ARO PF20R-X-B Operator's Manual - Page 6
Browse online or download pdf Operator's Manual for Water Pump ARO PF20R-X-B. ARO PF20R-X-B 8 pages. 2” diaphragm pump, 1:1 ratio flap valve (metallic)
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Indicates parts included in 637369 Air Section Service Kit shown below and items (70), (144), (175), (180) shown on page 4.
n
Item
Description
(size)
101 Center Body
103 Bushing
105 Screw
(M6 x 1 - 6g x 180 mm)
107 End Plate
111 Spool
118 Actuator Pin
(0.250" x 2.276" long)
121 Sleeve
127 90_ St. Elbow
(1-1/2 - 11-1/2 N.P.T.)
~
n 132 Gasket
133 Washer
(M6)
134 Screw
(M6 x 1 - 6g x 35 mm)
135 Valve Block
136 End Cap
n 137 "O" Ring
(1/16" x 2" o.d.)
n 138 "U" Cup
(3/16" x 1.792" o.d.)
n 139 "U" Cup
(3/16" x 1-1/4" o.d.)
140 Valve Insert
141 Valve Plate
n 166 Track Gasket
n 167 Pilot Piston
(includes 168 and 169)
168 "O" Ring
(3/32" x 5/8" o.d.)
169 "U" Cup
(1/8" x 7/8" o.d.)
K Fluid Section Service Kit parts, see page 4.
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.
S
Inspect and replace old parts with new parts as necessary. Look for
S
deep scratches on surfaces, and nicks or cuts in "O" rings.
Take precautions to prevent cutting "O" rings upon installation.
S
Lubricate "O" rings with Lubriplate FML-2 grease.
S
Do not over-tighten fasteners, refer to torque specification block on
S
view.
Re-torque fasteners following restart.
S
SERVICE TOOLS -- To aid in the installation of (168) "O" rings onto
S
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 the lip direction. Lu-
bricate and replace (167).
4. Reassemble remaining parts, replace (173 and 174) "O" rings.
V "Smart Parts" Keep these items on hand in addition to the service kits for fast repair and reduction of down time.
Page 6 of 8
PARTS LIST / PF20X-X-X-B AIR SECTION
AIR MOTOR PARTS
Qty Part No.
[Mtl]
(1)
95667
[P]
(1)
94092
[D]
(4)
95921
[SS]
(2)
95846
[SS]
(1)
95651
[D]
(2)
94083
[SS]
(2)
94084
[D]
(1)
94860
[C / I]
(1)
94099
[B]
(8)
95931
[SS]
(8)
95923
[SS]
(1)
95789
[P]
(1)
95790
[P]
(1)
Y325-32
[B]
(1)
95966
[B]
(1)
Y186-50
[B]
(1)
95650
[Ck]
(1)
95659
[Ck]
(1)
94026
[B]
(1)
67164
[D]
(2)
94433
[U]
(1)
Y240-9
[B]
Item
Description
(size)
170 Piston Sleeve
n 171 "O" Ring
(3/32" x 1-1/8" o.d.)
n 172 "O" Ring
(1/16" x 1-1/8" o.d.)
n 173 "O" Ring
(1/16" x 1-3/8" o.d.)
174 "O" Ring
(1/8" x 1/2" o.d.)
Kn
n 176 Diaphragm
(check valve)
n 199 Track Gasket
n 200 Gasket
201 Muffler
~
n 232 "O" Ring
(1/8" x 1/2" o.d.)
233 Adapter Plate
236 Nut
(M6 x 1 - 6g)
n 243 "O" Ring
(1/8" x 5/8" o.d.)
n 244 "O" Ring
(1/8" x 7/8" o.d.)
L n Lubriplate FML-2 Grease
Lubriplate Grease Packets (10)
Items not shown
~
MATERIAL CODE
[B] = Nitrile
[D] = Acetal
[Br] = Brass
[I] =
Iron
[C] = Carbon Steel
[P] = Polypropylene
[Ck] = Ceramic
MAJOR VALVE DISASSEMBLY
1. Remove (135) valve block and (233) adapter plate, exposing (132
and 166) gaskets, (232) "O" ring and (176) checks.
2. Remove (233) adapter plate, releasing (140) valve insert, (141)
valve plate, (199 and 200) gaskets and (232, 243 and 244) "O" rings.
3. Remove (136) end cap and (137) "O" ring, 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) "O" ring on (136) end cap and assemble end cap to
(135) valve block, securing with (107) end plates and (105) screws.
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 2 identification dots to-
ward (199 and 200) gaskets.
5. Assemble (232, 243 and 244) "O" rings, (199 and 200) gaskets and
(233) adapter plate to (135) valve block.
6. Assemble (132 and 166) gaskets, (176) checks and (232) "O" ring to
(101) body.
7. Assemble (135) valve block and components to (101) body, secur-
ing with (134) screws.
Qty Part No.
[Mtl]
(1)
94081
[Br]
(1)
Y325-119
[B]
(1)
Y325-22
[B]
(2)
Y325-26
[B]
(2)
Y325-202
[B]
(2)
94102
[SP]
(1)
95666
[B]
(1)
95665
[B]
(1)
94810
(2)
Y325-202
[B]
(1)
95761
[P]
(4)
95924
[SS]
(1)
Y325-204
[B]
(1)
Y325-208
[B]
(1)
94276
637308
[SP] = Santoprene
[SS] = Stainless Steel
[U] = Polyurethane
PF20R-X-B
(en)