Ingersoll-Rand ARO 66607 A Series User manual

INCLUDING: OPERATION, INSTALLATION AND MAINTENANCE RELEASED: 2-14-20
REVISED: 6-12-20
(REV: C)
3/4" DIAPHRAGM PUMP
1:1 RATIO (METALLIC)
READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
It is the responsibility of the employer to place this information in the hands of the operator. Keep for future reference.
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET - BRYAN, OHIO 43506
[phone] FAX [phone] © 2020
arozone.com
OPERATOR’S MANUAL 66607X-X-A
66608X-X-A
SERVICE KITS
Refer to the Model Description Chart to match the pump
material options.
637118-C for air section repair (see page 6).
637119-XXX-C for uid section repair with seats (see page 4).
637119-XX-C for uid section repair without seats (see page 4).
637167 Abrasion Resistant Conversion Kit is available for use
in heavy and abrasive material applications (see page 4).
PUMP DATA
Models .............. See “Model Description Chart”for“-XXX”
Pump Type ........... Metallic Air Operated Double Diaphragm
Material ............. See“Model Description Chart”
Weight
Aluminum ....................... 17.5 lbs (7.94 kgs)
Maximum Air Inlet Pressure ........ 120 psig (8.3 bar)
Maximum Material Inlet Pressure... 10 psig (0.69 bar)
Maximum Outlet Pressure .......... 120 psig (8.3 bar)
Maximum Flow Rate (ooded inlet) 33 gpm (125 lpm)
Displacement / Cycle @ 100 psig
Standard Diaphragm............. 0.15 gal. (0.57 lit.)
Maximum Particle Size ............. 1/8" dia. (3.2 mm)
Maximum Temperature Limits (diaphragm / ball / seat material)
Acetal ..................... -20⁰ to 180⁰ F (-29⁰ to 82⁰ C)
E.P.R. / EPDM ............... -60⁰ to 280⁰ F (-51⁰ to 138⁰ C)
Hytrel®..................... -20⁰ to 180⁰ F (-29⁰ to 82⁰ C)
Neoprene.................. 0⁰ to 200⁰ F (-18⁰ to 93⁰ C)
Nitrile. . . . . . . . . . . . . . . . . . . . . . 10⁰ to 180⁰ F (-12⁰ to 82⁰ C)
Polypropylene ............. 32⁰ to 175⁰ F (0⁰ to 79⁰ C)
Polyurethane .............. -10⁰ to 150⁰ F (-23⁰ to 66⁰ C)
Kynar® PVDF ............... 10⁰ to 200⁰ F (-12⁰ to 93⁰ C)
Santoprene® ............... -40⁰to 225⁰F (-40⁰to 107⁰C)
PTFE ...................... 40⁰ to 225⁰ F (4⁰ to 107⁰ C)
Viton® ..................... -40⁰to 350⁰F (-40⁰to 177⁰C)
Dimensional Data............. See page 8
Noise Level @
70 psig, 60 cpm

............. 78.3 dB(A)

Tested with 93110 muer installed.
The pump sound pressure levels published here have been updated to an
Equivalent Continuous Sound Level (LAeq) to meet the intent of ANSI S1.13-1971,
CAGI- PNEUROP S5.1 using four microphone locations.
NOTICE: All possible options are shown in the chart. However, certain
combinations may not be recommended, consult a representative or the
factory if you have questions concerning availability.
3/4" DIAPHRAGM PUMP
6660XX-XXX-A
Figure 1
MODEL DESCRIPTION CHART
6660 X X X XX A
6660XX XXX A
C
637119 XX
DIAPHRAGMBALL
FLUID SECTION SERVICE KIT SELECTION
EXAMPLE:MODEL # 666070-1EB-A
Fluid Section Service Kit # 637119-EB-C
CENTER BODY MATERIAL
FLUID CAP / MANIFOLD MATERIAL
7 - Aluminum, NPTF
8 - Aluminum, BSP
SEAT MATERIAL
1 - Aluminum 4 - PVDF
2 - 316 Stainless Steel
3 - Polypropylene
BALL MATERIAL
8 - Hard 440 Stainless Steel
0 - Aluminum, Single
A - Aluminum, Single
(Steel Hardware)
1 - Neoprene
6 - Acetal
2 - Nitrile
8 - Polyurethane
3 - Viton
A - Stainless Steel
4 - PTFE
C - Hytrel
E - Santoprene
DIAPHRAGM MATERIAL
1 - Neoprene
2 - Nitrile
4 - PTFE / Santoprene
3 - Viton
9 - Hytrel
B - Santoprene
5 - Carbon Steel
(Stainless Steel Hardware)

