Graco 218-940 Operation manual

INSTRUCTIONS–P ARTS LIST 307–729
Rev H
Supersedes F
This manual contains IMPORT ANT
WARNINGS AND INSTRUCTIONS
READ AND RETAIN FOR REFERENCE
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1444
COPYRIGHT 1985, GRACO INC.
INDEX
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compatibility Chart 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Installation 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 7–11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Chart 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Repair Notes 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly Notes 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repairing the Air Director V alve Assy 8, 9 . . . . . . . . . . . . . . .
Replacing the Diaphragm Shaft Seals 9. . . . . . . . . . . . . . . . . .
Replacing a Diaphragm 10, 1 1. . . . . . . . . . . . . . . . . . . . . . . . .
Repairing the Check V alves 11. . . . . . . . . . . . . . . . . . . . . . . . .
How to Order Replacement Parts 12, 14, 16, 18 . . . . . . . . . . . . . . .
Parts Drawing (Models 218–940, 218–942,
and 220–438) 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List (Models 218–940, 218–942,
and 220–438) 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Drawing (Models 220–434, 220–435,
and 220–436) 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List (Models 220–434, 220–435,
and 220–436) 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Drawing (Model 220–546) 16. . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List (Model 220–546) 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Drawing (Model 220–545) 18. . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List (Model 220–545) 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Diagram 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Performance Data 22, 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data Back Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty Back Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The HUSKY 1030 DIAPHRAGM PUMP
8 bar (120 psi) MAXIMUM WORKING PRESSURE
ALUMINUM MODELS
Model 218–940, Series D
With Buna–N diaphragm
Model 218–942, Series D
With EPDM diaphragm
Model 220–438, Series C
With Polyester Elastomer diaphragm
Model 220–546, Series B
With  (PTFE) diaphragm
ST AINLESS STEEL MODELS
Model 220–434, Series B
With Buna–N diaphragm
Model 220–435, Series B
With EPDM diaphragm
Model 220–436, Series C
With Polyester Elastomer diaphragm
Model 220–545, Series B
With  (PTFE) diaphragm
t
Hazard of Using Fluids Containing Halogenated Hydrocarbons
Never use 1,1,1–trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids containing such solvents in Models
218–940, 218–942, 220–438, and 220–546. Such use could result in a serious chemical reaction, with the possibility of explosion, which could
cause death, serious bodily injury and/or substantial property damage.
Consult your fluid suppliers to ensure that the fluids being used are compatible with aluminum and zinc parts.
WARNING
ALUMINUM MODEL
SHOWN
PTFE
PTFE


SAFETY W ARNINGS
FOR PROFESSIONAL USE ONL Y. OBSERVE ALL W ARNINGS.
Read And Understand All Instruction Manuals Before Operating Equipment.
EQUIPMENT MISUSE HAZARD
General Safety
Any misuse of the equipment or accessories, such as overpressurizing,
modifying parts, using incompatible chemicals and fluids, or using worn
or damaged parts, can cause them to rupture and result in serious bodily
injury, including eye injury , or fire, explosion or property damage.
NEVER alter or modify any part of this equipment; doing so could cause it
to malfunction.
CHECK all equipment regularly and repair or replace worn or damaged
parts immediately .
Take
precautions to avoid a toxic fluid spill. See T OXIC FLUID HAZARD ,
below.
System Pressure
This pump develops 8 bar (120 psi) MAXIMUM WORKING PRESSURE
at 8 bar (120 psi) incoming air pressure. NEVER exceed 8 bar (120 psi)
air pressure to the pump. DO NOT exceed the maximum working pres -
sure
of any component or accessory used in the system.
Fluid Compatibility
BE SURE that all fluids and solvents used are chemically compatible with
the wetted parts shown in the TECHNICAL DA TA on the back page. Al -
ways
read the manufacturer ’ s literature before using fluid or solvent in
this pump.
TOXIC FLUID HAZARD
Improper handling of toxic fluids or inhaling toxic vapors can cause ex -
tremely
serious bodily injury , even death, due to splashing in the eyes,
ingestion, or bodily contamination. Know what fluid you are pumping and
its specific hazards. Store toxic fluid in an appropriate, approved con -
tainer.
Dispose of it according to all Local, State and Federal guidelines
for toxic fluids. Be sure to observe all the following precautions when han -
dling
known or potentially toxic fluids.
1. Always wear appropriate clothing and equipment, such as eye pro -
tection
and breathing apparatus, to protect yourself.
2. Be sure to pipe and dispose of the exhaust air safely . If the dia-
phragm
fails, the fluid will be exhausted along with the air .
3. Be
sure to secure the fluid outlet hose tightly into the receiving con -
tainer
to prevent it from coming loose and improperly draining the
fluid.
SUCTION HAZARD
NEVER place your hands on or near the pump suction inlet. Powerful
suction could cause serious bodily injury .
FIRE OR EXPLOSION HAZARD
Static electricity is created by the flow of fluid through the pump and hose.
If every part of the equipment is not properly grounded, sparking may oc -
cur,
and the system may become hazardous. Sparking may also occur
when plugging in or unplugging a power supply cord. Sparks can ignite
fumes from solvents and the fluid being pumped, dust particles and other
flammable substances, whether you are pumping indoors or outdoors,
and can cause a fire or explosion and serious bodily injury and property
damage. Do not plug in or unplug any power supply cords in the pumping
area when there is any chance of igniting fumes still in the air .
If
you experience any static sparking or even a slight shock while using
this equipment, ST OP PUMPING IMMEDIA TELY. Check the entire sys -
tem
for proper grounding. Do not use the system again until the problem
has been identified and corrected.
Grounding
To reduce the risk of static sparking, ground the pump and all other spray
equipment used or located in the spray area. CHECK your local electrical
code for detailed grounding instructions for your area and type of equip -
ment.
BE SURE to ground all of this spray equipment:
1. Pump: use a ground wire and clamp as shown in Fig 1.
2. Air and fluid hoses: use only grounded hoses with a maximum of
150 m (500 ft) combined hose length to ensure grounding continuity .
3.
Air compressor: according to the manufacturer ’s recommenda-
tions.
4.
All solvent pails used when flushing, according to local code. Use
only
metal pails , which are conductive. Do not place the pail on a
nonconductive surface, such as paper or cardboard, which inter -
rupts the grounding continuity .
5.
Fluid supply container: according to your local code.
To ground the pump:
To ground the pump, loosen the grounding lug locknut (W) and
washer
(X). Insert one end of a 1.5 mm @ (12 ga) minimum ground
wire (Y) into the slot in lug (Z) and tighten the locknut securely . See
Fig 1. Connect the clamp end of the wire to a true earth ground. Refer
to ACCESSORIES on page 20 to order a ground wire and clamp.
Fig 1
WX
Y
Z
IMPORTANT
United States Government safety standards have been adopted under the Occupational Safety and Health Act. These standards – particularly the Gen -
eral
Standards, Part 1910, and the Construction Standards, Part 1926 – should be consulted.

