Parts List / 670106 Fluid Section

637303-TA fluid section service kits include: Balls (item 22), diaphragms (item 7) plus items 19, 70, 144, 175 (listed below) plus 174 and 94276 Lubriplate® FML-2 grease (page 6).

PARTS LIST

Item	Description (size)	Qty	Part No.	[Mtl]

1	Rod	(1)	94984	[C]

5	Backup Washer	(2)	66167	[SS]

6	Diaphragm Screw	(2)	94094	[SS]

7	Diaphragm	(2)	94091-A	[Sp]
15	Fluid Cap	(2)	94107	[SS]

19	“O” Ring (3/16” x 5” o.d.)	(4)	Y328-350	[T]
21	Seat	(4)	94113	[SS]

22	Ball (3-1/4” diameter)	(4)	94103-T	[T]
26	Screw (M12 x 1.75 - 6g x 45 mm)	(12)	94412-2	[SS]

27	Screw (M12 x 1.75 - 6g x 60 mm)	(16)	94991	[SS]

29	Nut (M12 x 1.75 - 6h)	(16)	95053	[SS]

9Indicates items included in 637421 air section repair kit.

FLUID SECTION DISASSEMBLY

1.Remove top manifold(s).

2.Remove (22) balls, (19) “O” rings and (21) seats.

3.Remove (15) fluid caps.

4.Remove (6) diaphragm screws, (7) diaphragms and (5) backup washers.

NOTE: Do not scratch or mar the surface of (1) diaphragm rod.

FLUID SECTION REASSEMBLY

SERVICE NOTE: ARO pn 94094-TIL diaphragm assembly tool is recommended for use when reassembling the pump.

yReassemble in reverse order.

yClean and inspect all parts. Replace worn or damaged parts with new parts as required.

yLubricate (1) diaphragm rod and (144) “U” cup with Lubri- plate FML-2 grease. (94276 grease packet is included in service kit.)

yBe certain the diaphragm assembly bottoms out on the

(1) rod.

yRe-check torque settings after pump has been re-started and run a while.

Item	Description (size)		Qty	Part No.	[Mtl]

32	Leg		(2)	94703-2	[SS]

43	Ground Lug (see page 7)		(1)	93004	[Co]

60	Inlet Manifold		(1)	96785	[SS]

61	Outlet Manifold		(1)	96784	[SS]

68	Air Cap		(1)	94030-1	[A]

69	Air Cap		(1)	94030-2	[A]

9 70	Gasket		(2)	94100	[B]
131	Screw (M10 x 1.5 - 6g x 120 mm)		(4)	94531	[C]

9 144	“U” Cup (3/16” x 1-3/8” o.d.)		(2)	Y186-51	[B]
9 175	“O” Ring (3/32” x 1” o.d.)		(2)	Y325-117	[B]
9 180	Gasket (0.406” i.d. x 0.031” thick)		(4)	94098	[Co]

			MATERIAL CODE
		[A]	= Aluminum
		[B]	= Nitrile
		[C]	= Carbon Steel
		[Co]	= Copper
		[Sp]	= Santoprene
		[SS]	= Stainless Steel
		[T]	= PTFE

1.Apply Loctite 271 Threadlocker to thread (3) on (5) Back- up Washer.

2.Insert (7) Diaphragm insuring seal bead on (7) Diaphragm is in the groove on (5) Back-up Washer.

3.Thread (6) Diaphragm Screw onto the stud on (5) Back-up Washer.

Applying a light coating of Lubriplate FML-2 Grease to the surfaces of (6) Diaphragm Screw and (7) Diaphragm, being careful not to get grease on the Loctite prepared area. This will reduce friction during tightening of the assembly. Tighten 65-70 Ft-Lbs.

Diaphragm Assembly

ASSEMBLING DIAPHRAGM ASSEMBLY

Diaphragm assembly: (3) Thread, (5) Back-up Washer, (6) Diaphragm Screw, (7) Diaphragm.

1.Screw the two Diaphragm Assemblies to (1) Rod.

2.Tighten Diaphragm Assemblies to 65-70 Ft-Lbs. Be sure to torque both sides.

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670106 (en)