Page 2 of 8 66607X-X-A (en)
EXCESSIVE AIR PRESSURE
STATIC SPARK
HAZARDOUS MATERIALS
HAZARDOUS PRESSURE
WARNING
EXCESSIVE AIR PRESSURE. Can cause
personal injury, pump damage or property damage.
yDo not exceed the maximum inlet air pressure as stated
on the pump model plate.
yBe sure material hoses and other components are
able to withstand fluid pressures developed by this
pump. Check all hoses for damage or wear. Be certain
dispensing device is clean and in proper working
condition.
WARNING
STATIC SPARK. Can cause explosion
resulting in severe injury or death. Ground pump and
pumping system.
ySparks can ignite ammable material and vapors.
yThe pumping system and object being sprayed
must be grounded when it is pumping, flushing,
recirculating or spraying flammable materials such
as paints, solvents, lacquers, etc. or used in a loca-
tion where surrounding atmosphere is conducive to
spontaneous combustion. Ground the dispensing
valve or device, containers, hoses and any object to
which material is being pumped.
yUse the pump grounding screw terminal provided.
Use ARO part no. 66885-1 ground kit or connect a
suitable ground wire (12 ga. minimum) to a good
earth ground source.
ySecure pump, connections and all contact points to
avoid vibration and generation of contact or static spark.
yConsult local building codes and electrical codes for
specic grounding requirements.
yAfter grounding, periodically verify continuity of
electrical path to ground. Test with an ohmmeter
from each component (e.g., hoses, pump, clamps,
container, spray gun, etc.) to ground to ensure
continuity. Ohmmeter should show 0.1 ohms or less.
ySubmerse the outlet hose end, dispensing valve or
device in the material being dispensed if possible.
(Avoid free streaming of material being dispensed.)
yUse hoses incorporating a static wire.
yUse proper ventilation.
yKeep inammables away from heat, open ames and
sparks.
yKeep containers closed when not in use.
WARNING
Pump exhaust may contain contaminants.
Can cause severe injury. Pipe exhaust away from work
are and personnel.
yIn the event of a diaphragm rupture, material can be
forced out of the air exhaust muer.
yPipe the exhaust to a safe remote location when
pumping hazardous or inammable materials.
yUse a grounded 3/8" minimum ID hose between the
pump and the muer.
WARNING
HAZARDOUS PRESSURE. Can result in
serious injury or property damage. Do not service
or clean pump, hoses or dispensing valve while the
system is pressurized.
yDisconnect air supply line and relieve pressure from
the system by opening dispensing valve or device
and / or carefully and slowly loosening and removing
outlet hose or piping from pump.
WARNING
HAZARDOUS MATERIALS. Can cause
serious injury or property damage. Do not attempt
to return a pump to the factory or service center that
contains hazardous material. Safe handling practices
must comply with local and national laws and safety
code requirements.
yObtain Material Safety Data Sheets on all materials
from the supplier for proper handling instructions.
WARNING
EXPLOSION HAZARD. Models containing
aluminum wetted parts cannot be used with 1,1,1-
trichloroethane, methylene chloride or other
halogenated hydrocarbon solvents which may react
and explode.
yCheck pump motor section, uid caps, manifolds and
all wetted parts to assure compatibility before using
with solvents of this type.
CAUTION
Verify the chemical compatibility of the
pump wetted parts and the substance being pumped,
flushed or recirculated. Chemical compatibility may
change with temperature and concentration of the
chemical(s) within the substances being pumped,
ushed or circulated. For specic uid compatibility,
consult the chemical manufacturer.
CAUTION
Maximum temperatures are based
on mechanical stress only. Certain chemicals will
significantly reduce maximum safe operating
temperature. Consult the chemical manufacturer for
chemical compatibility and temperature limits. Refer
to PUMP DATA on page 1 of this manual.
CAUTION
Be certain all operators of this equipment
have been trained for safe working practices,
understand it’s limitations, and wear safety goggles /
equipment when required.
CAUTION
Do not use the pump for the structural
support of the piping system. Be certain the system
components are properly supported to prevent stress
on the pump parts.
ySuction and discharge connections should be exible
connections (such as hose), not rigid piped, and should
be compatible with the substance being pumped.
CAUTION
Prevent unnecessary damage to the
pump. Do not allow pump to operate when out of
material for long periods of time.
yDisconnect air line from pump when system sits idle
for long periods of time.
CAUTION
Use only genuine ARO replacement parts
to assure compatible pressure rating and longest
service life.
NOTICE
Replacement warning labels are
available upon request: “Static Spark” (93616-1) and
“Diaphragm Rupture” (93122).
WARNING
= Hazards or unsafe practices which
could result in severe personal injury,
death or substantial property damage.
CAUTION
=Hazards or unsafe practices which
could result in minor personal
injury, product or property damage.
NOTICE
=Important installation, operation or
maintenance information.
OPERATING AND SAFETY PRECAUTIONS
READ, UNDERSTAND, AND FOLLOW THIS INFORMATION TO AVOID INJURY AND PROPERTY DAMAGE.

