Ingersoll-Rand ARO 637140-4B, Operator'S Manual, Page: 6 / 12

Page 6 of 12 670093 (en)

Indicates parts included in 637428 Air Section Repair Kit
.
Item Description (size) Qty Part No. [Mtl] Item Description (size) Qty Part No. [Mtl]
101 Center Body (1) 97006 [PPG]  167 Pilot Piston
(includes 168 and 169)
(1) 67382 [D]
103R Cover
(right side)
(1) 96091 [D] 168 “O” Ring
(1/16” x 7/16” OD)
(2) 96459 [U]
103L Cover
(left side)
(1) 96351 [D] 169 “U” Cup Packing
(1/8” x 5/8” OD)
(1) 96384 [U]
118 Actuator Pin (2) 94874-1 [SS] 170 Spool Bushing (1) 96090 [D]
121 Washer (2) 96092 [D]  171 “O” Ring
(1/16” x 13/16” OD)
(2) Y325-17 [B]
123 Screw
(#4 - 20 x 1/2”)
(8) 96093 [SS]  173 “O” Ring
(3/32” x 7/8” OD)
(2) Y325-115 [B]
126 Pipe Plug (2) 93832-3 [K]  174 “O” Ring
(3/32” x 11/32” OD)
(2) Y325-105 [B]
128 Plug
(#10 - 32 x 5/32”)
(1) 59632-1 [Ny]  200 Porting Gasket (1) 96364 [B]
129 Exhaust Cover
(for model 670093)
(1) 67443 [PPG] 232 “O” Ring
(1/16” x 3/8” OD)
(4) Y325-10 [B]
(for model 670109)
(1) 67367 [PPG] 233 Sensor
(for model 670093)
(1) 97175
130 Gasket
(for model 670093)
(1) 93107 [SY]
(for model 670109)
--- ---
(for model 670109)
--- --- ---

Lubriplate FML-2 grease (1) 94276
 132 Air Manifold Gasket (1) 96214-1 [B] Lubriplate Grease Packets (10) 637308
134 Flange Bolt
(1/4” - 20 x 4-1/4”)
(4) 96465 [SS]
135 Porting Plate (1) 96382 [PPG]
 144 “U” Cup Packing
(3/16” x 1” OD)
(2) Y187-48 [B]
PARTS LIST / 670093 and 670109 - AIR MOTOR SECTION
MATERIAL CODE
[B] = Nitrile [PPG] = Glass filled Polypropylene
[C] = Carbon Steel [SS] = Stainless Steel
[D] = Acetal [SY] = Syn Seal
[K] = Kynar PVDF [U] = Polyurethane
[Ny] = Nylon
DIAPHRAGM PUMP SERVICE
GENERAL SERVICE NOTES:
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
Tools needed to complete disassembly and repair:
y
7/8” socket or wrench, 1/2” socket or wrench, 3/8” sock-
et or wrench, 3/8” Allen wrench, T-10 Torx screwdriver,
torque wrench (measuring inch pounds), “O” ring pick.
FLUID SECTION DISASSEMBLY
1. Remove (34) top manifold / (36) swivel assembly.
2. Remove (19) “O” rings, (21) seats and (22) balls.
3. Remove (35) bottom manifolds / (36) swivel assembly.
4. Remove (19) “O” rings, (21) seats and (22) balls.
5. Remove (15) fluid caps.
6. Remove (6) diaphragm nut and (5) washer.
7. Remove (29) set screws.
8. Remove (1) connecting rod from air motor sliding off (2)
ring.
9. Carefully remove remaining (6) diaphragm nut and (5)
washer from (1) connecting rod. Do not mar surface of
connecting rod.
FLUID SECTION REASSEMBLY
y
Reassemble in reverse order.
y
Lubricate (1) connecting rod with Lubriplate or equivalent
“O” ring lubricant.
y
Connecting rod (1) should be installed using 96571 bullet,
included in service kit.
y
Install (5) washers with ID chamfer toward diaphragm.
y
When replacing PTFE diaphragms, install the 93465 San-
toprene diaphragm behind the PTFE diaphragm.
AIR MOTOR SECTION SERVICE
y
Air Motor Section service is continued from Fluid Section
repair.
AIR MOTOR SECTION DISASSEMBLY
1. Remove (123) screws, releasing (103) covers, (121) wash-
ers, (118) actuator pins and (167) pilot piston.
2. Remove (170) spool bushing and inspect inner bore of
bushing for damage.
3. Unthread (134) bolts, releasing (129) muffler assembly.
4. Pull (135) porting plate and (132 and 200) gaskets from
(101) center body.
AIR MOTOR SECTION REASSEMBLY
1. Clean and lubricate parts not being replaced from service
kit
2. Assemble (171) “0” rings to (170) bushing and assemble
bushing into (101) center body.
3. Lubricate and assemble (167) pilot piston assembly into
(170) bushing.
4. Assemble (173 and 174) “0” rings and (121) washers to
(103) covers, then insert (118) actuator pins through as-
sembly.
5. 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).
6. Assemble (1 32 and 200) gaskets, (135) porting plate and
(129) muffler assembly to (101) center body, securing
with (134) bolts. NOTE: Tighten (134) bolts to 15-20 in. lbs
(1.7-2.3 Nm).