ARO PD20 series, Operator'S Manual

Page: 8 / 12

Page 8 of 12 PX20X-XXX-XXX-BXXX (en)
PARTS LIST / PX20X-XXX-XXX-BXXX AIR MOTOR SECTION
NOTE: DO NOT OVERTIGHTEN FASTENERS.
LUBRICATION / SEALANTS
ASSEMBLY TORQUE REQUIREMENTS
Apply Lubriplate FML-2 grease to all “O” rings, “U” cups and
mating parts.
Apply Loctite 271 to threads.
A replacement Major Valve Service Assembly is available separately, which includes the following:
637374-2 for models PD20A-XXX-XXX-BXXX: 105 (4), 111, 128 (2), 132, 133 (3), 134 (4), 135, 136, 137,
138, 139, 140, 141, 166, 176 (2), 199, 200, 233, 240 (2), 241, 242, 243 and 244.
637374-3 for models PE20A-XXX-XXX-BXXX: 76, 105 (4), 111, 128 (2), 132, 133 (3), 134 (4), 135, 136, 137,
138, 139, 140, 141, 166, 176 (2), 199, 200, 233, 240 (2), 241, 242, 243 and 244.
637374-4 for models PD20S-XXX-XXX-BXXX: 105 (4), 111, 128 (2), 132, 133 (3), 134 (4), 135, 136, 137,
138, 139, 140, 141, 146, 147, 176 (2), 199, 200, 233, 240 (2), 241, 242, 243 and 244.
637374-5 for models PE20S-XXX-XXX-BXXX: 76, 105 (4), 111, 128 (2), 132, 133 (3), 134 (4), 135, 136, 137,
138, 139, 140, 141, 146, 147, 176 (2), 199, 200, 233, 240(2), 241, 242, 243 and 244.
(105) Screw, 40 - 50 in. Lbs (4.5 - 5.6 Nm).
(134) Screw, 40 - 50 in. Lbs (4.5 - 5.6 Nm).
(240) Screw, 40 - 50 in. Lbs (4.5 - 5.6 Nm).
Apply anti-seize compound to threads and bolt and nut flange
heads which contact pump case when using stainless steel fasteners.
Apply PTFE tape to threads.
200
135
133
138
137
242
134
128
136
111
43
139
105
PILOT VALVE
PILOT VALVE
MAJOR VALVE
201
127
174
121 118
173
101
103
174
121
118
167
170
173
171
172
169
168
132
240
128
199
141
140
241
176
166
233
243
244
Optional 94117 Muffler
Substitute these “O“ rings for
(166) gasket on models PX20S-
XXX-XXX-B( ).
147
146
76
(PE20A-XXX-XXX-BSXX)
(PE20S-XXX-XXX-BSXX)
Figure 3