3
COMPATIBILITY CHART
The chart below is only a guide to selecting the pump and
diaphragm material which is compatible with the fluid you
are pumping. Always read and follow the fluid supplier ’s
recommendations
on material and fluid compatibility .
WARNING
To
reduce the risk of serious bodily injury and property
damage from component rupture, always follow these
precautions:
1. Never use fluids in this pump which are not com-
patible with the wetted parts listed in the T echnical
Data
on the back cover of this manual, or with the
diaphragm of this pump.
2. Read and follow all warnings regarding TOXIC
FLUID
HAZARD on page 2.
3. Be sure to avoid contact with heated fluid which
may
burn your skin.
Pumps with Aluminum Covers and Manifolds (Models 218–940, 218–942, 220–438 and 220–546)
Diaphragm
Material
Operating
Temperature
Range
Recommended for pumping: Not recommended for pumping:
Buna–N 0–88_C
(32–190_F)
Water , oil, hydraulic fluids, most
hydrocarbons
Strong alkalies, halogenated hydrocar -
bons, highly polar solvents such as
ketones (acetone, MEK), ozone, alde -
hydes, amines, nitro–hydrocarbons,
esters, ethers
EPDM 0–100_C
(32–212_F)
Alcohols, weak alkalies, esters,
ketones, silicone oils, water , or-
ganic acids, aldehydes, amines
Halogenated hydrocarbons, hydrocar -
bons, silicate esters, ethers, animal
oils, vegetable oils
Polyester
Elastomer
0–100_C
(32–212_F)
Excellent resistance to alcohols,
hydrocarbons, water , silicone and
vegetable oils, organic acids and
alkalies. Good resitance to esters,
ethers and ketones.
Strong alkalies, halogenated hydrocar -
bons, inorganic acids, aldehydes,
most amines, aromatics
r
(PTFE)
0–100_C
(32–212_F)
Most chemicals Halogenated hydrocarbons, very
aggressive acids
Pumps with Stainless Steel Covers and Manifolds (Models 220–434, 220–435, 220–436 and 220–545)
Diaphragm
Material
Operating
Temperature
Range
Recommended for pumping: Not recommended for pumping:
Buna–N 0–88_C
(32–190_F)
Water , oil, hydraulic fluids, most
hydrocarbons
Highly polar solvents such as ketones
(acetone, MEK), ozone, aldehydes,
amines, nitro–hydrocarbons, esters,
ethers
EPDM 0–100_C
(32–212_F)
Alcohols, weak alkalies, esters,
ketones, silicone oils, water , or-
ganic acids, aldehydes, amines
Hydrocarbons, silicate esters, ethers,
animal oils, inorganic acids, vegetable
oils
Polyester
Elastomer
0–100_C
(32–212_F)
Excellent resistance to alcohols,
hydrocarbons, water , silicone and
vegetable oils, organic acids and
alkalies. Good resitance to esters,
ethers and ketones.
Inorganic acids, aldehydes, most
amines, aromatics
r
(PTFE)
0–100_C
(32–212_F)
Most chemicals V ery aggressive acids
PTFE
PTFE

4
TYPICAL INST ALLATION
Fig. 2
KEY
ABleed–Type
Master Air V alve
B
Air Line Filter
C Main Air Line
D Air Regulator
E Air Line Lubricator
F Grounded Air Hose
G Pump Air Inlet
H Holding T ank
J
Grounded T ransfer Hose
K Fluid Outlet
L Suction Hose
M Fluid Inlet
P Air Control V alve
Y
Ground Wire
F
C
K
J
ADA
G, P
E
M
Y
B
H
L
FLUID OUTLET
FLUID INLET FLUID INLET
GROUNDED AIR HOSE
(REQUIRED)
MUFFLER
P
.N. 108–271
(SEE ACCESSORIES)
DRUM
P .N. 108–272
(SEE
ACCESSORIES)
V
enting Exhaust Air
AIR
ABOVE GROUND INSTALLATION
DET AIL A (SUBMERGED INST ALLATION)
DET AIL B (DUAL INLET KIT 220–986)
DET AIL C (W ALL MOUNTING)

5
INSTALLATION
NOTE: The T ypical Installation on page 4 is only a guide
to selecting and installing system components.
Your installation will depend on the type of fluid
being
pumped and your application needs. Con -
tact
your Graco distributor for system design as -
sistance.
The
accessories mentioned in the text are avail -
able
from Graco. See page 20.
Reference numbers and letters in parentheses
in
the text refer to the callouts on the drawings.
Mount the pump to suit the type of installation planned.
Be
sure the pump is securely bolted to its mounting.
If mounting the pump on a wall, you must reposition the
legs so the pump will be upright. Remove the long bolts
(3, or 55 on models), nuts (15) and washers (16)
holding
the legs (12, 13) in place. Remove two short bolts
(14, or 3 on models), nuts (15) and washers (16)
from
each diaphragm cover (1 1).
Align
the legs with these vacant holes and reinstall using
the long bolts, washers, and nuts. Reinstall the short
bolts in the holes vacated by the legs. T orque the bolts
oppositely
and evenly , to 13.5–16 N.m (9.8–12 ft–lb). On
models, torque the long bolts (55) to 13.5–16 N.m
(9.8–12 ft–lb); torque the short bolts (3) to 27 N.m (20 ft–
lb). See Detail C in Fig. 2 and the Mounting Diagram on
page 21.
Screw an air control valve (P) and adapter into the pump
air inlet (G). W orking upstream from the air control valve
(P), first install an air line lubricator (E), for automatic lu -
brication
of the air director valve assembly . Next, install a
bleed–type master air valve (A), an air regulator (D) to
control
pump speed and fluid pressure, and an air line fil -
ter
(B) to remove harmful dirt and moisture from the com -
pressed air supply. Install another bleed–type air valve
(A)
to isolate the accessories for servicing.
WARNING
A bleed–type master air valve (A) is required in your
system to relieve air trapped between this valve and
the pump after the air regulator is closed. Trapped
air can cause the pump to cycle unexpectedly,
which could result in serious bodily injury , including
splashing in the eyes, injury from moving parts, or
contamination
from toxic fluids.
Connect a grounded air supply hose (F) to the air control
valve (P). The hose must be at least 6 mm (1/4 in.) ID.
The fluid connections are 1 in. npt(f). Connect a
grounded transfer hose (J) to the pump fluid outlet (K).
Connect a fluid suction hose (L) to the pump fluid inlet
(M).
Be sure the fluid connections are tight to avoid leaks.
NOTE: Do not pressure feed the pump. The ball checks
will not function and the pump will not operate.
NOTE: The inlet and outlet manifolds can be removed
and turned 180 _ to change the direction the
ports face. Refer to Repairing the Check
Valves
on page 1 1 for the procedure.
Dual Inlet Conversion Kit 220–986
Order Conversion Kit 220–986 to convert Pump Model
218–940
to a dual inlet design, allowing you to pump and
mix two fluids in a 1:1 ratio. Each of the two diaphragm
chambers
pumps one of the fluids, and the common out -
let aids the mixing process. However since the two dia-
phragms
pump alternately , additional plumbing is neces -
sary
to ensure complete mixing.
The outlet line should be at least 1 in. diameter tubing or
3/4 in. pipe. Runs shorter than 45 m (150 ft) should use a
100 mm (4 in.) diameter x 0.9 m (36 in.) mixing chamber
fabricated of schedule 40 pipe.
The inlet plumbing and suction lift to the dual inlet pump
must meet certain specifications so the volume of the two
fluids supplied to the pump remains equal, to ensure
proper 1:1 proportioning. The inlet lines must be the
same diameter and length, with the same number of
bends or elbows. The lift requirements of the two inlets
can vary within a range of 0.45 m (18 in.). Use a float
valve
set at the 0.45 m (18 in.) level of one of the fluid sup -
ply
tanks to ensure that the lift requirement is maintained.
Stainless Steel Ball Conversion Kit 220–987
High density fluids may keep the check balls from seating
and the pump will not operate. The heavier stainless steel
balls supplied in Conversion Kit 220–987 will seat when
you are pumping these fluids.
Air Exhaust V entilation
WARNING
Be sure to read and follow the warnings and precau -
tions regarding TOXIC FLUID HAZARD and FIRE
OR
EXPLOSION HAZARD on page 2, before oper -
ating
this pump.
Be sure the system is properly ventilated for your
type
of installation.
If you are pumping flammable, hazardous or toxic flu -
ids, operating the pump submersed, or operating the
pump in an enclosed area, position the pump so as to
avoid
exhausting air toward people; the exhaust air must
be vented to a safe area, away from all people. Y ou
MUST use a grounded air hose (see “ Grounding” be-
low). The exhaust line should end in a container which
can catch any fluid that would be exhausted if a dia-
phragm
ruptured. See Detail A, Fig. 2, and the ACCES-
SORIES section on page 20 to order the necessary
plumbing.
Grounding
WARNING
This pump must be grounded. Be sure to read and
follow the warnings and precautions regarding FIRE
OR
EXPLOSION HAZARD on page 2 before oper -
ating
this pump.
To reduce the risk of static charge build–up on the
muffler which can cause static sparking, the ex-
haust
line MUST be a grounded air hose.
PTFE
PTFE
PTFE

