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AIR MOT
OR SECTION SER
VICE
666DXX-X-
C
PAGE 6 OF 8
PARTS
LIST / AIR SECTION
n 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 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 (666D0X, D2X) (1) 98725-1 [A] V116 Spacer (666D0X, D2X) (1) 92006 [A]
Motor Body (666D1X, D3X) (1) 98719-1 [CI] Spacer (666D1X, D3X) (1) 93048 [SS]
V102 O-Ring (1 O.D.) (1) Y325-24 [B] n117 Gasket (1) 92004 [B/NY]
V103 Sleeve (1) 98718-1 [BZ] 118 Pilot Rod (1) 93309-2 [C]
n104 Retaining Ring, TruArc (.925 I.D.) (2) Y145-26 [C] n119 O-Ring (3/4 O.D.) (4) 93075 [U]
105 Screw/Washer (1/4-20 x 5/8) (8) 93860 [C] 120 Spacer (3) 115959 [Z]
106 Washer (Included With (105) -- ------- --- 121 Sleeve Bushing (2) 98723-2 [BZ]
107 Plate (2) 93707-1 [SS] n122 O-Ring (1/2 O.D.) (2) Y330-110 [B]
n108 Gasket (With Notch) (1) 92878 [B/NY] n123 Screw (8-32 x 3/8) (4) Y154-41 [C]
V109 Piston (1) 92011 [D] 126 Plug (1) Y227-5 [C]
n110 U-Cup (1-3/8 O.D.) (1) Y186-51 [B] 127 Elbow (1) Y43-5-C [C]
V111 Spool (666D0X, D2X) (1) 92005 [A] 128 Plug (1) Y17-50-C [C]
Spool (666D1X, D3X) (1) 93047 [C] 201 Muffler (1) 93139 [P]
V112 Washer (1.557 O.D.) (5) 92877 [Z] n Keylube, O-Ring Lubricant (1) 93706-1
n113 O-Ring (Small) (1-1/4 O.D.) (5) Y325-214 [B] 10 Pak of Keylube (Available) 637175
n114 O-Ring (Large) (1-9/16 O.D.) (6) Y325-126 [B] n
Service Kits include: Y212-101 (2) Screws(10-32 x 1/4)used on units mf'd
V115 Spacer (4) 92876 [Z]
() ( /)
between 8/90 and 4/92 to retain the pilot bushing.
Service is divided into two parts - 1.Pilot Valve, 2.Major Valve.
GENERALREASSEMBLY 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 Key-lube or equivalent.
S Do not over-tighten fasteners, refer to torque specification block
on view.
S Re-torque fasteners following restart.
PILOT
V
AL
VE DISASSEMBL
Y
1. Remove (104) retaining ring.
2. Remove (123) screws, (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"ring.
PILOT
V
AL
VE REASSEMBL
Y
1. Replace (102) ``O''ring 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.
n Parts Y145-26 (1.156 I.D) (Qty. 2) Retaining Rings are included in the
Service Kit for the repair of larger pumps.
MATERIAL CODE
[A] =Aluminum
[B] = Buna ~N"
[BZ]=Bronze
[C] = Carbon Steel
[CI] = Cast Iron
[D] = Acetal
[N] = Neoprene
[NY]=Nylon
[P] =Polypropylene
[U] = Polyurethane
[SS] = Stainless Steel
[Z] = Zinc
MAJOR
V
AL
VE REASSEMBL
Y
1. Remove (107) plate, (108) and (117) gaskets.
2. On the side opposite the air inlet, push on the inner diameter (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
V
AL
VE REASSEMBL
Y
1. Replace (112) washer, (114) ``O"ring, (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 outĆ
ward.
5. Install (108) gasket and replace (107).
V``Smart Parts" Keep these items on hand in addition to the Service Kits for fast repair and reduction of down time.