Kenmore 153.339572, 153.33955, 153.339473 Replacing the Pilot/ Pilot Tube Assembly, Figure Figure

6.Position the new thermocouple through the bottom opening of the manifold component block (Figure 34). Be sure igniter wire is positioned through the small opening of the manifold component block.

7.Re-attach the burner. Note the orientation of the burner (Figure 33.)

8.See “Replacing the Manifold/Burner Assembly.”

FERRULE NUT
THERMOCOUPLE
	IGNITER WIRE
	PILOT	PILOT BRACKET
		OTHER FITTINGS
		NOT SHOWN
		FOR CLARITY
MANIFOLD TUBE		RETAINER
		CLIP
MANIFOLD COMPONENT
BLOCK	PILOT TUBE	MANIFOLD/BURNER
		DOOR OPENING

FIGURE 34.

FIGURE 35.

Replacing the Pilot/ Pilot Tube Assembly

1.Remove the manifold/burner assembly. See “Removing the Manifold/Burner Assembly.”

2.Lift the retainer clip straight up from the back of the manifold component block (using a flat-blade screwdriver), then remove the manifold component block from the manifold door (Figure 34.)

IMPORTANT: Be careful not to bend or alter the position of the pilot tube. It will be used as a bending template for the new pilot assembly.

3.Take off the burner by removing the two (2) screws located underneath the burner. See Figure 33.

4.Remove and keep the screw securing the pilot assembly to the pilot bracket. (Figure 36)

5.Remove and keep the old pilot tube and thermocouple.

6.Using the old pilot tube as a guide, bend the new pilot tube to match the old one. NOTE: Make only the bends closest to the pilot before going to the next step. (Figure 36)

SCREW

OLD PILOT ASSEMBLY

PILOT TUBE	OTHER FITTINGS
	NOT SHOWN
	FOR CLARITY

7.Route the new pilot tube, thermocouple, and igniter wire through the manifold/burner door opening. (Figure 34)

8.Connect the new pilot tube and tighten the nut securing it to the pilot assembly. IMPORTANT: Keep the pilot orifice in the pilot when making the connection. Do not operate the water heater without the pilot orifice installed.

9.Install the thermocouple, making sure that it is fully seated.

10.Re-attach the pilot assembly to the pilot bracket and secure using the screw removed earlier.

11.Re-attach the burner. Note the orientation of the burner (Figure 33).

12.Position the new pilot tube through the largest opening of the manifold component block. NOTE: The largest opening should be located at the top position. The igniter wire should be located in the middle opening and thermocouple in the bottom opening (Figure 37).

PILOT TUBE

IGNITER WIRE

THERMOCOUPLE

MANIFOLD COMPONENT BLOCK

FIGURE 37.

13.Reposition the manifold component block in the manifold door opening and secure it with the retainer clip.

14.Carefully bend the new pilot tube and thermocouple to match the bend of the manifold tube. NOTE: When bending, DO NOT crimp or crease the pilot tube or thermocouple. (Figure 34)

15.Before you proceed to the next step, install the new brass ferrule nut in the gas control valve/thermostat’s pilot tube opening. HAND TIGHTEN ONLY.

16.See “Replacing the Manifold/Burner Assembly.”

Cleaning the Combustion Chamber and Flame-arrestor

1.Follow procedure outlined in “Removing the Manifold/ Burner Assembly.”

2.Use a vacuum cleaner/shop vac to remove all loose debris in the combustion chamber (Figure 38). Use compressed air to clear any dust or debris that may have accumulated in the flame-arrestor.

COMBUSTION CHAMBER

FLAME ARRESTOR

DOOR GASKET

BASE-RING

FILTER

IGNITER WIRE

THERMOCOUPLE

FIRST BEND(S)

FIGURE 38.

FIGURE 36.

3.Reassemble by following the procedure under “Replacing the Manifold/Burner Assembly.”

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