6
OPERATION
WARNING
NEVER place your hands on or near the pump
suction
inlet. Powerful suction could cause serious
bodily injury .
Flush the Pump Before Using
This pump was tested in water containing an oil–based
rust inhibitor. If this solution could contaminate or react
negatively
with the fluid you are pumping, flush the pump
thoroughly with a compatible solvent.
Starting and Adjusting the Pump
Place the suction tube in the fluid to be pumped. Place
the
transfer hose in the appropriate container . Be sure all
fittings are securely tightened. Open the bleed–type
master
air valve (A). Slowly open the air control valve (P)
until the pump just starts to cycle. Allow the pump to cycle
slowly until all air has been pushed out of the lines. Then
open the air control valve only as far as necessary to get
the desired results.
WARNING
NEVER exceed 8 bar (120 psi) air supply pressure
to the pump. Read the warning section EQUIP-
MENT
MISUSE HAZARD on page 2.
If your pump accelerates quickly or is running too fast,
stop
it immediately . A dry pump will quickly accelerate to
a high speed and may damage itself. If the supply con-
tainer
is empty , refill it and prime the pump, being sure to
remove all air from the pump and lines, or flush the pump.
Shutdown and Care of the Pump
To shut of f the pump, close the bleed–type master air
valve
(A) and close the air control valve (P).
If the fluid you are pumping tends to dry or set up when it
is not moving, flush the pump as often as necessary to
prevent
the fluid from drying in the pump. Drain the pump
thoroughly before storing it.

7
TROUBLESHOOTING CHART
Pressure Relief Procedure
To reduce the risk of serious bodily injury , including splashing fluid or solvent in the eyes or on the skin, always
shut of f the air to the pump, open the fluid control valve, if used, and open the drain valve, to relieve all system
pressure before checking, adjusting, cleaning or repairing any part of the system.
WARNING
PROBLEM CAUSE SOLUTION
Pump
will not cycle or cycles once Sticky air director valve (52). 1. Check both spools for
and stops. freedom of movement;
clean, oil, or replace.
2. Inspect actuator pin (27) and
diaphragm shaft (1) for
damage.
Clogged air or fluid passageway . Clear.
Air director valve caps (30, 33) or Check and correct. See page 8.
plates (23, 37) installed incorrectly
or worn.
Pump cycles at stall or fails to hold Leaky check valves (18). Repair or replace. See page 1 1.
pressure at stall.
W orn shaft seals (4). Replace. See page 9.
Loose fluid fitting. Check and correct.
W orn air director valve (52). Repair or replace. See page 8.
Pump operates erratically . Clogged or leaking suction line. Inspect for leaks, or clear .
Sticky air director valve (52). Check. See page 8.
Sticky check valve balls (19). Clean or repair . See page 1 1.
Diaphragm (7) damaged. Replace. See page 10.
Air bubbles in fluid. Suction line loose. Tighten.
Fluid inlet seals worn or damaged. Check; repair .
Diaphragm (7) ruptured. Replace. See page 10.
Fluid in exhaust air . Diaphragm plate (8) loose. Tighten.
Diaphragm (7) ruptured. Replace. See page 10.
Pump exhausts excessive air Air director valve screws (22, 35, 39) Tighten.
at stall. loose.
Air director valve caps (30, 33) Inspect; replace. See page 8.
damaged.
W
orn or damaged air director Repair or replace. See page 8.
valve (52).
W orn shaft seals (4). Inspect; replace. See page 9.
Pump leaks fluid externally from W orn or damaged o–rings (17). Inspect; replace. See page 1 1.
check valves.
Manifold bolts (14) loose. Tighten.
Pump won’t prime or won’t Suction line loose. Tighten.
hold prime.
Excessive suction lift. Shorten.
Inlet check balls (19) worn. Replace. See page 1 1.
Suction line clogged. Clear.
Outlet line clogged or dispense device Clear or open.
closed.
NOTE: Check all other possible remedies before disassembling the pump.

8
SERVICE
Pump Repair Notes
1. Shut of f the air to the pump, close the air control valve
and the bleed–type master air valve.
2. Disconnect the air and fluid hoses.
Reassembly Notes
1. The pump is marked with cast–in arrows ( Y ). Fig. 3
shows the location and direction the arrows must
face
for proper reassembly .
2. The outlet manifold (on top of the pump) is marked
GRACO; the inlet manifold has no special markings.
Fig. 3
1” NPT
FLUID
OUTLET
1” NPT
FLUID
INLET
1/4 NPT
AIR INLET
CAST–IN
ARROW
CAST–IN
ARROWS
Repairing the Air Director V alve Assembly
(See Fig. 4)
NOTE: The air director valve assembly (52) is replace-
able
as a unit. Perform steps 1–3, then reassem -
ble using the new valve assembly (steps 14–18).
To disassemble and repair the existing air direc -
tor
valve assembly , perform steps 1–18.
1. Remove the screws (35) and washers (36). Gently
tap the air inlet plate (37) from the top and bottom
with a plastic mallet to help loosen the assembly .
Then
pull the assembly out of the pump housing.
2. Remove the valve caps (30 and 33).
3. Use a 5 mm hex key wrench to remove the screws
(39) from the valve block (32). Then remove the air
inlet
gasket (38) and plate (37).
4. Unscrew the actuator pin (27), then slide the pilot
valve
spool (28) out of the block (32).
5. Use a 3 mm hex key wrench to remove the four
screws
(22). T ap the slide valve plate (23) with a plas -
tic
mallet to loosen it, then remove the plate, gasket
(24), slide valve (25), and spring (26) from the valve
block (32).
6. Slide
the valve spool (31) out of the valve block (32).
Check the o–rings (29) carefully and replace, if nec -
essary.
7. Clean all parts thoroughly and inspect for wear or
damage.
If the pilot valve bore (S) has nicks, burrs, or
excessive wear , replace the valve block (32). Clean
the threads of the actuator pin (27) and the threads
inside the pilot valve spool (28) to remove the old
thread
sealant.
Fig. 4
35
36
REF 32
39
38
37
33
24
23 22
25
27
REF 27
28
30
2931
29
32
GREASE
RECESS
GREASE
OUTSIDE OF
CAPS (30, 33) AND
SPRING (26) BEFORE
REASSEMBLING
SLOT
TORQUE TO
3.4–4.5 N.m
(2.5–3.3 ft–lb)
TORQUE TO
6.8–7.9 N.m
(5–5.8 ft–lb)
TORQUE TO
8.5–9.5 N.m
(6.2–7 ft–lb)
S
APPL Y LOCTITE r NO. 222
TO THREADS
26

