Parts List / 670106 AIR Motor Section

9Indicates parts included in 637421 air section repair kit.

AIR MOTOR PARTS LIST

Item	Description (size)	Qty	Part No.	[Mtl]
101	Center Body	(1)	94028	[A]

103	Bushing	(1)	94092	[D]

105	Screw (M6 x 1 - 6g x 20 mm)	(4)	95887	[SS]

111	Spool	(1)	95651	[D]

118	Actuator Pin (0.250” x 2.276” long)	(2)	94083	[SS]

121	Sleeve	(2)	94084	[D]

127	90˚ St. Elbow (1-1/2 - 11-1/2 N.P.T.)	(1)	94860	[C / I]

128	Set Screw (1/4” - 20 x 1/4”)	(2)	Y29-42-S	[SS]

9 132	Gasket	(1)	94099	[B]
133	Lockwasher (1/4”)	(3)	Y117-416-C	[C]

134	Screw (M6 x 1 - 6g x 30 mm)	(4)	96358	[SS]

135	Valve Housing	(1)	96334-1	[A]

136	Plug	(1)	96335	[A]

9 137	“O” Ring (1/16” x 2” o.d.)	(1)	Y325-32	[B]
9 138	“U” Cup (3/16” x 1.792” o.d.)	(1)	95966	[B]
9 139	“U” Cup (3/16” x 1-1/4” o.d.)	(1)	Y186-50	[B]
140	Valve Insert	(1)	95650	[Ck]

141	Valve Plate	(1)	95659	[Ck]

9 166	Track Gasket	(1)	94026	[B]
9 167	Pilot Assembly (includes 168 and 169)	(1)	67164	[D]

MATERIAL CODE

[A] =	Aluminum	[Ck] = Ceramic		[Sp] = Santoprene
[B] =	Nitrile	[D] =	Acetal	[SS] =	Stainless Steel
[Br] =	Brass	[I] =	Cast Iron	[U] =	Polyurethane
[C] =	Carbon Steel

AIR MOTOR SECTION SERVICE

Service is divided into two parts - 1. Pilot Valve, 2. Major Valve.

GENERAL REASSEMBLY NOTES:

yAir Motor Section service is continued from Fluid Section repair.

yInspect and replace old parts with new parts as neces- sary. Look for deep scratches on metallic surfaces, and nicks or cuts in “O” rings.

yTake precautions to prevent cutting “O” rings upon instal- lation.

yLubricate “O” rings with Lubriplate FML-2 grease.

yDo not over-tighten fasteners. Refer to torque specifica- tion block on view.

yRe-torque fasteners following restart.

ySERVICE 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.

Item	Description (size)	Qty	Part No.	[Mtl]
168	“O” Ring (3/32” x 5/8” o.d.)	(2)	94433	[U]
169	“U” Cup (1/8” x 7/8” o.d.)	(1)	Y240-9	[B]
170	Piston Sleeve	(1)	94081	[Br]
9 171	“O” Ring (3/32” x 1-1/8” o.d.)	(1)	Y325-119	[B]
9 172	“O” Ring (1/16” x 1-1/8” o.d.)	(1)	Y325-22	[B]
9 173	“O” Ring (1/16” x 1-3/8” o.d.)	(2)	Y325-26	[B]
9174	“O” Ring (1/8” x 1/2” o.d.)	(2)	Y325-202	[B]
9 176	Diaphragm (check valve)	(2)	94102	[Sp]
9 199	Track Gasket	(1)	95666	[B]
9 200	Gasket	(1)	95665	[B]
201	Muffler (includes item 127)	(1)	94810
233	Adapter Plate	(1)	96336	[A]
240	Screw (M6 x 1 - 6g x 16 mm)	(2)	95991	[SS]
9 241	Track Gasket	(1)	96344	[B]
9 242	“O” Ring (1/16” x 7/32” o.d.)	(1)	Y325-5	[B]
9 243	“O” Ring (1/8” x 5/8” o.d.)	(1)	Y325-204	[B]
9 244	“O” Ring (1/8” x 7/8” o.d.)	(1)	Y325-208	[B]
9	Lubriplate FML-2 grease	(1)	94276
	Lubriplate grease packets	(10)	637308

Indicates items included in 637303-TA fluid section repair kit.

2.Install new (171 and 172) “O” rings. Replace (170) sleeve.

3.Install new (168) “O” rings and (169) seal - Note lip direc- tion. Lubricate and replace.

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.Remove (233) adapter plate, releasing (140) valve insert, (141) valve plate, (199, 200 and 241) gaskets and (243 and 244) “O” rings.

3.Remove (136) plug 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 housing.

3.Install (137 and 242) “O” rings on (136) plug and assemble plug to (135) valve housing, securing with (105) screws.

4.Install (140) valve insert, (141) valve plate, (199) gasket and (243 and 244) “O” rings into (135) valve housing. NOTE: Assemble (140) valve insert with “dished” side to- ward (141) valve plate. Assemble (141) valve plate with part number identification toward (140) valve insert.

5.Assemble (200 and 241) gaskets and (233) adapter plate to (135) valve housing, securing with (240) screws.

6.Assemble (132 and 166) gaskets and (176) checks to (101) center body.

7.Assemble (135) valve housing and components to (101) center body, securing with (134) screws.

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670106 (en)