07-312-600R - Shaft Diameter: 3-1/2", Stern Tube Diam: 6" to 6-1/8"

As with any rubber hose below the waterline, the PSS bellows must be inspected on a regular basis for any sign of wear, aging or chemical deterioration. PYI suggests preventative maintenance. The PSS bellows should be replaced in six-year intervals. 

As with any rubber hose below the waterline, the PSS bellows must be inspected on a regular basis for any sign of wear, aging or chemical deterioration. PYI suggests preventative maintenance. The PSS bellows should be replaced in six-year intervals. During bellows replacement it is recommended that the O-rings and set screws in the stainless steel rotor also be replaced. The bellows may need to be more frequently inspected in an environment where non-sealed batteries emit sulfuric acid. Sulfuric acid vapor will accelerate rubber deterioration, as will an ozonater.

Maintenance Kits include the items you need to properly maintain your PSS Shaft Seal. Included in the kit is one PSS bellows, two O-rings, five set screws, four new hose clamps and an Allen key. Select the appropriate Maintenance Kit for your application by choosing the correct shaft and stern tube dimension.

KIT CONTENTS

• One (1) PSS bellows
• Two (2) O-rings
• Five (5) set screws
• Four (4) new hose clamps
• One (1) Allen key

KIT APPLICATION AND MORE INFORMATION

We offer PSS Shaft Seal Maintenance Kits to fit PSS "Type A" shaft seals, which fit shafts from 3/4" up to 3 3/4" in diameter. If you have a PSS Seal for a larger shaft, maintenance kits are available by Special Order. 

DIMENSIONS

Shaft Diameter: 3-1/2"
Stern Tube Diameter: 6" to 6-1/8"

FAQs

What general maintenance should I be considering for a PSS Shaft Seal that is working perfectly well with no apparent issues?

Given the quality of the PSS Shaft Seal this is what we would expect where very little maintenance is generally necessary. Typically the carbon and stainless steel sealing components will not need replaced where we see many commercial vessels recording over 40,000 engine hours on original components. That said, we do recommend the rubber bellow component be replaced in 6 year intervals as precautionary maintenance kit for this replacement which includes the rubber bellow and all necessary hardware.

Can I re-use my set screws when making an adjustment or removing the PSS Shaft Seal?

No, please be sure to never use the same set screw on the shaft twice. There are two set screws in each of the two holes in the stainless steel rotor. One is tightened onto the shaft and the other is tightened onto the first to lock it in place against the shaft. The set screws are made with a cup at the base that compresses into the shaft ensuring a secure grip. PYI's PSS Maintenance Kit comes with five new set screws included. When re-installing the rotor please use new set screws. In the case that you do not have spare set screws, the set screws in the rotor need to be reversed so there is an unused cup being compressed onto the shaft. (See image below for more details)



WATCH THIS VIDEO WITH MORE FAQs & INFORMATION

1. What general maintenance is should you consider for the PSS Shaft Seal? - 0:18
2. Can you re-use the set screws? - 1:04
3. What you do if you hear a high pitched "squealing" sound that seems to be coming from the PSS Shaft Seal? - 1:35
4. Does the PSS Shaft Seal have a "break-in" period? - 2:03
5. Your PSS Shaft Seal is leaking at rest, what should you do? - 2:29
6. Your PSS Shaft Seal is beyond the "break-in" period, does not leak at rest, but continues to mist during operation. - 3:00
7. You have a slow speed boat that will never exceed 12 knots under power, do you need a positive water feed to the PSS Shaft Seal? - 3:54
8. You have a high speed boat that will exceed 12 knots under power, do you need a positive water feed to the PSS Shaft Seal? - 4:28