9
8. Lubricate
all parts before reassembling.
9. Slide the pilot valve spool (28) into the bore (S). Apply
a drop of Loctite  No. 222 to the threads of the actua -
tor
pin (27). Screw the pin into the spool. Use the pin
to move the spool back and forth to be sure the spool
moves freely .
CAUTION
Excessive Loctite will damage the spool and
cause
premature failure.
10. Slide the valve spool (31) into the block so the flat
section
faces the rectangular opening in the block.
11. Grease the spring (26) and place it in the valve spool
recess. Position the slide valve (25) over the spring,
so the spring fits into the spring recess in the bottom
of the slide valve.
12. Place a new gasket (24) on the slide valve plate (23).
Place the plate on the valve block (32), making sure
the slots on the edge of the plate face the same way
as the actuator pin (27).
13. Install the screws (22) and torque to 3.4–4.5 N.m
(2.5–3.3
ft–lb).
14. Position the air inlet gasket (38) and the plate (37) on
the valve block (32). Install the screws (39) and
torque
to 6.8–7.9 N.m (5–5.8 ft–lb).
15. Install the right and left valve caps (30 and 33) on the
valve block, matching the holes in the caps and the
slide
valve plate (23).
16. Look in the pump housing (2) to check the position of
the diaphragm shaft (1). Slide the actuator pin (27) so
that it will enter the pump housing toward the small
diameter of the shaft to prevent damaging the
shaft.
See Fig. 5.
CAUTION
Incorrect positioning of the actuator pin can cause
serious damage to the diaphragm shaft, including
bending the shaft.
Fig. 5
27
51
SMALL DIAMETER
OF SHAFT
AIR DIRECT OR VALVE
ASSEMBLY
17. Lubricate the outside of the valve caps (30 and 33)
with
light grease. Guide the air director valve assem -
bly (52) into the pump housing (2), so the arrow on
the
inlet plate (37) faces the arrow on the pump hous -
ing.
18. Tap
the air inlet plate (37) with a plastic mallet to help
align the screw holes of the plate and pump housing
(2). Install a screw (35) and washer (36) to check the
alignment; adjust as necessary . Loosely install a
screw
and washer in the opposite corner . Then install
the remaining screws and washers. Using an oppo -
site
and alternate pattern, torque the screws evenly
to 8.5–9.5 N.m (6.2–7 ft–lb).
T o Check the Air Director V alve Assembly
19. Be sure the air control valve (P) is turned of f, then
connect
the air supply line.
20. Open the bleed–type master air valve, then open the
air control valve slowly; the pump should cycle.
21. If the pump does not start, check to be sure (a) that
the pin (27) was moved to the small diameter of the
shaft, (b) that you installed the air director valve as -
sembly
correctly , and (c) that you assembled the air
valve correctly .
Replacing the Diaphragm Shaft Seals (See Fig. 6)
1. Remove the screws (35) and washers (36). Gently
tap the air inlet plate (37) from the top and bottom
with a plastic mallet to help loosen the air director
valve assembly (52). Then pull the assembly out of
the
pump housing.
2. Disassemble the diaphragm covers and diaphragms
as instructed in Replacing a Diaphragm , steps 1–7.
3. Inspect the shaft (1), the bushings (51, see Figs. 5
and
6) inside the pump housing (2), and the seals (4)
for wear or damage. Replace parts as needed.
4. Install the new seal (4) so the lips of the seal face out
of the pump housing (2). Press the seal in with your
fingers; do not use any tools which could damage the
seal.
5. Reassemble the diaphragms as instructed in Re-
placing
a Diaphragm , steps 8–19.
6. Look in the pump housing (2) to check the position of
the diaphragm shaft (1). Slide the actuator pin (27) so
that it will enter the pump housing t oward the small
diameter of the shaft to prevent damaging the
shaft.
See Fig. 5.
CAUTION
Incorrect positioning of the actuator pin can cause
serious damage to the diaphragm shaft, including
bending the shaft.
7. Lubricate the outside of the valve caps (30 and 33)
with
light grease. Guide the air director valve assem -
bly (52) into the pump housing (2), so the arrow on
the
inlet plate (37) faces the arrow on the pump hous -
ing.

10 
8. Tap
the air inlet plate (37) with a plastic mallet to help
align the screw holes of the plate and pump housing
(2). Install a screw (35) and washer (36) to check the
alignment; adjust as necessary . Loosely install a
screw
and washer in the opposite corner . Then install
the remaining screws and washers. Using an oppo -
site
and alternate pattern, torque the screws evenly
to 8.5–9.5 N.m (6.2–7 ft–lb).
Replacing a Diaphragm (See Fig. 6)
NOTE: Diaphragm Repair Kits are available for each of
the diaphragm materials. Refer to the parts list
for
your pump.
To convert a buna–N, polyester elastomer , or
EPDM
diaphragm pump to a  Model, or -
der
Conversion Kit 222–373. Refer to the
parts list for your pump.
1. Remove the pump from its mounting.
2. Remove the bolts (14), washers (16) and nuts (15)
from
the outlet manifold (20).
3. Tap the manifold with a plastic mallet to free it from
the pump. Remove all four o–rings (17), the valve
seat plates (18) and the balls (19, or 57 on Models
218–940
and 220–434).
4. Turn the pump over. Repeat as in steps 2 and 3 for
the
inlet manifold (21).
5. Remove the bolts (14, 3, or 55), legs (12 or 13),
washers
(16) and nuts (15) from the diaphragm cov -
ers (1
1) on each side of the pump.
6. Hold the fluid side support plate (8) on one end of the
pump and loosen and remove the plate (8) on the
other end of the pump. Remove the diaphragm (7),
backup diaphragm (53, Models 220–545 and
220–546
only), air side support plate (6) and stop (5).
NOTE: The diaphragm shaft (1) does not have to be re -
moved
from the pump housing when replacing a
diaphragm.
CAUTION
Never try to pull the diaphragm shaft (1) through
the pump unless the air director valve assembly
has
been removed. If you do, the actuator pin (27)
in the air director valve assembly will be damaged.
Fig. 6
12
11
1
4
51 215 16 40
20 14
17*
19* or 57*
18
17*
14
13
12
15
16
6
45
16
15
35
36
21
14
16
17*
18
19*
17*
16
15
CHAMFERED
SIDE
F ACES
BALL
TORQUE TO
27 N.m
(20 ft–lb)
TORQUE TO
8.5–9.5 N.m
(6.2–7 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
42–47 N.m
(30–35 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
27 N.m
(20 ft–lb)
13
16
51
CHAMFERED
SIDE F ACES
BALL
3 (or 55 on Models
220–545 and 220–546)
(3 on Models
220–545 and
220–546)
TORQUE T O
27 N.m
(20 ft–lb)
53 (Models
220–545 and
220–546 Only)
7
FLUID
OUTLET
FLUID
INLET
52 8
PTFE
PTFE