66607X-X-A (en) Page 3 of 8
GENERAL DESCRIPTION
The ARO diaphragm pump offers high volume delivery
even at low air pressure and a broad range of material
compatibility options available. Refer to the model and
option chart. ARO pumps feature stall resistant design,
modular air motor / fluid sections. Air operated double
diaphragm pumps utilize a pressure differential in the air
chambers to alternately create suction and positive uid pres-
sure in the uid chambers, valve checks ensure a positive ow
of uid. Pump cycling will begin as air pressure is applied and
it will continue to pump and keep up with the demand. It will
build and maintain line pressure and will stop cycling once
maximum line pressure is reached (dispensing device closed)
and will resume pumping as needed.
AIR AND LUBE REQUIREMENTS
WARNING
EXCESSIVE AIR PRESSURE. Can cause
personal injury, pump damage or property damage.
yA filter capable of filtering out particles larger than 50
microns should be used on the air supply. There is no
lubrication required other than the “O” ring lubricant which is
applied during assembly or repair.
yIf lubricated air is present, make sure that it is compatible
with the “O” rings and seals in the air motor section of the
pump.
OPERATING INSTRUCTIONS
yAlways flush the pump with a solvent compatible with
the material being pumped if the material being pumped
is subject to “setting up” when not in use for a period of
time.
yDisconnect the air supply from the pump if it is to be
inactive for a few hours.
yThe outlet material volume is governed not only by the
air supply, but also by the material supply available at the
inlet. The material supply tubing should not be too small
or restrictive. Be sure not to use hose which might co
lapse.
yWhen the diaphragm pump is used in a forced-feed
(ooded inlet) situation, it is recommended that a “Check
Valve”be installed at the air inlet.
ySecure the diaphragm pump legs to a suitable surface to
ensure against damage by vibration.
MAINTENANCE
Refer to the part views and descriptions as provided on pages
4 through 7 for parts identication and service kit information.
yCertain ARO “Smart Parts” are indicated which should be
available for fast repair and reduction of down time.
yService kits are divided to service two separate diaphragm
pump functions: 1. AIR SECTION, 2. FLUID SECTION. The
FLUID SECTION is divided further to match typical part
MATERIAL OPTIONS.
yProvide a clean work surface to protect sensitive internal
moving parts from contamination from dirt and foreign
matter during service disassembly and reassembly.
yKeep good records of service activity and include pump
in preventive maintenance program.
yBefore disassembling, empty captured material in the
outlet manifold by turning the pump upside down to
drain material from the pump.
FLUID SECTION DISASSEMBLY
1. Remove top manifold(s).
2. Remove (22) balls, (19) “O”rings and (21) seats.
3. Remove (15) uid caps.
NOTE: Only PTFE diaphragm models use a primary dia-
phragm (7) and a backup diaphragm (8). Refer to the auxiliary
view in the Fluid Section Illustration.
FLUID SECTION REASSEMBLY
yReassemble in reverse order.
yClean and inspect all parts. Replace worn or damaged
parts with new parts as required.
yLubricate (1) diaphragm rod and (2)“O” ring with
Key-Lube“O” ring lube.
yInstall (2) “O”ring on (1) diaphragm rod.
yBe certain (7) or (7 / 8) diaphragm(s) align properly with
(15) uid caps before making nal torque adjustments on
bolt and nuts to avoid twisting the diaphragm.
yFor models with PTFE diaphragms: Item (8) Santoprene
diaphragm is installed with the side marked “AIR SIDE”
towards the pump center body. Install the PTFE
diaphragm with the side marked“FLUID SIDE”towards the
uid cap.
yRe-check torque settings after pump has been re-started
and run a while.
Viton®and Hytrel®are registered trademarks of the DuPont®Company. Kynar®is a registered trademark of Penwell Corp
Santoprene®is a registered trademark of Monsanto Company, licensed to Advanced Elastomer Systems, L.P. Key-Lube®is a registered trademark of Key Industries

