Page 6 of 8
PD20E-X-X (en)
3
Indicates parts included in 637369 Air Section Service Kit shown below and items (70), (144), (175), (180), (237) and (238) shown on page 4
.
AIR MOTOR PARTS
Item
Description (size)
Qty
Part No.
[Mtl]
Item
Description (size)
Qty
Part No. [Mtl]
101 Center Body
(1)
95667-1
[GP]
168 “O” Ring
(3/32” x 5/8” o.d.)
(2)
94433
[U]
103 Bushing
(1)
94092
[D]
169 U” Cup (
1/8” x 7/8” o.d.)
(1)
Y240-9
[B]
105 Screw
(M6 x 1 - 6g x 180 mm)
(4)
95921
[SS]
170 Piston Sleeve
(1)
94081
[Br]
107 End Plate
(2)
95846
[SS]
3
171 “O” Ring
(3/32” x 1-1/8” o.d.)
(1)
Y325-119 [B]
111 Spool
(1)
95651
[D]
3
172 “O” Ring
(1/16” x 1-1/8” o.d.)
(1)
Y325-22
[B]
118 Actuator Pin
(0.250” x 2.276” long)
(2)
94083
[SS]
3
173 “O” Ring
(1/16” x 1-3/8” o.d.)
(2)
Y325-26
[B]
121 Sleeve
(2)
94084
[D]
3
174 “O” Ring
(1/8” x 1/2” o.d.)
(2)
Y325-202 [B]
127 90
0
St. Elbow
(1-1/2 - 11-1/2 N.P.T.)
(1)
94860
[C / I]
3
176 Diaphragm
(check valve)
(2)
94102
[SP]
3
132 Gasket
(1)
94099
[B]
3
199 Track Gasket
(1)
95666
[B]
133 Washer
(M6)
(7)
95931
[SS]
3
200 Gasket
(1)
95665
[B]
134 Screw
(M6 x 1 - 6g x 35 mm)
(8)
95923
[SS]
201 Muffl
er Kit
(includes item 127)
(1)
67213
135 Valve Block
(1)
95789-2
[GP]
3
232 “O” Ring
(1/8” x 1/2” o.d.)
(2)
Y325-202 [B]
136 End Cap
(1)
95790
[P]
233 Adapter Plate
(1)
95761
[P]
3
137 “O” Ring
(1/16” x 2” o.d.)
(1)
Y325-32
[B]
236 Nut
(M6 x 1 - 6g)
(4)
95924
[SS]
3
138 U” Cup
(3/16” x 1.792” o.d.)
(1)
95966
[B]
3
Lubriplate FML-2 Grease
(1)
94276
3
139 U” Cup
(3/16” x 1-1/4” o.d.)
(1)
Y186-50
[B]
Lubriplate Grease Packets (10)
637308
140 Valve Insert
(1)
95650
[Ck]
141 Valve Plate
(1)
95659
[Ck]
MATERIAL CODE
3
146 “O” Ring
(1/8” x 7/8” o.d.)
(1)
Y325-208
[B]
[B] = Nitrile
[Br] = Brass
[C] = Carbon Steel
[Ck] = Ceramic
[D] = Acetal
[GP] = Groundable Polypropylene
[I] = Iron
[P] = Polypropylene
[SP] = Santoprene
[SS] = Stainless Steel
[U] = Polyurethane
3
147 “O” Ring
(1/8” x 5/8” o.d.)
(1)
Y325-204
[B]
3
166 Track Gasket
(1)
94026
[B]
3
167 Pilot Piston
(includes 168 and 169)
(1)
67164
[D]
Indicates items included in Fluid Section Service Kit, see page 4.
PARTS LIST / PD20E-X-X AIR SECTION
AIR MOTOR SECTION SERVICE
Service is divided into two parts − 1. Pilot Valve,
2. Major Valve. GENERAL REASSEMBLY NOTES:
Air Motor Section Service is continued from Fluid Section repair.
Inspect and replace old parts with new parts as necessary. Look
for deep scratches on surfaces, and nicks or cuts in O” rings.
Take precautions to prevent cutting O” rings upon installation.
Lubricate O” rings with Lubriplate FML-2 grease.
Do not over-tighten fasteners, refer to torque specification
block on view.
Re-torque fasteners following restart.
SERVICE TOOLS − To aid in the installation of (168) O” rings onto
the (167) pilot piston, use tool # 204130-T, available from ARO.
y
y
y
y
y
y
y
PILOT VALVE DISASSEMBLY
A light tap on (118) should expose the opposite (121) sleeve,
(167) pilot piston and other parts.
Remove (170) sleeve, inspect inner bore of sleeve for damage.
1.
2.
PILOT VALVE REASSEMBLY
Clean and lubricate parts not being replaced from service kit.
Install new (171 and 172) O” rings, replace (170) sleeve.
Install new (168) O” rings and (169) seal - Note the lip direc-
tion. Lubricate and replace (167).
Reassemble remaining parts, replace (173 and 174) O” rings.
1.
2.
3.
4.
MAJOR VALVE DISASSEMBLY
Remove (135) valve block and (233) adapter plate,
exposing (132 and 166) gaskets, (232) O” ring and
(176) checks.
Remove (233) adapter plate, releasing (140) valve in-
sert, (141) valve plate, (199 and 200) gaskets and (146,
147 and 232) O” rings.
Remove (136) end cap and (137) O” ring, releasing (111)
spool.
1.
2.
3.
MAJOR VALVE REASSEMBLY
Install new (138 and 139) U” cups on (111) spool −
LIPS MUST FACE EACH OTHER.
Insert (111) spool into (135) valve block.
Install (137) O” ring on (136) end cap and assemble
end cap to (135) valve block, securing with (107)
end plates and (105) screws.
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 2 identification dots toward
(199 and 200) gaskets.
Assemble (146, 147 and 232) O” rings, (199 and 200)
gaskets and (233) adapter plate to (135) valve block.
Assemble (132 and 166) gaskets, (176) checks and
(232) O” ring to (101) body.
Assemble (135) valve block and components to
(101) body, securing with (134) screws.
1.
2.
3.
4.
5.
6.
7.