11
7. Hold
the flats on the free end of the diaphragm shaft
with a wrench. Loosen and remove the fluid side sup -
port plate (8) on the other side of the pump. Disas-
semble
the diaphragm assembly as in step 6.
8. Clean all parts thoroughly . Check for wear or damage
and replace parts as needed. Lubricate the parts with
light motor oil for easier reassembly. On each fluid
side
support plate (8), grease the rounded side which
faces the diaphragm.
9. Place a stop (5) on the shaft so the slots face into the
pump housing (2). Install the air side support plate (6)
so the rounded side faces out. Install the backup dia -
phragm (53, Models 220–545 and 220–546 only),
and
the diaphragm (7) so the side marked AIR SIDE
faces the plate (6). Install the fluid side support plate
(8). See Fig. 7.
Fig. 7
1
5
6
8
7
53
Models 220–545 and
220–546 only
Bright
Colored
Plate
Dull
Colored
Plate
10. Install the diaphragm on the other side of the pump in
the same way .
11. Align
the holes in the diaphragm with the holes in the
flanges of the housing (2). Then, without losing the
alignment,
torque the fluid side support plates (8) to
42–47 N.m (30–35 ft–lb).
12. Position the diaphragm covers (1 1) over the dia-
phragms
so the cover arrows ( Y ) point upward . Also
align the holes in the diaphragm, housing and cover .
CAUTION
Be very careful when installing the cover bolts that
you do not twist the diaphragm. Twisting the dia-
phragm prevents it from sealing between the
cover
and housing and the pump will leak.
13. Loosely install the longer cover bolts (3, or 55 on
Models), and the legs (12 and 13), washers (16)
and nuts (15) to the bottom of the cover .
14. Loosely
install the bolts (14, or 3 on Models),
with washers and nuts, to the cover (1 1).
15. Using an opposite and alternate pattern, torque the
bolts
evenly to 13.5–16 N.m (9.8–12 ft–lb). On
Models
220–545 and 220–546, torque the bolts (55)
securing the legs to 13.5–16 N.m (9.8–12 ft–lb);
torque
the other cover bolts (3) to 27 N.m (20 ft–lb).
16. Be sure the mating surfaces of the pump housing
and
the manifolds are clean.
17. Working on the inlet side (bottom) first (arrow on dia -
phragm
cover will face down), install an o–ring (17),
ball (19), valve seat plate (18) and another o–ring
(17)
on each side of the housing (2).
NOTE: Be sure the chamfered side of the valve seat
faces the ball.
18. Install the inlet manifold (21) on the pump housing
with
the bolts (14), a washer (16) on each end of the
bolt, and the nuts (15). T orque the bolts to 27 N.m (20
ft–lb).
19. Turn
the pump over to the outlet side (top). Install an
o–ring (17), valve seat plate (18) with chamfer facing
the ball, ball (19, or 57 on Models 218–940 and
220–434), and another o–ring (17) on each side of
the
housing (2). Install the outlet manifold (20) as in
step 18.
Repairing the Check V alves (See Fig. 6)
NOTE: Check Valve Repair Kits are available. The kits
include four balls and eight o–rings, and are
available
in buna–N/Delrin r , EPDM, and r
(PTFE).
Refer to the parts list for your pump.
1. Remove the bolts (14), washers (16) and nuts (15)
from
the outlet manifold (20).
2. Tap the manifold with a plastic mallet to free it from
the pump. Remove all four o–rings (17), the valve
plate seats (18) and the balls (19, or 57 on Models
218–940
and 220–434).
3. Turn the pump over and remove the inlet manifold
(21),
o–rings (17), seats (18) and balls (19).
4. Clean the manifolds and all mating parts thoroughly .
Check
the o–rings, plates and balls for nicks or wear ,
and
replace as needed.
5. Working on the inlet side (bottom) first (arrow on dia -
phragm
cover will face down), install an o–ring (17),
ball (19), valve seat plate (18) and another o–ring
(17)
on each side of the housing (2).
NOTE: Be sure the chamfered side of the valve seat
faces the ball.
6. Install the inlet manifold on the pump housing with
the
bolts (14), a washer (16) on each end of the bolt,
and the nuts (15). T orque the bolts to 27 N.m (20 ft–
lb).
7. Turn
the pump over . Install an o–ring (17), valve seat
plate (18) with chamfer facing the ball, the ball (19, or
57 on Models 218–940 and 220–434), and another
o–ring
(17) on each side of the housing (2). Install the
outlet manifold (20) as in step 6.
PTFE
PTFE
PTFE
PTFE

12 
PARTS DRA WING (Aluminum Models)
Model 218–940, Series D
With Buna–N Diaphragm
Includes items 1–57
Model 218–942, Series D
With EPDM Diaphragm
Includes items 1–52
Model 220–438, Series C
With Polyester Elastomer Diaphragm
Includes items 1–52
3
13
12 11
1
4
51 215 16 40
20
47
14
16
17*
19* or 57*
18
17* 14
13
3
12
46
15
16
8
6
45
39
16
15
33
30
38
37
35
36
21
14
16
17*
18
19*
17*
48,49
16
15
11
52
(Includes
items 22–33)
See Detail E
CHAMFERED
SIDE F ACES
BALL
TORQUE TO
27 N.m
(20 ft–lb)
TORQUE TO
8.5–9.5 N.m
(6.2–7 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
6.8–7.9 N.m
(5–5.8 ft–lb)
TORQUE TO
42–47 N.m
(30–35 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
27 N.m
(20 ft–lb)
CHAMFERED
SIDE F ACES
BALL
7*
51
44
23 22
24
25
26
32
29
29
31
REF
27
28
27
TORQUE T O
3.4–4.5 N.m
(2.5–3.3 in–lb)
DETAIL E
HOW T O ORDER P ARTS
1 To be sure you receive the correct replacement parts, kits or
accessories, always give all of the information requested in the
chart
below .
2. Check the parts list to identify the correct part number; do not use
the ref. no. when ordering.
3. Order all parts from your nearest Graco distributor .
6 digit
Part Number Qty Part Description