Page 4 of 8 66607X-X-A (en)
SEAT OPTIONS
6660XX-XXX-A
BALL OPTIONS
6660XX-XXX-A

“21”

“22” (1-" dia.) (Service Kit - XX)
-XXX Seat Qty [Mtl] -XXX Ball Qty [Mtl] -XXX Ball Qty [Mtl]
-1XX 92008-1 (4) [A] -X1X 90532-1 (4) [N] -XAX 90948 (4) [SS]
-2XX 90428-1 (4) [SS] -X2X 90532-2 (4) [B] -XCX 90532-C (4) [H]
-3XX 92926 (4) [P] -X3X 90532-3 (4) [V] -XEX 90532-A (4) [Sp]
-4XX 92941 (4) [K] -X4X 90532-4 (4) [T]
-5XX 95675-1 (4) [C] -X6X 90532-6 (4) [D]
-8XX 93367-1 (4) [SH] -X8X 90532-8 (4) [U]
HARDWARE OPTIONS 6660XX-XXX-A
Carbon Steel
6660X0
Stainless Steel
6660XA
Item Description (size) Qty Part No. [Mtl] Part No. [Mtl]
26 Bolt (5/16" -18 x1") (8) Y6-55-C [C] Y6-55-T [SS]
29 Nut (5/16" -18) (16) Y12-5-C [C] Y12-5-S [SS]
DIAPHRAGM OPTIONS 6660XX-XXX-A

For Service Kits
With Seats
-XXX = (Seat),
-XXX = (Ball)
-XXX = (Diaphragm)

For Service
Kits Without
Seats
-XX = (Ball),
-XX = (Diaphragm)

“7”

“8”

“3”

“19”
-XXXDiaphragm [Qty] [Mtl] Diaphragm [Qty] [Mtl]
“O” Ring
1/16" x 5/8" OD [Qty] [Mtl]
“O” Ring
3/32" x 1-9/16" OD
[Qty] [Mtl]
-XX1 637119-XX1-C 637119-X1-C 90533-1 (2) [N] ----- --- --- Y325-14 (4) [B] Y325-126 (4) [B]
-XX2 637119-XX2-C 637119-X2-C 90533-2 (2) [B] ----- --- --- Y325-14 (4) [B] Y325-126 (4) [B]
-XX3 637119-XX3-C 637119-X3-C 90533-3 (2) [V] ----- --- --- Y328-14 (4) [T] Y327-126 (4) [V]
-XX4 637119-XX4-C 637119-X4-C 93459-4 (2) [T] 92973-B (2) [SP] Y328-14 (4) [T] Y328-126 (4) [T]
-XX9 637119-XX9-C 637119-X9-C 90533-9 (2) [H] ----- --- --- Y328-14 (4) [T] Y327-126 (4) [V]
-XXB 637119-XXB-C 637119-XB-C 90533-B (2) [SP] ----- --- --- Y328-14 (4) [T] 90534 (4) [E]
MANIFOLD / FLUID CAP MATERIAL OPTIONS
6660XX-XXX-A
Aluminum
6660X0-X, 6660XA-X
NPTF BSP
Item Description (Size) Qty Part No. Part No. [Mtl]
15 Fluid Cap (2) 94945 94945 [A]
60 Inlet Manifold (1) 97843 97843-1 [A]
61 Outlet Manifold (1) 97844 97844-1 [A]
63 Pipe Plug (2) Y17-124 97921 [A]
PARTS LIST / 6660XX-X-A FLUID SECTION
MATERIAL CODE
[A] = Aluminum
[B] = Nitrile
[C] = Carbon Steel
[CI] = Cast Iron
[Co] = Copper
[D] = Acetal
[E] = E.P.R.
[H] = Hytrel
[K] = P.V.D.F. (Kynar)
[N] = Neoprene
[P] = Polypropylene
[SP] = Santoprene
[SH] = Hard Stainless Steel
[SS] = Stainless Steel
[T] = PTFE
[V] = Viton
637119
ABRASION RESISTANT
CONVERSION KIT INCLUDE
“21” Seat 93367-1 (4)
“22” Ball 90532-8 (4)
Fluid Section Service Kits (637119-XXX-C OR 637119-XX-C)
For Fluid Kits With Seats:
637119-XXX-C Fluid Section Service Kits include: Seats (see SEAT Option, refer to -XXX in chart below), Balls (see BALL Option, refer to -XXX in chart
below), Diaphragms (see DIAPHRAGM Option, refer to -XXX in chart below), plus“O”ring items (2), (3), and (19) listed below plus 93706-1 Key Lube grease
packet (see page 6).
For Fluid Kits Without Seats:

