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Page 6 of 8 670077 (en)
PARTS LIST / 670077 AIR MOTOR SECTION
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Indicates parts included in 637428 air section repair kit.
MATERIAL CODE
[B] = Nitrile [PPG] = Glass Filled Polypropylene
[Ck] = Ceramic [SS] = Stainless Steel
[D] = Acetal [U] = Polyurethane
DIAPHRAGM PUMP SERVICE
GENERAL SERVICE NOTES:
Inspect and replace old parts with new parts as neces-
sary. Look for deep scratches on metallic surfaces, and
nicks or cuts in “O” rings.
Tools needed to complete disassembly and repair:
7/8” socket or wrench, 1/2” socket or wrench, 3/8”
socket or wrench, 3/8” Allen wrench, T-10 Torx screw-
driver, torque wrench (measuring inch pounds), “O”
ring pick.
FLUID SECTION DISASSEMBLY
Remove (61) top manifold.
Remove (41) ball cages, (22) balls, (19 and 20) “O” rings
and (21) seats. NOTE: If cages are difficult to remove at
this step, it may be helpful to proceed through step 5 and
remove them once they are accessible from the inside of
the uid cap.
Remove (60) bottom manifold.
Remove (19) “O” rings, (21) seats and (22) balls.
Remove (15) uid caps.
Remove (6) diaphragm nut, (7) diaphragm and (5) washer
from (1) connecting rod.
Remove (1) connecting rod from air motor.
Carefully remove remaining (6) diaphragm nut, (7) dia-
phragm and (5) washer from (1) connecting rod. Do not
mar surface of connecting rod.
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FLUID SECTION REASSEMBLY
Reassemble in reverse order.
Lubricate (1) connecting rod with Lubriplate or equiva-
lent “O” ring lubricant.
Connecting rod (1) should be installed using 96571 bul-
let, included in service kit.
Install (5) washers with i.d. chamfer toward diaphragm.
AIR MOTOR SECTION SERVICE
Service is divided into two parts - 1. Pilot Valve, 2. Major
Valve.
Air Motor Section service is continued from Fluid Section
repair.
PILOT VALVE DISASSEMBLY
Remove (123) screws, releasing (103) covers, (121) wash-
ers, (118) actuator pins and (167) pilot piston.
Remove (170) spool bushing and inspect inner bore of
bushing for damage.
PILOT VALVE REASSEMBLY
Clean and lubricate parts not being replaced from service
kit.
Assemble (171) “O” rings to (170) bushing and assemble
bushing into (101) center body.
Lubricate and assemble (167) pilot piston assembly into
(170) bushing.
Assemble (173 and 174) “O” rings and (121) washers to
(103) covers, then insert (118) actuator pins through as-
sembly.
Assemble (144) “U” cups (note the lip direction) and (103)
covers to (101) center body, securing with (123) screws.
NOTE: Tighten (123) screws to 4 - 6 in. lbs (0.45 - 0.68 Nm).
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AIR MOTOR PARTS LIST
Item Description
(size)
Qty Part No. [Mtl]
101 Center Body (1) 96315 [PPG]
103R Cover
(right side)
(1) 96091 [D]
103L Cover
(left side)
(1) 96351 [D]
107 Plug, Small (1) 96353 [D]
111 Major Valve Spool (1) 95919 [D]
118 Actuator Pin (2) 97111 [SS]
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121 Washer (2) 96092 [D]
123 Screw
(#4 - 20 x 1/2”)
(8) 96093 [SS]
124 Stud
(5/16” - 18 x 1-17/32”) (see page 5)
(8) 93249 [SS]
129 Mu er Assembly (1) 67367 [PPG]
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132 Air Manifold Gasket (1) 96214-1 [B]
134 Flange Bolt
(1/4” - 20 x 5-3/4”)
(4) 94871 [SS]
135 Valve Block (1) 96204 [PPG]
136 Plug, Large (1) 96352 [D]
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137 “O” Ring
(1/16” x 1-5/8” o.d.)
(3) Y325-29 [B]
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138 “U” Cup Packing
(1/8” x 1” o.d.)
(1) 94395 [U]
Item Description
(size)
Qty Part No. [Mtl]
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139 “U” Cup Packing
(1/8” x 1-7/16” o.d.)
(1) 96383 [U]
140 Valve Insert (1) 93276 [Ck]
141 Valve Plate (1) 96173 [Ck]
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144 “U” Cup Packing
(3/16” x 1” o.d.)
(2) Y187-48 [B]
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166 “O” Ring
(1/16” x 1-1/4” o.d.)
(1) Y325-24 [B]
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167 Pilot Piston
(includes 168 and 169)
(1) 67382 [D]
168 “O” Ring
(1/16” x 7/16” o.d.)
(2) 96459 [U]
169 “U” Cup Packing
(1/8" x 5/8" o.d.)
(1) 96384 [U]
170 Spool Bushing (1) 96090 [D]
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171 “O” Ring
(1/16” x 13/16” o.d.)
(2) Y325-17 [B]
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173 “O” Ring
(3/32” x 7/8” o.d.)
(2) Y325-115 [B]
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174 “O” Ring
(3/32” x 11/32” o.d.)
(2) Y325-105 [B]
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200 Porting Gasket (1) 96364 [B]
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Lubriplate FML-2 Grease (1) 94276
Lubriplate Grease, 10 Pack 637308