Product Manual

Page 8 of 12 66615X-X-C (en)

“Smart Parts” Keep these items on hand in addition to the Service Kits for fast repair and reduction of down time.
PARTS LIST / 66615X-X-C AIR SECTION
Item Description
(size)
Qty Part No. [Mtl]
101
Motor Body
(66615X-X, 66617X-X)
(1) 94744 [A]
(66616X-X, 66618X-X)
(1) 94742 [CI]

102
‘‘O” Ring
(1/16” x 1-1/4” OD)
(2) Y325-24 [B]

103 Sleeve (1) 94528 [D]

104
Retaining Ring, TruArc
(1-5/32” ID)
(2) Y145-26 [C]
105
Screw / Lockwasher
(1/4” - 20 x 5/8”)
(models 6661X0-X, 6661X1-X, 6661X2-X)
(8) 93860 [C]
6661XA-X, 6661XB-X, 6661XC-X)
(8) Y6-42-T [SS]
106
Lockwasher
(1/4”) (models 6661XA-X,
6661XB-X, 6661XC-X only)
(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
(models 66615X-X, 66617X-X)
(1) 92005 [A]
(models 66616X-X, 66618X-X)
(1) 93047 [C]

112 Washer
(1.557” OD)
(5) 92877 [Z]

113
“O” Ring
(small) (1/8” x 1-1/4” OD)
(5) Y325-214 [B]

114
“O” Ring
(large) (3/32” x 1-9/16” OD)
(6) Y325-126 [B]
Item Description
(size)
Qty Part No. [Mtl]

115 Spacer (4) 92876 [Z]

116
Spacer (1) 92006 [Z]

117
Gasket (1) 92004 [B/Ny]
118
Pilot Rod (1) 93309-2 [C]

119
“O” Ring
(1/8” x 3/4” OD)
(4) 93075 [U]
120
Spacer (3) 115959 [Z]
121
Sleeve Bushing (2) 98723-2 [Bz]

122
“O” Ring
(3/32” x 9/16” OD)
(2) 94820 [U]

123
Screw
(#8 - 32 x 3/8”)
(4) Y154-41 [C]
126
Pipe Plug
(1/2 - 14 PTF x 17/32”)
(1) Y227-5-L [C]
127 90º Street Elbow
(3/4 - 14 NPTF)
(1) Y43-5-C [C]
128 Pipe Plug
(1/8 - 27 PTF 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) 350-568
231
Pipe Plug
(1/4 - 18 NPTF x 0.41”) (models
66616X-X and 66618X-X only)
(2) Y17-51-S [SS]

Key-Lube “O” Ring Lubricant (1) 93706-1
10 Pack of Key-Lube 637175
AIR MOTOR SECTION SERVICE
Service is divided into two parts - 1. Pilot Valve, 2. Major Valve.
GENERAL REASSEMBLY NOTES:
y Air Motor Section Service is continued from Fluid Section
repair.
y Inspect and replace old parts with new parts as
necessary. Look for deep scratches on metallic surfaces,
and nicks or cuts in “O” rings.
y Take precautions to prevent cutting “O” rings upon
installation.
y Lubricate “O” rings with Key-Lube.
y Do not over-tighten fasteners, refer to torque specica-
tion block on view.
y Make sure to torque all 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 re-
install (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
retain 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 [SS] = Stainless Steel
[B] = Nitrile [D] = Acetal [U]= Polyurethane
[Bz] = Bronze [Ny] = Nylon [Z] = Zinc
[C] = Carbon Steel
MAJOR VALVE DISASSEMBLY
1. Remove (107) plate (or leg depending on model), (108
and 117) gaskets.
2. On the side opposite the air inlet, push on the inner di-
ameter of (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).
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).

Indicates parts included in 637118-C Air Section Service Kit.
SERVICE KIT NOTE: Service Kit 637118-C is a general repair kit for all 1” and larger ARO diaphragm pump air motors. It contains extra “O” Rings and other
parts that may not be needed to service this model.
RELEASED 13/Nov/2018 12:24:00 GMT