13
PARTS LIST (Aluminum Models)
Model 218–940, Series D
With Buna–N Diaphragm
Includes items 1–57
Model 218–942, Series D
With EPDM Diaphragm
Includes items 1–52
Model 220–438, Series C
With Polyester Elastomer Diaphragm
Includes items 1–52
REF PART DESCRIPTION QTY
NO. NO.
1 108–248 SHAFT
, diaphragm 1
2 108–252
HOUSING, pump
(includes item 51) 1
3 108–574 BOLT
, M8 x 40 8
4 108–250
SEAL, shaft 2
5 108–249 STOP
, diaphragm 2
6 110–032 PLA
TE, support, air side 2
7 108–244*
DIAPHRAGM, buna–N
(Model 218–940 only) 2
108–465*
DIAPHRAGM, polyester elastomer
(Model 220–438 only) 2
108–273*
DIAPHRAGM, EPDM
(Model 218–942 only) 2
8 110–280 PLA
TE, support, fluid side;
316 sst 2
11 108–579
COVER, diaphragm; aluminum 2
12 185–409
LEG, left hand 2
13 185–410
LEG, right hand 2
14 108–391 BOLT
, M8 x 35 16
15 105–329 NUT
, M8 24
16 104–421 W
ASHER, M8 32
17 108–625*
O–RING, valve seat; buna–N
(Model 218–940 only) 8
108–627*
O–RING, valve seat; EPDM
(Model 218–942 only) 8
108–628*
O–RING, valve seat;
polyester elastomer
(Model 220–438 only) 8
18 108–242 PLA
TE, valve seat; 316 sst 4
19 108–240*
BALL, inlet and outlet;
r (PTFE)
(Model 220–438 only) 4
108–746*
BALL, inlet and outlet; EPDM
(Model 218–942 only) 4
108–745*
BALL, inlet; buna–N (black)
(Model 218–940 only) 2
20 108–581
MANIFOLD, top (outlet);
aluminum 1
21 108–582
MANIFOLD, bottom (inlet);
aluminum 1
22 108–254 SCREW
, socket, M4 x 20 4
23 108–257 PLA
TE, slide valve 1
24 108–260 GASKET
, slide valve 1
25 108–261 VAL
VE, slide 1
26 108–262
SPRING, air valve 1
27 108–268
PIN, actuator , air valve 1
28 108–267
SPOOL, valve, pilot 1
29 154–771
O–RING; buna–N 2
30 108–256 CAP
, valve, right hand 1
31 108–263
SPOOL, valve 1
32 108–264
BLOCK, valve 1
33 108–255 CAP
, valve, left hand 1
35 108–253 SCREW
, M6 x 20 4
36 110–035 W
ASHER, M6 4
37 109–043 PLA
TE, air inlet 1
38 108–258 GASKET
, air inlet 1
39 108–265 SCREW
, socket, M6 x 35 3
REF PART DESCRIPTION QTY
NO. NO.
40 108–274 MUFFLER 1
44 179–944**
LABEL, warning, suction 1
46 181–211**
LABEL, warning, HHC 1
47 181–212**
LABEL, warning, exhaust 1
48 104–582 W
ASHER, tab 1
49 104–029
LUG, grounding 1
51 108–251 BUSHING 2
52 108–766
AIR DIRECT OR V AL VE ASSY
Includes items 22–33 1
57 110–263*
BALL, outlet; Delrin r (white)
(Model
218–940 only) 2
* Included in repair kits. See below .
** Additional
warning labels and tags are available at no
extra charge.
CHECK V AL VE REP AIR KITS
(Must be purchased separately)
220–988 r (PTFE)
220–989 Buna–N/Delrinr
220–990 EPDM
Consist of:
Ref. No. Qty
17
8
19 4 (2 in 220–989)
57 2 (220–989 only)
DIAPHRAGM REP AIR KITS
(Must be purchased separately)
220–981 Polyester Elastomer
220–982 EPDM
220–983 Buna–N
Consist of:
Ref. No. Qty
7
2
r CONVERSION KIT 222–373
Part No. Description Qty
110–279 PLA
TE, support, fluid side 2
108–576
DIAPHRAGM, (PTFE) 2
108–847
DIAPHRAGM, backup 2
108–587 P
ACKING, o–ring 8
110–036 BOLT
, M8 x 45 8
108–240
BALL, (PTFE) 4
405–891
LABEL, instruction 1
PTFE
PTFE
PTFE
PTFE
PTFE

14 
PARTS DRA WING (Stainless Steel Models)
Model 220–434, Series B
With Buna–N Diaphragm
Includes items 1–57
Model 220–435, Series B
With EPDM Diaphragm
Includes items 1–52
Model 220–436, Series C
With Polyester Elastomer Diaphragm
Includes items 1–52
312 11
1
4
51 215 16 40
20 47
14
16
17*
19* or 57*
18
17* 14
13
3
12
15
16
8
7
6
45
39
16
15
33
30
38
37
35
36
21
14
16
17*
18
19*
17*
48,49
16
15
11
52
(Includes
items 22–33)
See Detail E
CHAMFERED
SIDE
F ACES
BALL
TORQUE TO
27 N.m
(20 ft–lb)
TORQUE TO
8.5–9.5 N.m
(6.2–7 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
6.8–7.9 N.m
(5–5.8 ft–lb)
TORQUE TO
42–47 N.m
(30–35 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
27 N.m
(20 ft–lb)
13
CHAMFERED
SIDE F ACES
BALL
51
44
23 22
24
25
26
32
29
29
31
REF 27
28
27
TORQUE T O
3.4–4.5 N.m
(2.5–3.3 in–lb)
DETAIL E
HOW T O ORDER P ARTS
1 To be sure you receive the correct replacement parts, kits or
accessories, always give all of the information requested in the
chart
below .
2. Check the parts list to identify the correct part number; do not use
the ref. no. when ordering.
3. Order all parts from your nearest Graco distributor .
6 digit
Part Number Qty Part Description

