Ingersoll-Rand ARO EVO EP20 Series, Operator'S Manual

Page: 32 / 44

Page 32 of 44 EP20-XXXXX-XXX-XXX (en)
PARTS LIST / CRANKCASE EP20-XXXXX-XXX-XXX
Item Description (size) Qty Part No. [Mtl]
101 Main Housing (1) [CI]
102 Housing Cap (1) [CI]

103 O-Ring
(1/8” x 7-3/4” OD)
(1) Y325-264 [B]
104 Screw
(M10 x 1.5 - 6g x 35 mm)
(6) Y256-104-E [C]
105 Leg (3) 97958 [C]
106 Screw
(M12 x 1.75 - 6g x 40 mm)
(12) Y255-123-E [C]
107 Bearing, Upper (1) [C]
108 Snap Ring
(55 mm OD)
(1) 97956 [C]
109 Shaft Seal, Upper (1) 98053 [B]
110 Shaft Sleeve, Upper (1) [SS]
111 Bearing, Lower (1) [C]

112 Shaft Seal, Lower (1) 97870 [B]
113 Shaft Sleeve, Lower (1) [SS]
114 Lower Cap (1) 97869 [C]
115 Screw
(M6 x 1 - 6g x 20 mm)
(3) Y256-63-E [C]

116 O-Ring
(1/8” x 1-3/4” OD)
(1) Y325-222 [B]

117 O-Ring
(1/8” x 3-3/4” OD)
(1) Y325-237 [B]
118 ASM, Crankshaft
(Spline)
(1) [C]
119 Bearing, Throw (3) [C]
120 Bearing, Spacer (3) [C]
121 Connecting Rod,
Bearing-Side
(3) [CI]
122 Roll Pin
(M3 x 8 mm)
(6) 25M13EA213 [C]
123 Cottor pin (1) 97859 [C]
124 Cam (1) [D]
125 Screw
(M6 x 1 - 6g x 20 mm)
(2) Y256-63-E [C]
126 Breathe
r (3/8” -18 NPT )
(1) 98178 [Ny]
127 Elbow
(3/8” - 18 NPT)
(1) 98218 [Ny]
130 Cylinder (3) 98182 [C]
131 Screw
(M12 x 1.75 - 6g x 40 mm)
(12) Y255-123-E [C]

132 O-Ring
(1/8” x 5” OD)
(3) Y325-248 [B]
133 Wear Sleeve (3) 98183 [Ny]
134 Piston (3) 98181-1 [C]
135 Wrist Pin (3) 97873 [C]
136 Snap Ring
(25mm ID)
(3) 161M13N25 [C]
137 Dowel Pin
(M3 x 40 mm)
(3) 17M13B170 [C]
138 Screw
(M4 x 0.7 - 6g x 8 mm)
(3) 119M2A126B [C]
Item Description (size) Qty Part No. [Mtl]
139 Wrist Pin Journal (3) 98052 [Br]
140 Connecting Rod,
Journal-Side
(3) 97855-1 [C]
141 Screw
(5/16-18 x 1”)
(6) 97867 [C]
142 Rider Band (3) 98184 [Br]

143 U-Cup Seal (3) 97875 [PU]
144 Bushing, Vent (3) 98180 [Ny]

145 O-Ring
(1/8” x 4-1/4” OD)
(3) Y325-242 [B]
146
Screw
(M12 x 1.75 - 6g x 30 mm)
(EP20-AXXXX-XXX-XXX)
(EP20-CXXXX-XXX-XXX)
(12) Y256-122-E [C]
Screw
(M12 x 1.75 - 6g x 30 mm)
(EP20-SXXXX-XXX-XXX)
(12) 119M2H274 [SS]
147
Air Cap
(EP20-AXXXX-XXX-XXX)
(EP20-CXXXX-XXX-XXX)
(3) 97861 [A]
Air Caps
(EP20-SXXXX-XXX-XXX)
(3) 98088 [SS]
148 Roll Pin
(M6 x 16 mm)
(7) 25M13EA467 [C]
180 Drain Plug
(3/8”-18 NPT )
(1) 98062 [SS]
181 "Fitting
(3/8” OD Tube x 1/4” NPT 90
°
Elbow)"
(3) 59756-160 [Ny]
182 "Fitting
(3/8” OD Tube x 1/4” NPT 45 ° Elbow)"
(3) 98060 [Ny]
183 Fitting
(1/2” OD Tube x 3/8” NPT)
(6) 98054 [P]
184 Tubing
(3/8" OD) (Black)
(1.4 ft) 98225-XXX-X [Ny]
185 Tubing
(1/2" OD) (Black)
(3.6 ft) 98226-XXX-X [Ny]
186 Grommet, Air Cap Tubing (3) 98189 [NEP]
187 Ground Lug
(1/4” - 20)
(1) 96878 [Co]
188 Fitting
(3/8” OD Tube x 1/4” NPT 90
°
Elbow)
(1) 59756-160 [Ny]
189 Plug (5) 98056 [P]
190 Sight Glass
(1/2” - 14 NPT)
(1) 98061 [C]
192 Screw
(M12 x 1.75 - 6g x 30 mm)
(4) Y255-121-E [C]

200 Oil container
(7.5 L)
(Aftermarket Only)
(1) 67570
283 Leak Detection
(2 meter cable)
(3) See page 14

Item 172 (see page 35) and Item 200 included in 637557 Oil and fil-
ter replacement kit.

Indicate parts included in 637556 Pump Crankcase Seal Service Kit shown above and items 151, 154, 156, 157 and 165 shown on page 35.
CRANKCASE SERVICE

Crankcase section Service is continued from Fluid Section
repair.

Separate motor from pump.

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 instal-
lation.

Lubricate “O” rings with crank case oil.

Do not over-tighten fasteners, refer to torque specifica-
tion block on view.

Torque fasteners following restart.
CRANKCASE DISASSEMBLY

Remove all flexible tube connection.

Remove lower cap (114).

Adjust Piston rod (134) position by rotating crank shaft
(118) for ease in removing internal component.

Remove Vent Bushing (144), Piston seal (143), Air cap (147),
Piston wear ring (142), Cylinder(130).

Pump Crankcase Replacement Assembly EP20-CSVX-00-A
:
Includes all Items shown in the Crankcase parts list (below) except for
item 283. Includes all items shown in the oil pump parts list (page 35). Includes items 13, 16 and 17 shown on page 27.
Note : Crankcase components are designed for the intended life of the pump. Crankshaft bearings are press fit in place and are
not individually available for aftermarket replacement.