Ingersoll-Rand manual PARTS LIST / AD40A-X-XAIR MOTOR SECTION, Air Motor Section Service

PARTS LIST / AD40A-X-X AIR MOTOR SECTION

nIndicates parts included in 637436 Air Section Service Kit.

SERVICE KIT NOTE: Service Kit 637436 is a general repair kit for all 1” and larger ARO diaphragm pump air motors. It contains extra “O” rings and extra parts that may not be needed to service this model.

Item	Description (size)	Qty	Part No.	[Mtl]
101	Motor Body	(1)	94744	[A]
n102	“O” Ring (1/16” x 1-1/4” o.d.)	(2)	Y325-24	[B]
V 103	Sleeve	(1)	94528	[D]
n104	Retaining Ring, TruArc (1-5/32” i.d.)	(2)	Y145-26	[C]
105	Screw/Wshr (1/4”-20 x 5/8”) (AD40A-XXP-)	(8)	93860	[C]
	Cap Screw (1/4”-20 x 5/8”) (AD40A-XXS-)	(8)	Y6-42-T	[SS]
106	Lockwasher (1/4”) (AD40A-XXS-)	(8)	Y14-416-T	[SS]
107	Plate	(2)	93707-1	[SS]
n108	Gasket (with notch)	(1)	92878	[B/Ny]
V 109	Piston	(1)	92011	[D]
n110	“U” Cup (3/16” x 1-3/8” o.d.)	(1)	Y186-51	[B]
V 111	Spool	(1)	92005	[A]
V 112	Washer (1.557” o.d.)	(5)	92877	[Z]
n113	“O” Ring (small) (1/8” x 1-1/4” o.d.)	(5)	Y325-214	[B]
n114	“O” Ring (large) (3/32” x 1-9/16” o.d.)	(6)	Y325-126	[B]
V 115	Spacer	(4)	92876	[Z]
V 116	Spacer	(1)	92006	[Z]

AIR MOTOR SECTION SERVICE

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

GENERAL REASSEMBLY NOTES:

SAir Motor Section Service is continued from Fluid Section repair. S Inspect and replace old parts with new parts as necessary. Look for

deep scratches on metallic surfaces, and nicks or cuts in “O” rings. S Take precautions to prevent cutting “O” rings upon installation.

S Lubricate “O” rings with Key-Lube grease.

S Do not over-tighten fasteners, refer to torque specification block on view.

S Re-torque fasteners following restart.

PILOT VALVE DISASSEMBLY

1.Remove (104) retaining ring.

2.Remove (123) screws and (122) “O” rings.

3.Remove (118) piston rod, (121) sleeve bushing, (119) “O” rings and (120) spacers from the (101) motor body.

4.Remove (103) sleeve and (102) “O” rings.

PILOT VALVE REASSEMBLY

1.Replace two (102) “O” rings if worn or damaged and reinstall (103) sleeve.

2.Install one of the (121) sleeve bushings, (119) “O” rings, (120) spacers and the remaining (121) bushing.

3.Carefully push (118) pilot rod into bushings etc. and retain on each end with the two (122) “O” rings, retain with (123) screws.

4.Replace (104) retaining rings.

Item	Description (size)	Qty	Part No.	[Mtl]
n117	Gasket	(1)	92004	[B/Ny]
118	Pilot Rod	(1)	93309-2	[C]
n119	“O” Ring (1/8” x 3/4” o.d.)	(4)	93075	[U]
120	Spacer	(3)	115959	[Z]
121	Sleeve Bushing	(2)	98723-2	[Bz]
n122	“O” Ring (3/32” x 9/16” o.d.)	(2)	94820	[U]
n123	Screw (#8 - 32 x 3/8”)	(4)	Y154-41	[C]
126	Pipe Plug (1/2 - 14 P.T.F. x 17/32”)	(1)	Y227-5-L	[C]
127	90_ Street Elbow (3/4 - 14 N.P.T.)	(1)	Y43-5-C	[C]
128	Pipe Plug (1/8 - 27 P.T.F. x 1/4”)	(1)	Y227-2-L	[C]
133	Lockwasher (1/4”)	(1)	Y14-416-T	[SS]
197	Button Head Screw (1/4” - 20 x 1/4”)	(2)	94987	[SS]
198	Button Head Screw (1/4” - 20 x 3/8”)	(1)	94987-1	[SS]
201	Muffler	(1)	93139	[P]
n	Key-Lube “O” Ring Lubricant	(1)	93706-1
	10 Pak of Key-Lube		637175

nParts Y145-25 (0.925” i.d.) (qty 2) retaining rings and Y325-20 “O” rings (qty 2) are included in the service kit for the repair of smaller pumps.

MATERIAL CODE

[A] =	Aluminum	[D] =	Acetal	[U] =	Polyurethane
[B] =	Nitrile	[Ny] =	Nylon	[SS] = Stainless Steel
[Bz] =	Bronze	[P] =	Polypropylene	[Z] =	Zinc
[C] =	Carbon Steel

MAJOR VALVE DISASSEMBLY

1.Remove (107) plate (or leg depending on model), (108 and 117) gaskets.

2.On the side opposite the air inlet, push on the inner diameter of (111) spool. This will force the (109) piston out. Continue pushing the (111) spool and remove. Check for scratches and gouges.

3.Reach into the air section (exhaust side) and remove (116) spacer, (115) spacers, (113) “O” rings, (114) “O” rings, (112) washers, etc. Check for damaged “O” rings.

MAJOR VALVE REASSEMBLY

1.Replace (112) washer, (114) “O” ring and (113) “O” ring onto (115) spacer and insert etc.

NOTE: Be careful to orient spacer legs away from blocking in- ternal ports.

2.Lubricate and carefully insert (111) spool.

3.Install (117) gasket and (107).

4.Lubricate and install (110) packing cup and insert (109) piston into (air inlet side) cavity, the (110) packing cup lips should point outward.

5.Install (108) gasket and replace (107).

V “Smart Parts” Keep these items on hand in addition to the Service Kits for fast repair and reduction of down time.

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