15
PARTS LIST (Stainless Steel Models)
Model 220–434, Series B
With Buna–N Diaphragm
Includes items 1–57
Model 220–435, Series B
With EPDM Diaphragm
Includes items 1–52
Model 220–436, Series C
With Polyester Elastomer Diaphragm
Includes items 1–52
REF PART DESCRIPTION QTY
NO. NO.
1 108–248 SHAFT
, diaphragm 1
2 108–252
HOUSING, pump
(includes item 51) 1
3 108–574 BOLT
, M8 x 40 8
4 108–250
SEAL, shaft 2
5 108–249 STOP
, diaphragm 2
6 110–032 PLA
TE, support, air side 2
7 108–244*
DIAPHRAGM, buna–N
(Model 220–434 only) 2
108–465*
DIAPHRAGM, polyester elastomer
(Model 220–436 only) 2
108–273*
DIAPHRAGM, EPDM
(Model 220–435 only) 2
8 110–280 PLA
TE, support, fluid side;
316 sst 2
11 108–580
COVER, diaphragm; 316 sst 2
12 185–409
LEG, left hand 2
13 185–410
LEG, right hand 2
14 108–391 BOLT
, M8 x 35 16
15 105–329 NUT
, M8 24
16 104–421 W
ASHER, M8 32
17 108–625*
O–RING, valve seat; buna–N
(Model 220–434 only) 8
108–627*
O–RING, valve seat; EPDM
(Model 220–435 only) 8
108–628*
O–RING, valve seat;
polyester elastomer
(Model 220–436 only) 8
18 108–242 PLA
TE, valve seat; 316 sst 4
19 108–240*
BALL, inlet and outlet;
 (PTFE)
(Model 220–436 only) 4
108–746*
BALL, inlet and outlet; EPDM
(Model 220–435 only) 4
108–745*
BALL, inlet; buna–N (black)
(Model 220–434 only) 2
20 108–583
MANIFOLD, top (outlet);
316 sst 1
21 108–584
MANIFOLD, bottom (inlet);
316 sst 1
22 108–254 SCREW
, socket, M4 x 20 4
23 108–257 PLA
TE, slide valve 1
24 108–260 GASKET
, slide valve 1
25 108–261 VAL
VE, slide 1
26 108–262
SPRING, air valve 1
27 108–268
PIN, actuator , air valve 1
28 108–267
SPOOL, valve, pilot 1
29 154–771
O–RING; buna–N 2
30 108–256 CAP
, valve, right hand 1
31 108–263
SPOOL, valve 1
32 108–264
BLOCK, valve 1
33 108–255 CAP
, valve, left hand 1
35 108–253 SCREW
, M6 x 20 4
36 110–035 W
ASHER, M6 4
37 109–043 PLA
TE, air inlet 1
38 108–258 GASKET
, air inlet 1
REF PART DESCRIPTION QTY
NO. NO.
39 108–265 SCREW
, socket, M6 x 35 3
40 108–274 MUFFLER 1
44 179–944**
LABEL, warning, suction 1
47 181–212**
LABEL, warning, exhaust 1
48 104–582 W
ASHER, tab 1
49 104–029
LUG, grounding 1
51 108–251 BUSHING 2
52 108–766
AIR DIRECT OR V AL VE ASSY
Includes items 22–33 1
57 110–263*
BALL, outlet; Delrin  (white)
(Model 220–434 only) 2
* Included in repair kits. See below .
** Additional
warning labels and tags are available at no
extra charge.
CHECK V AL VE REP AIR KITS
(Must be purchased separately)
220–988  (PTFE)
220–989 Buna–N/Delrin
220–990 EPDM
Consist of:
Ref. No. Qty
17
8
19 4 (2 in 220–989)
57 2 (220–989 only)
DIAPHRAGM REP AIR KITS
(Must be purchased separately)
220–981 Polyester Elastomer
220–982 EPDM
220–983 Buna–N
Consist of:
Ref. No. Qty
7
2
 CONVERSION KIT 222–373
Part No. Description Qty
110–279 PLA
TE, support, fluid side 2
108–576
DIAPHRAGM, (PTFE) 2
108–847
DIAPHRAGM, backup 2
108–587 P
ACKING, o–ring 8
110–036 BOLT
, M8 x 45 8
108–240
BALL, (PTFE) 4
405–891
LABEL, instruction 1
PTFE
PTFE
PTFE
PTFE
PTFE

16 
PARTS DRA WING (Aluminum Models)
Model 220–546, Series B
With  (PTFE) Diaphragm
Includes items 1–55
12 11
1
4
51 215 16 40
20 47
14
17*
19*
18
17*
13
12
46
15
16
8
6
45
39
16
15
33
30
38
37
35
36
21
14
16
17*
18
19*
17*
48,49
16
15
11
52
(Includes
items 22–33)
See Detail E
CHAMFERED
SIDE
F ACES
BALL
TORQUE TO
27 N.m
(20 ft–lb)
TORQUE TO
8.5–9.5 N.m
(6.2–7 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
6.8–7.9 N.m
(5–5.8 ft–lb)
TORQUE TO
42–47 N.m
(30–35 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
27 N.m
(20 ft–lb)
TORQUE TO
27 N.m
(20 ft–lb)
13
16
51
CHAMFERED
SIDE F ACES
BALL
53*
44
7*
55
3
55
23 22
24
25
26
32
29
29
31
REF
27
28
27
TORQUE T O
3.4–4.5 N.m
(2.5–3.3 in–lb)
DETAIL E
HOW T O ORDER P ARTS
1 To be sure you receive the correct replacement parts, kits or
accessories, always give all of the information requested in the
chart
below .
2. Check the parts list to identify the correct part number; do not use
the ref. no. when ordering.
3. Order all parts from your nearest Graco distributor .
6 digit
Part Number Qty Part Description
PTFE

17
PARTS LIST (Aluminum Models)
Model 220–546, Series B
With r (PTFE) Diaphragm
Includes items 1–55
REF PART DESCRIPTION QTY
NO. NO.
1 108–248 SHAFT
, diaphragm 1
2 108–252
HOUSING, pump
(includes item 51) 1
3 108–574 BOLT
, M8 x 40 8
4 108–250
SEAL, shaft 2
5 108–249 STOP
, diaphragm 2
6 110–032 PLA
TE, support, air side 2
7 108–576*
DIAPHRAGM, r (PTFE) 2
8 110–279 PLA
TE, support, fluid side;
316 sst 2
11 108–579
COVER, diaphragm; aluminum 2
12 185–409
LEG, left hand 2
13 185–410
LEG, right hand 2
14 108–391 BOLT
, M8 x 35 8
15 105–329 NUT
, M8 24
16 104–421 W
ASHER, M8 32
17 108–587*
O–RING, valve seat;
r (PTFE) 8
18 108–242 PLATE,
valve seat; 316 sst 4
19 108–240*
BALL; r (PTFE) 4
20 108–581
MANIFOLD, top (outlet);
aluminum 1
21 108–582
MANIFOLD, bottom (inlet);
aluminum 1
22 108–254 SCREW
, socket, M4 x 20 4
23 108–257 PLA
TE, slide valve 1
24 108–260 GASKET
, slide valve 1
25 108–261 VAL
VE, slide 1
CHECK V AL VE REP AIR KIT
(Must be purchased separately)
220–988 r (PTFE)
Consists of:
Ref. No. Qty
17
8
19 4
REF PART DESCRIPTION QTY
NO. NO.
26 108–262
SPRING, air valve 1
27 108–268
PIN, actuator , air valve 1
28 108–267
SPOOL, valve, pilot 1
29 154–771
O–RING; buna–N 2
30 108–256 CAP
, valve, right hand 1
31 108–263
SPOOL, air valve 1
32 108–264
BLOCK, air valve 1
33 108–255 CAP
, valve, left hand 1
35 108–253 SCREW
, M6 x 20 4
36 110–035 W
ASHER, M6 4
37 109–043 PLA
TE, air inlet 1
38 108–258 GASKET
, air inlet 1
39 108–265 SCREW
, socket, M6 x 35 3
40 108–274 MUFFLER 1
44 179–944**
LABEL, warning, suction 1
46 181–211**
LABEL, warning, HHC 1
47 181–212**
LABEL, warning, exhaust 1
48 104–582 W
ASHER, tab 1
49 104–029
LUG, grounding 1
51 108–251 BUSHING 2
52 108–766
AIR DIRECT OR V AL VE ASSY
Includes items 22–33 1
53 108–847*
DIAPHRAGM, backup 2
55 110–036 BOLT
, M8 x 45 8
* Included in repair kits. See below .
** Additional
warning labels and tags are available at no
extra charge.
DIAPHRAGM REP AIR KIT
(Must be purchased separately)
220–985 r (PTFE)
Consists of:
Ref. No. Qty
7 2
53 2
PTFE
PTFE
PTFE
PTFE
PTFE
PTFE

