauge opening
upandfillwithoilto
overflowing.Usingthread
sealer, tighten the gauge
securely into the housina. If
the gauge is fullycharged. it should read 20 or 361b.
Calibrate as explained in Step 1.
ng 6
PARTS DRAWING AND LIST
204-464.Series
Model
Air Motor
REF PART
NO. NO.
1
A
an
DESCRIPTION
*m05-101
AIR VALVE b PISTONASSY
'
Includes items la-le
la 'ZQ-884SCREW, socket hd caD: No. 6-32: 1"
long; with copper gasket
l b *157-634 .SPACER, valve plate
IC
V74-096 .PISTON, air
Id
162-728 .PLATE. ~.~
intake valve
le *162-729 .PLATE, exhaust valve
203-093 FLUID REGULATOR b GAUGE
2
Includes items2a-2f
2a 202-789 .HOUSING, fluid gauge
zb
203-228 .DAMPENER. Dulsation
101-180
2c
.GAUGE, fluid'pressure
2d *154-594
.O-RING: nitrile rubber
20 *157-127
.GASKk. diaphragm; vellumoid
2f
158-293 SCREW, calibration
3
219091 TUBE. displacement
5204-465
CAP, air motor
6
*204-496
VALVE, restrictor
~
~
~~_.
~
~~~
1
7
8
3
3
1
1
1
1
1
1
1
1
1
1
1
11
12
14
15
16
17
18
20
21
22
23
25
26
*101-389
101-174
"162-989
*158-698
*157-250
157-630
157-613
157-872
*158109
158879
1161-253
161-306
104M9
104-582
SEAL; leather
SCREW, fill head mach;
NO. ax X I"long
GASKET;rubber
O-RING, nitrile rubber
O-RING; nitrile rubber
SPRING, tapered compression
SPRING, compression
WASHER, valve
GASKET: rubber
BASE, air motor
CYLINDER, air
BEZEL, hood
SEAT, restrictor valve
CLAMP, electric grounding
WASHER, tab
1
1
*Recommended "tool box" spare
parts.
Keep
reduce down time.
1
6
1
1
1
1
1
1
1
1
1
1
1
1
1
on hand to

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