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PW10A-XXX-XXX-A (en)
PARTS LIST / PW10A-XXX-XXX-AXX AIR MOTOR SECTION
Indicates parts included in 637397 Air Section Service Kit shown below and items (70), (144), (175) and (180) shown on page 4.
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 neces-
sary. Look for deep scratches on metallic surfaces, and
nicks or cuts in “O” rings.
y
Take precautions to prevent cutting “O” rings upon instal-
lation.
y
Lubricate “O” rings with Lubriplate FML-2 grease.
y
Do not over-tighten fasteners, refer to torque specifica-
tion block on view.
y
Torque fasteners following re-start.
y
SERVICE TOOLS - To aid in the installation of (168) “O”
rings onto the (167) pilot piston, use tool #204130-T,
available from ARO.
PILOT VALVE DISASSEMBLY
1. A light tap on (118) should expose the opposite (121)
sleeve, (167) pilot piston and other parts.
2. Remove (170) sleeve. Inspect inner bore of sleeve for
damage.
PILOT VALVE REASSEMBLY
1. Clean and lubricate parts not being replaced from service
kit.
2. Install new (171 and 172) “O” rings. Replace (170) sleeve.
3. Install new (168) “O” rings and (169) seal -
NOTE:
Lip di-
rection. Lubricate and replace (167) pilot piston.
4. Reassemble remaining parts. Replace (173 and 174) “O”
rings.
MAJOR VALVE DISASSEMBLY
1. Remove (135) valve block and (233) adapter plate, expos-
ing (166 and 132) gaskets and (176) checks.
2. Insert a small flat blade screw driver into the notch in the
side of (135) valve block and push in on tab to remove
(233) adapter plate, releasing (140) valve insert, (141)
valve plate, (200) gasket.
3. Remove (136) end cap and (137) gasket, releasing (111)
spool.
MAJOR VALVE REASSEMBLY
1. Install new (138 and 139) “U” cups on (111) spool -
LIPS
MUST FACE EACH OTHER
.
2. Insert (111) spool into (135) valve block.
3. Install (137) gasket on (136) end cap and assemble end
cap to (135) valve block, securing with (105) screws.
NOTE:
Tighten (105) screws to 35 - 40 in. lbs (4.0 - 4.5 Nm).
4. Install (140) valve insert and (141) valve plate into (135)
valve block.
NOTE:
Assemble (140) valve insert with
“dished” side toward (141) valve plate. Assemble (141)
valve plate with part number identification toward (140)
valve insert.
5. Assemble (200) gasket and (233) adapter plate to (135)
valve block.
NOTE:
Assemble (233) adapter plate with
notched side down.
6. Assemble (132 and 166) gaskets and (176) checks to (101)
center body.
7. Assemble (135) valve block and components to (101)
body, securing with (134) screws.
NOTE:
Tighten (134)
screws to 40 - 50 in. lbs (4.5 - 5.6 Nm).
AIR MOTOR PARTS LIST
Item Description
(size)
(Qty) Part No.
[Mtl]
Item Description
(size)
(Qty) Part No.
[Mtl]
101 Center Body
(1) 97025
[A]
103 Bushing
(1) 97391
[D]
105 Screw
(M6 x 1 - 6g x 16 mm long)
(4) 95991
[SS]
111 Spool
(1) 95835
[D]
118 Actuator Pin
(2) 95999
[SS]
121 Sleeve
(2) 95123
[D]
128 Pipe Plug
(1/8 - 27 NPTF x 0.27”)
(1) Y17-50-S
[SS]
132 Gasket
(1) 96170
[B]
133 Washer
(1/4”)
(3) Y117-416-C [C]
134 Screw
(M6 x 1 - 6g x 20 mm)
(4) 95887
[SS]
135 Valve Block
(1) 95942-1
[Z]
136 End Cap
(1) 95941
[Z]
137 Gasket
(1) 95844
[B]
138 “U” Cup
(3/16” x 1-5/8” OD)
(1) Y186-53
[B]
139 “U” Cup
(3/16” x 1-1/8” OD)
(1) Y186-49
[B]
140 Valve Insert
(1) 95838
[AO]
141 Valve Plate
(1) 95837
[AO]
166 Gasket
(1) 96171
[B]
167 Pilot Piston
(includes 168 and 169)
(1) 67164
[D]
168 “O” Ring
(3/32” x 5/8” OD)
(2) 94433
[U]
169 “U” Cup
(1/8" x 7/8" OD)
(1) Y240-9
[B]
170 Piston Sleeve
(1) 94081
[D]
171 “O” Ring
(3/32” x 1-1/8” OD)
(1) Y325-119
[B]
172 “O” Ring
(1/16” x 1-1/8” OD)
(1) Y325-22
[B]
173 “O” Ring
(3/32” x 1-3/8” OD)
(2) Y325-123 [B]
174 “O” Ring
(1/8” x 1/2” OD)
(2) Y325-202
[B]
176 Diaphragm
(check valve)
(2) 95845
[U]
181 Roll Pin
(5/32”OD x 1/2”long)
(4) Y178-52-S [SS]
200 Gasket
(1) 96172
[B]
201 Muffler
(1) 350-568
- - -
233 Adapter Plate
(1) 95832
[P]
Lubriplate FML-2 Grease
(1) 94276
Lubriplate Grease Packets
(10) 637308
Items includedd in fluid section service kit, see page 4.
