Wagner SprayTech 9146 Fluid Section Seal Replacement Instructions, Assembly of the Fluid Section

Fluid Section Seal Replacement Instructions

Kit Part Number 0512228A (9140S, 9146, 9150) Kit Part Number 0516725 (9170, 9190)

WARNING

Always wear protective eye wear while servicing the pump. Be sure to follow the Pressure Relief Procedure (page 7) when shutting the unit down for any purpose, including servicing or adjusting. After performing the Pressure Relief Procedure, be sure to unplug the unit before servicing or adjusting. Area must be free of solvents and paint fumes.

Disassembly of the Fluid Section

1.Remove the suction set.

2.Remove the front cover and the four screws that secure it using a T20 Torx head driver.

3.Remove the yoke screw and washer that secures the dowel pin. The dowel pin connects the yoke to the piston.

4.Using a pliers, pull the dowel pin out.

5a. For models 9140S, 9146, and 9150, rotate the pump shaft so the piston is in the top dead center position. This can be done by pushing on the yoke. This is required to disassemble all the parts.

5b. For models 9170 and 9190, inspect the yoke assembly and piston. In order to remove all the necessary parts, the piston must not be in the bottom dead center position. If the piston is at the bottom of the stroke, install the front

(inlet) of the housing, and tighten with an adjustable wrench. This will drive the bottom seal into the correct position.

5.Align the piston with the yoke. Be careful not to damage the piston.

6.Apply a lithum grease to the holes in the yoke where the dowel is inserted.

7.Install the dowel pin to connect the yoke to the piston. The piston may have to be moved up or down to do this. The inlet valve may need to be removed again to move the piston.

8.Install the yoke screw and washer to secure the dowel pin.

9.Turn pump right side up and apply a few drops of Separating Oil or light household oil between the top nut and piston. This will prolong the seal life.

cover and screws, turn the pump on briefly to index the piston, unplug the unit, and repeat step 2.

6.Unscrew and remove the inlet valve assembly (see page 20).

7.Remove the piston assembly by pushing down on the piston near the yoke.

8.Unscrew and remove the top nut using and adjustable wrench.

9.Remove the worn seals using a flat head screwdriver or punch. Remove the top seal from the top and the bottom seal from the bottom by pressing against the side of the seal and popping it out. Be sure not to scratch the housing where the seals are located.

10.Clean the area where the new seals are to be installed.

Assembly of the Fluid Section

1. Lubricate the new top seal with Separating Oil (P/N 0516913)

or light household oil and by hand place the seal (cup side of

seal down) into the top port of the housing.

10.Install front cover and four (4) screws.

11.Replace inlet valve. Install the suction set.

Top nut

Top seal (cup down)

Yoke

Dowel Washer

0512228A Kit (9140S, 9146 and 9150)

0516724 Kit (9170, 9190)

Screw

2. Place a small amount of anit-seize on the threads of the top

nut. Place the top nut into the top of the housing and

tighten with an adjustable wrench. This will drive the top

seal into the correct position.

3. Turn the pump upside down. Lubricate the seal on the piston/seal assembly similar to the top seal. Place the piston/seal assembly into the bottom of the housing. Insert the plastic insertion tool and thread into position to properly seat the piston/seal. Thread fully until tight. Remove the insertion tool.

4.Install the new O-ring on the inlet valve assembly, lubricate with Separating Oil (P/N 0516913), thread into the bottom

	Piston/seal	0512228A Kit
	assembly	(9140S, 9146
		and 9150)
Insertion	CAUTION! DO NOT	0516724 Kit
		(9170, 9190)
tool	attempt to remove the
	seals from the piston.
	O-ring
	Inlet valve assembly
	0516292 (9140S,9146, 9150)
	0516296 (9170, 9190)

21 English