637119-XX-C Fluid Section Service Kits include: Balls (see BALL Option, refer to -XX in chart below), Diaphragms (see DIAPHRAGM Option, refer to -XX in
chart below), plus“O”ring items (2), (3), and (19) listed below plus 93706-1 Key Lube grease packet (see page 6).
Item Description (size in inches) Qty Part No. [Mtl]
1 Rod (1) 98724-1 [C]

2 ‘‘O” Ring (3/32" x 3/4" OD) (1) Y330-113 [B]
5 Washer - Air Side (3-5/8" OD) (2) 93441-2 [C]
6Washer - Fluid Side
*
(2) 93441-1 [SS]
models 6660X0 only (2) 93441-2 [C]
Item Description (size in inches) Qty Part No. [Mtl]
9 Washer (0.505" ID) * (2) 93189-1 [SS]
14 Screw (1/2 " 20 x 1") * (2) Y5-85-T [SS]
43 Ground Lug (see page 7) (1) 93004 [Co]
“Smart Parts”, keep these items on hand in addition to the service kits for fast repair and reduction of down time.
COMMON PARTS

66607X-X-A (en) Page 5 of 8
PARTS LIST / 6660XX-X-X-A FLUID SECTION
NOTE: Radius edge of parts (5 and 6) is against diaphragm.
TORQUE REQUIREMENTS 
NOTE: DO NOT OVERTIGHTENFASTENERS
(14) Bolt,25-30 ft lbs (33.9-40.7Nm).
(26) Boltsand (29) nuts,120 -140 in.lbs (13.6-15.8 Nm).
(105) 40 -50in. lbs(4.5- 5.6Nm).
LUBRICATION / SEALANTS
ApplyLoctite 271 to threads.
ApplyKey-Lubetoall “O” rings, “U” Cups&matingparts.
Apply anti-seize compound to threads and bolt and nut ange
heads which contact pump case when using stainless steel
fasteners.




COLOR CODE
DIAPHRAGM BALL
MATERIAL COLOR COLOR
Acetal N/A Orange
Nitrile Red (--) Red(•)
Hytrel CreamCream
NeopreneGreen (--) Green (• )
Santoprene CreamCream
PTFE White White
Urethane N/A Red
Viton Yellow(-- )Yellow(•)
(--) Stripe ( •)Dot
See item 8ininset below.
FOR THE
AIR MOTOR SECTION
SEE PAGES 6 AND 7
7
8
View for -X44 (PTFE diaphragm) conguration only.
AIR SIDE
SANTOPRENE
(GREEN when
used as backer)
FLUID SIDE
(WHITE)
Air
Side
Fluid
Side
Cross SectionViewofDiaphragms
1
8
6
42
3
7
5
Torque Sequence
Air
Side
Fluid
Side
PTFE
29

15
124
63 
26 
60
22
21
19 
5 
14 
9
6 7
3 
1
3
3 
3/4" Inlet
3/4 " Outlet
61
22
19
21
2
Figure 2

