66620XĆXĆC
Page 6 of 8
PARTS LIST / 66620X-X-C AIR SECTION
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Indicates parts included in 637118ĆC Air Section Service Kit.
SERVICE KIT NOTE: Service Kit 637118ĆC is a general repair kit for all 1" and larger ARO diaphragm pump air motors.
It contains extra O" Rings and extra parts that may not be needed to service this model.
Item
Description
(size in inches)
Qty
Part No.
[Mtl]
Item
Description
(size in inches)
Qty
Part No.
[Mtl]
101 Motor Body
(66620XĆX, 66622XĆX)
(1)
94744
[A]
(66621XĆX, 66623XĆX)
(1)
94742
[CI]
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102 O" Ring
(1/16" x 1Ć1/4" o.d.)
(2)
Y325Ć24
[B]
V
103 Sleeve
(1)
94528
[D]
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104 Retaining Ring, TruArc
(1Ć5/32" i.d.)
(2)
Y145Ć26
[C]
105 Cap Screw
(1/4" Ć 20 x 5/8")
(for 6662XAĆ, 6662XBĆ, 6662XCĆ)
(8)
Y6Ć42ĆT
[SS]
(for 6662X0Ć, 6662X1Ć, 6662X2Ć) w/lockwasher
(8)
93860
[C]
106 Lockwasher
(1/4")
(6662XA, 2XB, 2XC only)
(7)
Y14Ć416ĆT
[SS]
107 Plate
(2)
93707Ć1
[SS]
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108 Gasket
(with notch)
(1)
92878
[B/NY]
V
109 Piston
(1)
92011
[D]
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110 U" Cup
(3/16" x 1Ć3/8" o.d.)
(1)
Y186Ć51
[B]
V
111 Spool
(66620XĆX, 66622XĆX)
(1)
92005
[A]
(66621XĆX, 66623XĆX)
(1)
93047
[C]
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112 Washer
(1.557" o.d.)
(5)
92877
[Z]
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113 O" Ring
(small) (1/8" x 1Ć1/4" o.d.)
(5)
Y325Ć214
[B]
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114 O" Ring
(large) (3/32" x 1Ć9/16" o.d.)
(6)
Y325Ć126
[B]
V
115 Spacer
(4)
92876
[Z]
V
116 Spacer
(1)
92006
[Z]
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117 Gasket
(1)
92004
[B/NY]
118 Pilot Rod
(1)
93309Ć2
[C]
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119 O" Ring
(1/8" x 3/4" o.d.)
(4)
93075
[U]
120 Spacer
(3)
115959
[Z]
121 Sleeve Bushing
(2)
98723Ć2
[Bz]
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122 O" Ring
(3/32" x 9/16" o.d.)
(2)
94820
[U]
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123 Screw
(#8 Ć 32 x 3/8")
(4)
Y154Ć41
[C]
126 Pipe Plug
(1/2 Ć 14 P.T.F. x 17/32")
(1)
Y227Ć5ĆL
[C]
127 90
_
Street Elbow
(3/4 Ć 14 N.P.T.)
(1)
Y43Ć5ĆC
[C]
128 Pipe Plug
(1/8 Ć 27 P.T.F. x 1/4")
(1)
Y227Ć2ĆL
[C]
195 Button Head Screw
(1/4" Ć 20 x 1/4")
(3)
94987
[SS]
201 Muffler
(1)
93139
[P]
231 Pipe Plug
(66621XĆX and 66623XĆX only)
(2)
Y17Ć51ĆS
[SS]
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KeyĆLube O" Ring Lubricant
(1)
93706Ć1
10 Pak of KeyĆLube
(10) 637175
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Service Kits include: Y212Ć101 (2) Screws (#10 Ć 32 x 1/4") used on units mf'd beĆ
tween 8/90 and 4/92 to retain the pilot bushing.
AIR MOTOR SECTION SERVICE
Service is divided into two parts - 1. Pilot Valve, 2. Major Valve.
GENERAL REASSEMBLY NOTES:
S
Air Motor Section Service is continued from Fluid Section repair.
S
Inspect and replace old parts with new parts as necessary. Look for
deep scratches on metallic surfaces, and nicks or cuts in O" rings.
S
Take precautions to prevent cutting O" rings upon installation.
S
Lubricate O" rings with KeyĆLube.
S
Do not overĆtighten fasteners, refer to torque specification block on
view.
S
ReĆtorque 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 reinstall (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
[P] = Polypropylene
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 diameter 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 inĆ
ternal 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 replace (107).
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``Smart Parts" Keep these items on hand in addition to the service kits for fast repair and reduction of down time.
