Graco Triton 308 Operation manual

309303
Rev. B
First choice when
quality counts.t
ti1029a
Part No. 233501 Shown
INSTRUCTIONS–PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
1:1 RATIO
TRITONt308 Diaphragm Pump
115 psi (0.8 MPa, 8 bar) Maximum Fluid Working Pressure
115 psi (0.8 MPa, 8 bar) Maximum Air Input Pressure
Part No. 233500 Aluminum Pump, Series A
Part No. 233501 Stainless Steel Pump, Series A
US and Foreign Patents Pending
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
ECOPYRIGHT 2001, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
Parts

2 309303
Table of Contents
Safety Warnings 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service
Remove the Fluid and Side Covers 14. . . . . . . . . . .
Ball Check Repair 16. . . . . . . . . . . . . . . . . . . . . . . . . .
Diaphragm Repair 17. . . . . . . . . . . . . . . . . . . . . . . . . .
Air Valve Repair 18. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shaft Repair 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 26. . . . . . . . . . . . . . . . . . . . . .
Graco Toll-Free Phone Numbers 26. . . . . . . . . . . . . . . .
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.

309303 3
WARNING
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result
in a serious injury.
DThis equipment is for professional use only.
DRead all instruction manuals, tags, and labels before operating the equipment.
DUse the equipment only for its intended purpose. If you are not sure, call your Graco distributor.
DDo not alter or modify this equipment. Use only genuine Graco parts and accessories.
DCheck equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure of the lowest rated component in your system. This
equipment has a 115 psi (0.8 MPa, 8 bar) maximum working pressure at 115 psi (0.8 MPa, 8
bar) maximum incoming air pressure.
DUse fluids and solvents which are compatible with the equipment wetted parts. Refer to the Tech-
nical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.
DAluminum pumps only: Never use 1.1.1–trichloroethane, methylene chloride, other halogenated
hydrocarbon solvents or fluids containing such solvents in pressurized aluminum equipment. Such
use could result in a chemical reaction, with the possibility of explosion.
DDo not use hoses to pull equipment.
DRoute hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose
Graco hoses to temperatures above 180_F (82_C) or below –40_F (–40_C).
DWear hearing protection when operating this equipment.
DComply with all applicable local, state, and national fire, electrical, and safety regulations.

4 309303
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition and
result in fire or explosion and serious injury.
DGround the equipment. Refer to Grounding on page 7.
DIf there is any static sparking or you feel an electric shock while using this equipment, stop pump-
ing immediately. Do not use the equipment until you identify and correct the problem.
DProvide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being pumped.
DKeep the work area free of debris, including solvent, rags, and gasoline.
DElectrically disconnect all equipment in the work area.
DExtinguish all open flames or pilot lights in the work area.
DDo not smoke in the work area.
DDo not turn on or off any light switch in the work area while operating or if fumes are present.
DDo not operate a gasoline engine in the work area.

309303 5
WARNING
PRESSURIZED FLUID HAZARD
Spray from the gun, hose leaks, or ruptured components can splash fluid in the eyes or on the skin
and cause serious injury.
DDo not stop or deflect fluid leaks with your hand, glove, or rag.
DFollow the Pressure Relief Procedure on page 11 before cleaning, checking, or servicing the
equipment.
DTighten all fluid connections before each use.
DCheck the hoses, tubes, and couplings daily. Replace parts immediately if worn, damaged, or
loose. Permanently coupled hoses cannot be repaired.
TOXIC FLUID HAZARD
Hazardous fluids or toxic fumes can cause a serious injury or death if splashed in the eyes or on the
skin, swallowed, or inhaled.
DKnow the specific hazards of the fluid you are using. Read the fluid manufacturer’s warnings.
DStore hazardous fluid in an approved container. Dispose of the hazardous fluid according to all
local, state, and national guidelines.
DWear appropriate protective clothing, gloves, eyewear, and respirator.
DIf the diaphragm fails, the fluid is exhausted along with the air.

6 309303
Installation
General Information
DFig. 2 shows a wall mounted HVLP spray applica-
tion. It is only a guide for selecting and installing
system components. Contact your Graco distributor
for assistance in planning a system to suit your
needs.
DAlways use Genuine Graco Parts and Accessories,
available from your Graco distributor. If you supply
your own accessories, be sure they are adequately
sized and pressure rated for your system.
DUse a compatible, liquid thread sealant on all male
threads. Tighten all connections firmly to avoid air
or fluid leaks.
DReference numbers and letters in parentheses refer
to the callouts in the figures and the parts lists on
pages 22–23.
DIn a spray system, ventilate the spray booth.
WARNING
FIRE AND EXPLOSION HAZARD
To prevent hazardous concentrations of
toxic and/or flammable vapors, spray
only in a properly ventilated spray booth.
Never operate the spray gun unless
ventilation fans are operating.
Check and follow all of the national,
state, and local codes regarding air
exhaust velocity requirements.
WARNING
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can
cause serious injury or death if splashed
in the eyes or on the skin, inhaled, or
swallowed.
1. Read TOXIC FLUID HAZARD on page 5.
2. Use fluids and solvents which are compatible
with the equipment wetted parts. Refer to the
Technical Data section of all equipment manu-
als. Read the fluid and solvent manufacturer’s
warnings.
Mounting the Pump
DMount the pump in a well-ventilated area, with
sufficient clearance on all sides for operator access
and servicing.
DBe sure the mounting can support the weight of the
pump, hoses, and accessories, as well as the
stress caused during operation.
DThe pump may be mounted vertically or horizontal-
ly. Be sure the pump is level in all directions.
DWall, pail, stand, or portable cart mounting kits are
available from Graco. For other mountings, be sure
the pump is adequately secured.The pump has two
mounting holes for 0.35 in. (9 mm) screws. See the
Dimension drawing on page 25.