Page 6 of 8 66607X-X-A (en)
PARTS LIST / 6660XX-X-X-A AIR MOTOR SECTION
 Indicates parts included in 637118-C Air Section Service Kit.
SERVICE KIT NOTE: Service Kit 637118-C is a general repair kit for all 3/4" and larger ARO diaphragm pump air motors. It contains extra“O”Rings and
other parts that may not be needed to service this model.
AIR MOTOR PARTS LIST
Item Description (size) Qty Part No. [Mtl]
101 Motor Body (1) 94743 [A]

102 “O” Ring (1/16" x 1" OD) (2) Y325-20 [B]
103 Sleeve (1) 94527 [D]

104 Retaining Ring, TruArc (0.925" ID) (2) Y145-25 [C]
105 Screw/Washer (1/4"-20 x 5/8") (6660X0) (8) 93860 [C]
Cap Screw (1/4"-20 x 5/8") (6660XA) (8) Y6-42-T [SS]
106 Lockwasher (1/4") (6660XA) (8) Y14-416-T [SS]
107 Plate (2) 93707-1 [SS]

108 Gasket (with notch) (1) 92878 [B/Ny]
109 Piston (1) 92011 [D]

110 “U” Cup (3/16" x 1-3/8" OD) (1) Y186-51 [B]
111 Spool (1) 92005 [A]
112 Washer (1.557" OD) (5) 92877 [Z]

113 “O” Ring (1/8" x 1-1/4" OD) (5) Y325-214 [B]

114 “O” Ring (3/32" x 1-9/16" OD) (6) Y325-126 [B]
115 Spacer (4) 92876 [Z]
116 Spacer (1) 92006 [Z]

117 Gasket (1) 92004 [B/Ny]
AIR MOTOR PARTS LIST
Item Description (size) Qty Part No. [Mtl]
118 Pilot Rod (1) 93309-1 [C]

119 “O” Ring (1/8" x 3/4" OD) (4) 93075 [U]
120 Spacer (3) 115959 [Z]
121 Sleeve Bushing (2) 98723-1 [Bz]

122 “O” Ring (3/32" x 9/16" OD) (2) 94820 [U]

123 Screw (#8 - 32 x 3/8") (4) Y154-41 [C]
124 Stud (5/16" - 18 x 1-3/4") (6660X0) (16) 92866 [C]
(5/16" - 18 x 1-3/4") (6660XA) (16) 92866-1 [SS]
128 Pipe Plug (1/8 - 27 NPT x 1/4") (1) Y227-2-L [C]
195A Button Head Screw (1/4" - 20 x 1/4") (2) 94987 [SS]
195B Button Head Screw
(1/4" - 20 x 3/8")(1) 94987-1 [SS]
201 Muer (1) 93110 [C]

Key-Lube “O” Ring Lubricant (1) 93706-1
Pack of 10 Key-Lube 637175

Parts Y145-26 (1.156" ID) (qty 2) retaining rings and Y325-24 “O” rings (qty 2) are
included in the service Kit for the repair of larger pumps.
“Smart Parts” Keep these items on hand in addition to the Service Kits for fast
repair and reduction of down time.
AIR MOTOR SECTION SERVICE
Service is divided into two parts − 1. Pilot Valve, 2. Major
Valve. GENERAL REASSEMBLY NOTES:
yAir Motor Section Service is continued from Fluid Section
repair.
yInspect and replace old parts with new parts as necessary.
Look for deep scratches on metallic surfaces, and nicks or
cuts in“O”rings.
yTake precautions to prevent cutting “O” rings upon instal-
lation.
yLubricate“O”rings with Key-Lube grease.
yDo not over tighten fasteners, refer to torque specication
block on view.
yRe-torque fasteners following restart.
PILOT VALVE DISASSEMBLY
1. Remove (104) retaining ring.
2. Remove (123) screws and (122)“O”rings.
3. Remove (118) piston rod, (121) sleeve bushing, (119) “O”
rings and (120) spacers from the (101) motor body.
4. Remove (103) sleeve and (102) “O”rings.
PILOT VALVE REASSEMBLY
1. Replace two (102) “O” rings if worn or damaged and rein-
stall (103) sleeve.
2. Install one of the (121) sleeve bushings, (119) “O” rings,
(120) spacers and the remaining (121) bushing.
3. Carefully push (118) pilot rod into bushings etc. and re-
tain on each end with the two (122) “O” rings, retain with
(123) screws.
4. Replace (104) retaining rings.
MATERIAL CODE
[A] = Aluminum [CI] = Cast Iron [U] = Polyurethane
[B] = Nitrile [D] = Acetal [Z] = Zinc
[Bz] = Bronze [NY] = Nylon
[C] = Carbon Steel [SS] = Stainless Steel
MAJOR VALVE DISASSEMBLY
1. Remove (107) plate and (108 and 117) gaskets.
2. On the side opposite the air inlet, push on the inner di-
ameter (111) spool. This will force the (109) piston out.
Continue pushing the (111) spool and remove. Check for
scratches and gouges.
3. Reach into the air section (exhaust side) and remove (116)
spacer, (115) spacers, (113) “O” rings, (114) “O” rings, (112)
washers, etc. Check for damaged“O” rings.
MAJOR VALVE REASSEMBLY
1. Replace (112) washer, (114) “O” ring and (113) “O” ring
onto (115) spacer and insert etc.
NOTE: Be careful to orient spacer legs away from
blocking internal ports.
2. Lubricate and carefully insert (111) spool.
3. Install (117) gasket and (107) plate.
4. Lubricate and install (110) packing cup and insert (109)
piston into (air inlet side) cavity, the (110) packing cup
lips should point outward.
5. Install (108) gasket and (107) plate.

