How To Replace the Hayward Slide Valve Internal Shaft O-Ring

WRITTEN BY:  Inyo Pools

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The Hayward Filter Control Slide Piston Assembly, has four O-rings, three on the outside of the Assembly and 1 inside the assembly. To access this internal O-ring for maintenance or repair, you will have to partially disassembly the Assembly. This guide shows you how to access the Internal Shaft O-ring.

Step by Step

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Step 1

TURN POWER OFF - Make sure that power to the pump is turned OFF before you open up the Slide Valve.

Step 2

REMOVE BONNET NUT - Unscrew the Bonnet Nut counter-clockwise to free it from the Body Assembly.

Step 3

PULL OUT SHAFT ASSEMBLY - Pull straight up on the Handle to lift it and the Shaft Assembly out of the Body Assembly

Step 4

PULL OUT DRIVE PIN - The Drive Pin is in tight so you will have to punch it out most of the way with an awl or small punch. Put a board under the shaft to support the impact so you don't bend the shaft. After you have punched the Pin most of the way out, grab the other end with a pair of piylers and pull it out the rest of the way.

Step 5

SEPARATE HANDLE AND SHAFT ASSEMBLY FROM PISTON - The Handle and Shaft Assembly out of the Piston.

Step 6

SEPARATE HANDLE AND SHAFT FROM BONNET - Slide the Bonnet off the Shaft.

Step 7

LOCATE AND REMOVE O-RING - The small Shaft O-ring in located in a groove inside the Bottom end of the Bonnet. Use a toothpick to work the O-ring out of the groove and up out of the Bonnet.

Step 8

LUBRICATE 0-RING - Inspect the O-ring for wear or damage. Replace if necessary. Then lubricate the O-ring with a silicon or Teflon based lubricant as identified above.

Step 9

REPLACE O-RING - Place the O-ring back in the groove. This can be tricky. Use a small screwdriver to work the O-ring into the groove. To keep the O-ring from going pass the groove as you are placing it, slide the Shaft into the Bonnet up to the groove.

Step 10

SLIDE SHAFT INTO BONNET - Slide the Shaft and Handle the rest of the way into the Bonnet.

Step 11

SLIDE SHAFT INTO PISTON - Slide the Shaft and Handle into the Piston and rotate the Shaft so that the hole in the end of the Shaft lines up with hole in the Piston.

Step 12

REPLACE DRIVE PIN - With the holes aligned, tap the Drive Pin partially into the Shaft to make sure it is aligned correctly. Then use an awl or small punch to insert the Pin the rest of the way. Be sure to support the shaft as shown so you don't bend it.

Step 13

REPLACE SHAFT ASSEMBLY - When you slide the Shaft Assembly back into the Valve Body Assembly, note the notch in the Body Assembly and the lug on the Bonnet. Ensure that these line up when you insert the Shaft Assembly.

Step 14

SECURE BONNET NUT - Screw the Bonnet Nut clockwise back onto the Body Assembly. Hand tighten.

Comments

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(1 to 10 of 10)

inyopools  Posted: 05/20/2017 11:22 AM  Inyo Product Specialist

Anonymous (drain filter) - No, you do not have to drain the filter before opening up the valve body. However, when you open up the valve, the filter will probably drain to a lower level because you have broken the pressure seal.


Anonymous  Posted: 05/19/2017 11:55 AM 

Do you have to drain the filter before opening up the valve body?


Anonymous  Posted: 04/06/2017 23:37 PM 

Gracias.


Inyopools  Posted: 08/01/2016 11:04 AM  Inyo Product Specialist

MK - Something may be damaged in the Slide Valve Handle and Piston Assembly. Take the assembly out of the Valve Body Assembly to check it and the inner O-rings. See our guides on "How To Operate a Hayward Slide Valve" and "How To Replace the Hayward Slide Valve Handle and Piston Assembly".


MK  Posted: 07/29/2016 14:14 PM 

The shaft will not rotate for the backwash. Is this something other than the O-rings?


magnums  Posted: 08/25/2015 18:35 PM 

good information. replacing the o rings solved my leaking backflush issue. pictures were very helpful.


Inyopools  Posted: 10/27/2014 11:17 AM  Inyo Product Specialist

O-Ring sizes - Thank you for your feedback. I will add this information in the guide that addresses the external O-rings: "How To Maintain a Hayward Filter Control Slide Valve".


Anonymous  Posted: 10/24/2014 18:34 PM 

the two thick o-rings are dif sizes.(smaller id bottom and larger ID in the middle?)The larger but smaller thickness ring on top.The bottom 2 rings are close in size.


Anonymous  Posted: 08/30/2014 16:23 PM 

thanks great advice


davey  Posted: 06/02/2014 12:15 PM 

Thank you for the very useful information. I got all the o rings replaced, but I couldn't figure out the little tiny one. That was very helpful. You are the only ones that have this much detailed info. Great job.