18 
PARTS LIST (Stainless Steel Models)
Model 220–545, Series B
With  (PTFE) Diaphragm
Includes items 1–55
12 11
1
4
51
2
15 16 40
20 47
14
17*
19*
18
17*
13
12
1516
8
6
45
39
16
15
30
38
37
35
36
21
14
16
17*
18
19*
17*
48,49
16
15
11
52
(Includes
items 22–33)
See Detail E
CHAMFERED
SIDE
FACES
BALL
TORQUE
T O
27 N.m
(20 ft–lb)
TORQUE TO
8.5–9.5 N.m
(6.2–7 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
6.8–7.9 N.m
(5–5.8 ft–lb)
TORQUE TO
42–47 N.m
(30–35 ft–lb)
TORQUE TO
13.5–16 N.m
(9.8–12 ft–lb)
TORQUE TO
27 N.m
(20 ft–lb)
TORQUE TO
27 N.m
(20 ft–lb)
7*
13
CHAMFERED
SIDE F ACES
BALL 33
51
53*
16
44
55
55
3
23 22
24
25
26
32
29
29
31
REF
27
28
27
TORQUE T O
3.4–4.5 N.m
(2.5–3.3 in–lb)
DETAIL E
HOW T O ORDER P ARTS
1 To be sure you receive the correct replacement parts, kits or
accessories, always give all of the information requested in the
chart
below .
2. Check the parts list to identify the correct part number; do not use
the ref. no. when ordering.
3. Order all parts from your nearest Graco distributor .
6 digit
Part Number Qty Part Description
PTFE

19
PARTS LIST (Stainless Steel Models)
Model 220–545, Series B
With r (PTFE) Diaphragm
Includes items 1–55
REF PART DESCRIPTION QTY
NO. NO.
1 108–248 SHAFT
, diaphragm 1
2 108–252
HOUSING, pump
(includes item 51) 1
3 108–574 BOLT
, M8 x 40 8
4 108–250
SEAL, shaft 2
5 108–249 STOP
, diaphragm 2
6 110–032 PLA
TE, support, air side 2
7 108–576*
DIAPHRAGM, r (PTFE) 2
8 110–279 PLA
TE, support, fluid side;
316 sst 2
11 108–580
COVER, diaphragm; 316 sst 2
12 185–409
LEG, left hand 2
13 185–410
LEG, right hand 2
14 108–391 BOLT
, M8 x 35 8
15 105–329 NUT
, M8 24
16 104–421 W
ASHER, M8 32
17 108–587*
O–RING, valve seat;
r (PTFE) 8
18 108–242 PLATE,
valve seat; 316 sst 4
19 108–240*
BALL; r (PTFE) 4
20 108–583
MANIFOLD, top (outlet);
316 sst 1
21 108–584
MANIFOLD, bottom (inlet);
316 sst 1
22 108–254 SCREW
, socket, M4 x 20 4
23 108–257 PLA
TE, slide valve 1
24 108–260 GASKET
, slide valve 1
25 108–261 VAL
VE, slide 1
CHECK V AL VE REP AIR KIT
(Must be purchased separately)
220–988 r (PTFE)
Consists of:
Ref. No. Qty
17
8
19 4
REF PART DESCRIPTION QTY
NO. NO.
26 108–262
SPRING, air valve 1
27 108–268
PIN, actuator , air valve 1
28 108–267
SPOOL, valve, pilot 1
29 154–771
O–RING; buna–N 2
30 108–256 CAP
, valve, right hand 1
31 108–263
SPOOL, valve 1
32 108–264
BLOCK, valve 1
33 108–255 CAP
, valve, left hand 1
35 108–253 SCREW
, M6 x 20 4
36 110–035 W
ASHER, M6 4
37 109–043 PLA
TE, air inlet 1
38 108–258 GASKET
, air inlet 1
39 108–265 SCREW
, socket, M6 x 35 3
40 108–274 MUFFLER 1
44 179–944**
LABEL, warning, suction 1
47 181–212**
LABEL, warning, exhaust 1
48 104–582 W
ASHER, tab 1
49 104–029
LUG, grounding 1
51 108–251 BUSHING 2
52 108–766
AIR DIRECT OR V AL VE ASSY
Includes items 22–33 1
53 108–847*
DIAPHRAGM, backup 2
55 110–036 BOLT
, M8 x 45 8
* Included in repair kits. See below .
** Additional
warning labels and tags are available at no
extra charge.
DIAPHRAGM REP AIR KIT
(Must be purchased separately)
220–985 r (PTFE)
Consists of:
Ref. No. Qty
7 2
53 2
PTFE
PTFE
PTFE
PTFE
PTFE
PTFE

20 
ACCESSORIES
USE GENUINE GRACO PARTS AND ACCESSORIES
Must be purchased separately .
GROUNDING CLAMP 103–538
GROUND WIRE 208–950
25 ft (7.6 m) long, 12 gauge (1.5 mm @)
AIR LINE FIL TER 106–148
17.5 bar (250 psi) MAXIMUM WORKING PRESSURE
Reusable 40 micron filter and drain cock.
3/8 npt(f) inlet and outlet
AIR LINE LUBRICA T OR 214–847
17.5 bar (250 psi) MAXIMUM WORKING PRESSURE
For automatic air valve lubrication.
3/8 npt(f) inlet and outlet
AIR REGULA T OR 202–156
21 bar (300 psi) MAXIMUM WORKING PRESSURE
0–14 bar (0–200 psi) air operating range.
3/8 npt (m x f) inlet and outlet
AIR CONTROL V AL VE 205–090
Use to control pump speed by regulating air flow . Install at
pump air inlet, using 156–823 Adapter . 1/4 npsm(m) x 1/4
npsm(f) swivel.
AIR INLET ADAPTER 156–823
Install at pump air inlet to allow use of 205–090 Air Con -
trol
V alve. 1/4 npt(m) x 1/4 npsm(f) swivel.
BLEED–TYPE MASTER AIR V AL VE 107–142
21 bar (300 psi) MAXIMUM WORKING PRESSURE
Relieves air trapped in the air line between the pump air
inlet and this valve when closed.
1/2 npt (m x f) inlet and outlet
STAINLESS S TEE L B AL L C ONVERSIO N K I T 2 20–987
The stainless steel balls in this kit are heavier than the
standard balls supplied in the pump, and will seat posi-
tively
when you are pumping high density or high viscos -
ity
fluids.
CONVERSION KIT 222–373
To convert buna–N, polyester elastomer , or EPDM
pumps
to a diaphragm model.
DUAL INLET CONVERSION KIT 220–986
For aluminum model pump 218–940. Converts pump to
enable intake of two dif ferent fluids, to be mixed in a 1:1
proportion. See page 5 for further information.
ADAPTERS
For plumbing the exhaust air .
108–271
3/8 BSP(m) x 1/4 npt(f)
108–272 3/8 BSP(f) x 1/4 npt(f)
GROUNDED BUNA–N AIR EXHAUST HOSE
12 bar (175 psi) MAXIMUM WORKING PRESSURE
For exhausting air .
3/8 npt (mbe), 13 mm (1/2 in.) ID
214–650 1.52 m (5 ft) long
214–651 5.48 m (18 ft) long
214–655 7.62 m (25 ft) long
214–654 15.2 m (50 ft) long
214–653 30.5 m (100 ft) long
FLUID PRESSURE RELIEF KIT 800–310
For use in systems with pressure rise due to thermal ex -
pansion.
Pump outlet manifold must be reversed so inlet
and outlet face the same direction.
PUMP OUTLET
803–102
RELIEF
VALVE
803–101 TEE
202–812 HOSE
(NEOPRENE)
156–823 SWIVEL
803–101 TEE
PUMP INLET
PTFE
PTFE