66607X-X-A (en) Page 7 of 8
PARTS LIST / 6660XX-X-X-A AIR MOTOR SECTION
201
195A 
128 
101
MAJOR VALVE CROSS SECTION DETAIL
109 110112 114113115 111 116
111
109
110 
ApplyLoctite 271 to threads.
ApplyLoctite 262 to threads.
ApplyLoctite 572 to threads.
Apply Key-Lube grease to all“O” rings,
“U” Cups andmatingparts.
LUBRICATION / SEALANTS




MAJOR VALVE
PILOT VALVE
103 
102 
104
120
119 
121
123 
Figure4
Figure 3
See cross section detail gure 4.
118 
43
195B 
122
117
108
107
106
105 
115
114 
113 
112
105 
IMPORTANT
BE CERTAIN TO ORIENT(115) SPACER LEGS
AWAY FROM BLOCKING INTERNAL PORTS
WHEN REASSEMBLING AIR SECTION.

Page 8 of 8 66607X-X-A (en)
PN 97999-1871
TROUBLESHOOTING
Product discharged from exhaust outlet.
yCheck for diaphragm rupture.
yCheck tightness of diaphragm nut.
Air bubbles in product discharge.
yCheck connections of suction plumbing.
yCheck“O”rings between intake manifold and uid caps.
yCheck tightness of diaphragm nut.
Low output volume, erratic ow, or no ow.
yCheck air supply.
yCheck for plugged outlet hose.
yCheck for kinked (restrictive) outlet material hose.
yCheck for kinked (restrictive) or collapsed inlet
material hose.
yCheck for pump cavitation − suction pipe should be sized
at least as large as the inlet thread diameter of the pump
for proper ow if high viscosity uids are being pumped.
Suction hose must be a non-collapsing type, capable of
pulling a high vacuum.
yCheck all joints on the inlet manifolds and suction con-
nections. These must be air tight.
yInspect the pump for solid objects lodged in the dia-
phragm chamber or the seat area.
DIMENSIONAL DATA- 6660XX-XXX-A
(Dimensions shown are for reference only, they are displayed in inches and millimeters (mm)).
4" (101.6 mm)
10" (254.4 mm)
5-3/4" (146.1 mm)
6-11/16"
(169.9 mm)
12-15/32"
(316.7 mm)
1-9/32"
(32.6 mm)
11-1/2" (292.1 mm)
MATERIAL INLET
3/4 - 14 NPTF - 1 OR
3/4 - 14 BSP
MATERIAL OUTLET
3/4 - 14 NPTF - 1 OR
3/4 - 14 BSP
AIR INLET
1/4 - 18 NPTF - 1
1-3/8"
(34.9 mm)
1/2" (12.7 mm)
7-11/32"
(186.7 mm)
6-3/32"
(155 mm)
8"
(203.2 mm)
13/32"
(10.3 mm)
11-19/32"
(294.4 mm)
Figure 5