309303 7
Installation
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
This pump must be grounded. Before
operating the pump, ground the system
as explained below. Also read the sec-
tion FIRE AND EXPLOSION HAZARD
on page 4.
To reduce the risk of static sparking, ground the pump
and all other equipment used or located in the pumping
area. Check your local electrical code for detailed
grounding instructions for your area and type of equip-
ment.
Ground all of this equipment:
DPump: Attach a ground wire (Y) to the pump’s
grounding clamp (35) and secure with the screw, as
shown in Fig. 1. Connect the clamp end of the
ground wire to a true earth ground. Order Part No.
238909 Ground Wire and Clamp.
Fig. 1
Y
35
ti1030a
DAir and fluid hoses: Use only electrically conductive
hoses.
DAir compressor: Follow the manufacturer’s recom-
mendations.
DSolvent pails used when flushing: Follow your local
code. Use only metal pails, which are conductive.
Do not place the pail on a non-conductive surface,
such as paper or cardboard, which interrupts the
grounding continuity.
DFluid supply container: Follow your local code.

8 309303
Installation
Air Line
WARNING
A bleed-type master air valve (B) is required in your
system to relieve air trapped between this valve
and the pump. See Fig. 2. Trapped air can cause
the pump to cycle unexpectedly, which could result
in serious injury, including splashing in the eyes or
on the skin, injury from moving parts, or contamina-
tion from hazardous fluids.
1. Install the air line accessories as shown in Fig. 2.
Mount these accessories on the wall or on a
bracket. Be sure the air line supplying the acces-
sories is electrically conductive.
a. The fluid pressure can be controlled in two
ways. On the air side, use the pump air regula-
tor (F). On the fluid side, install a fluid regula-
tor (H) near the pump fluid outlet.
b. Locate a bleed-type master air valve (B) close
to the pump, to relieve trapped air. See the
WARNING at left. Locate another air valve (E)
upstream from all air line accessories, to
isolate them during cleaning and repair.
c. Install an air line filter (D) to remove harmful
contaminants such as dirt, moisture, and oil
from the compressed air supply.
2. The air valve does not require lubrication.
3. Install an electrically conductive, flexible air hose
(C) between the accessories and the 1/4 npt(f)
pump air inlet (T). Use a minimum 1/4”(6.3 mm)
ID air hose. Screw an air line quick disconnect
coupler (V) onto the end of the air hose and screw
the mating fitting into the pump air inlet snugly. Do
not connect the coupler to the fitting yet.

309303 9
Installation
KEY
A TRITON 308 Pump
B Bleed-type master air valve
(required for pump)
C Air supply line
D Air line filter
E Air line shutoff valve
F Pump air regulator
G Gun air regulator (used in spray system only)
H Fluid pressure regulator (used in spray
system only)
J Drain/circulation valve
K Drain tube
L Suction tube
M Pump fluid inlet, 3/4 npt(f)
N Pump fluid outlet, 3/8 npt(f)
P Fluid hose (shown connected to gun in spray
system)
R Gun air hose (used in spray system only)
S Spray gun (used in spray system only)
T Pump air inlet, 1/4 npt(f)
U Agitator (used in spray system only)
V Air line quick disconnect
Y Ground wire
ti1007a
Fig. 2
A
P
Wall Mount HVLP Spray Installation Shown
S
R
C
DE
Y
B
H
J
K
L
V
M
N
T
U
Y
B
F
G
K
J
H
L
ti1020a

10 309303
Installation
Fluid Suction Line
DThe pump fluid inlet (M) is 3/4 npt(f). Screw the
suction line (L) into the pump inlet snugly. Use a
compatible liquid thread sealant on connections to
prevent air from getting into the fluid line.
DDo not pressure feed this pump.
DSee the Technical Data on page 24 for maximum
suction lift.
DUse an agitator (U) to prevent fluid from settling
out. Part No. 245081 Agitator Kit (accessory) is
available.
Fluid Outlet Line
WARNING
A fluid drain valve (J) is required in your system to
relieve pressure in the hose if it is plugged. See
Fig. 2. The drain valve reduces the risk of serious
injury, including splashing in the eyes or on the
skin, or contamination from hazardous fluids when
relieving pressure. Install the valve close to the
pump fluid outlet. To use the valve as a circulation
valve, connect a tube (K) between the valve and
pail.
CAUTION
Some systems may require installation of a pressure
relief valve at the pump outlet to prevent overpres-
surization and rupture of the pump or hose.
Thermal expansion of fluid in the outlet line can
cause overpressurization. This can occur when using
long fluid lines exposed to sunlight or ambient heat,
or when pumping from a cool to a warm area (for
example, from an underground tank).
Overpressurization can also occur if the pump is
being used to feed fluid to a piston pump, and the
intake valve of the piston pump does not close,
causing fluid to back up in the outlet line.
DUse electrically conductive fluid hoses (P). The
pump fluid outlet (N) is 3/8 npt(f). Screw the fluid
fitting into the pump outlet snugly.
DInstall a fluid regulator (H) at the pump fluid outlet
to control fluid pressure, if desired. See Air Line,
step 1a, for another method of controlling pressure.
DInstall a fluid drain valve (J) near the fluid outlet.
See the WARNING at left.
Flush the Pump Before First Use
The pump was tested in water. If the water could
contaminate the fluid you are pumping, flush the pump
thoroughly with a compatible solvent. Follow the steps
under Starting and Adjusting the Pump on page 11.